DoctorsProofNPPES directory · verify at state boards

Gastroenterology in Detroit, MI

34 verified gastroenterology doctors in Detroit.

Gastroenterologists specialize in the digestive system, treating conditions of the stomach, intestines, liver, and pancreas.

NPPES tenure ≠ clinical experience. "Years on NPPES" is time since the physician first registered a National Provider Identifier, not time practicing medicine. Verify current license status with the state medical board.

Verify a license at the Michigan Board of Medicine

Dr. Milton Mutchnick, MD

Gastroenterology

20 yrs NPPES
NPI 1407894579
4160 JOHN R ST STE 615, Detroit, MI 48201(313) 745-4195
NPPES public registryAccepts Medicare (2024)
CMS Open Payments· $11,827 (2023)

Industry Payments (2023)

Reported by drug and device makers to CMS Open Payments. These payments are legal and disclosed — shown as context, not a judgment.

$11,827

Total received

40

Transactions

9

Paying companies

Top paying companies

Janssen Research & Development, LLC$6,131
Exact Sciences Corporation$4,355
Salix Pharmaceuticals, a division of Bausch Health US, LLC$521.78
Gilead Sciences, Inc.$361.74
AbbVie Inc.$232.36
Ortho Dermatologics, a division of Bausch Health US, LLC$117.70

Among the 17,272 gastroenterology doctors we've analyzed, about 63% received any industry payment (median $623 among those who did). This doctor's total is higher than 91% of that group — among the highest recipients.

Benchmark reflects doctors we've analyzed, not all US gastroenterology doctors.

Payments to Milton Mutchnick do not imply any wrongdoing. Many are meals, education, or research support.

Dr. Satish Maryala, MD

Gastroenterology

20 yrs NPPES
NPI 1881633170
4160 JOHN R ST, SUITE 917, Detroit, MI 48201(313) 745-4525
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Kurtis Smith, MD

Gastroenterology

20 yrs NPPES
NPI 1811911803
4646 JOHN R ST, Detroit, MI 48201(313) 576-1000
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Allen Yudovich, MD

Gastroenterology

20 yrs NPPES
NPI 1720097652
2799 W GRAND BLVD, DEPARTMENT OF GASTROENTEROLOGY, Detroit, MI 48202(313) 916-4021
NPPES public registryAccepts Medicare (2024)
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Fadi Antaki, MD

Gastroenterology

20 yrs NPPES
NPI 1124127048
4646 JOHN R ST, Detroit, MI 48201(313) 576-1000
NPPES public registryAccepts Medicare (2024)
CMS Open Payments· $35.45 (2023)

Industry Payments (2023)

Reported by drug and device makers to CMS Open Payments. These payments are legal and disclosed — shown as context, not a judgment.

$35.45

Total received

2

Transactions

2

Paying companies

Top paying companies

Gilead Sciences, Inc.$18.35
Medtronic, Inc.$17.10

Among the 17,272 gastroenterology doctors we've analyzed, about 63% received any industry payment (median $623 among those who did). This doctor's total is on the lower end — around the 42th percentile of that group.

Benchmark reflects doctors we've analyzed, not all US gastroenterology doctors.

Payments to Fadi Antaki do not imply any wrongdoing. Many are meals, education, or research support.

Dr. Dilip Moonka, MD

Gastroenterology

20 yrs NPPES
NPI 1982772430
HENRY FORD HEALTH SYSTEM, 2799 WEST GRAND BOULEVARD, Detroit, MI 48202(313) 916-2436
NPPES public registryAccepts Medicare (2024)
CMS Open Payments· $70,681 (2023)

Industry Payments (2023)

Reported by drug and device makers to CMS Open Payments. These payments are legal and disclosed — shown as context, not a judgment.

$70,681

Total received

46

Transactions

5

Paying companies

Top paying companies

Gilead Sciences, Inc.$44,919
INTERCEPT PHARMACEUTICALS, INC.$10,647
NOVARTIS PHARMACEUTICALS CORPORATION$10,373
AbbVie Inc.$4,724
Salix Pharmaceuticals, a division of Bausch Health US, LLC$17.61

Among the 17,272 gastroenterology doctors we've analyzed, about 63% received any industry payment (median $623 among those who did). This doctor's total is higher than 97% of that group — among the highest recipients.

Benchmark reflects doctors we've analyzed, not all US gastroenterology doctors.

Payments to Dilip Moonka do not imply any wrongdoing. Many are meals, education, or research support.

Dr. Rosanne Murphy, MD

Gastroenterology

20 yrs NPPES
NPI 1245308790
2799 W GRAND BLVD, Detroit, MI 48202(313) 916-2600
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Surinder Batra, MD

Gastroenterology

20 yrs NPPES
NPI 1083782510
HENRY FORD HEALTH SYSTEM, 2799 WEST GRAND BOULEVARD, Detroit, MI 48202(313) 916-2436
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Mark Blumenkehl, MD

Gastroenterology

20 yrs NPPES
NPI 1154499689
HENRY FORD HEALTH SYSTEM, 2799 WEST GRAND BOULEVARD, Detroit, MI 48202(313) 916-2600
NPPES public registry
CMS Open Payments· $29.00 (2023)

Industry Payments (2023)

Reported by drug and device makers to CMS Open Payments. These payments are legal and disclosed — shown as context, not a judgment.

$29.00

Total received

1

Transactions

1

Paying companies

Top paying companies

Pfizer Inc.$29.00

Among the 17,272 gastroenterology doctors we've analyzed, about 63% received any industry payment (median $623 among those who did). This doctor's total is on the lower end — around the 41th percentile of that group.

Benchmark reflects doctors we've analyzed, not all US gastroenterology doctors.

Payments to Mark Blumenkehl do not imply any wrongdoing. Many are meals, education, or research support.

Dr. Kimberly Brown, MD

Gastroenterology

20 yrs NPPES
NPI 1508934035
HENRY FORD HEALTH SYSTEM, 2799 WEST GRAND BOULEVARD, Detroit, MI 48202(313) 916-9106
NPPES public registryAccepts Medicare (2024)
CMS Open Payments· $140,089 (2023)

Industry Payments (2023)

Reported by drug and device makers to CMS Open Payments. These payments are legal and disclosed — shown as context, not a judgment.

$140,089

Total received

73

Transactions

9

Paying companies

Top paying companies

Gilead Sciences, Inc.$43,137
INTERCEPT PHARMACEUTICALS, INC.$32,597
Mallinckrodt Hospital Products Inc.$26,508
Salix Pharmaceuticals, a division of Bausch Health US, LLC$25,536
Bausch Health US, LLC$9,657
Alexion Pharmaceuticals, Inc.$1,900

Among the 17,272 gastroenterology doctors we've analyzed, about 63% received any industry payment (median $623 among those who did). This doctor's total is higher than 98% of that group — among the highest recipients.

Benchmark reflects doctors we've analyzed, not all US gastroenterology doctors.

Payments to Kimberly Brown do not imply any wrongdoing. Many are meals, education, or research support.

Dr. Panapakkam Singaracharlu, MD

Gastroenterology

20 yrs NPPES
NPI 1720156250
HENRY FORD HEALTH SYSTEM, 2799 WEST GRAND BOULEVARD, Detroit, MI 48202(313) 916-9106
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Stuart Gordon, MD

Gastroenterology

20 yrs NPPES
NPI 1679641112
2799 W GRAND BLVD, Detroit, MI 48202(313) 916-2600
NPPES public registryAccepts Medicare (2024)
CMS Open Payments· $255,089 (2023)

Industry Payments (2023)

Reported by drug and device makers to CMS Open Payments. These payments are legal and disclosed — shown as context, not a judgment.

$255,089

Total received

93

Transactions

14

Paying companies

Top paying companies

GlaxoSmithKline, LLC.$125,960
AbbVie Inc.$73,410
INTERCEPT PHARMACEUTICALS, INC.$13,644
Mirum Pharmaceuticals, Inc.$9,960
Intercept Pharma Europe Ltd.$9,906
Ipsen Pharma SAS$7,268

Among the 17,272 gastroenterology doctors we've analyzed, about 63% received any industry payment (median $623 among those who did). This doctor's total is higher than 99% of that group — among the highest recipients.

Benchmark reflects doctors we've analyzed, not all US gastroenterology doctors.

Payments to Stuart Gordon do not imply any wrongdoing. Many are meals, education, or research support.

Dr. Mostafa Ibrahim, MD

Gastroenterology

20 yrs NPPES
NPI 1194893636
2799 W GRAND BLVD, Detroit, MI 48202(313) 916-2600
NPPES public registryAccepts Medicare (2024)
CMS Open Payments· $18.09 (2023)

Industry Payments (2023)

Reported by drug and device makers to CMS Open Payments. These payments are legal and disclosed — shown as context, not a judgment.

$18.09

Total received

1

Transactions

1

Paying companies

Top paying companies

Smith+Nephew, Inc.$18.09

Among the 17,272 gastroenterology doctors we've analyzed, about 63% received any industry payment (median $623 among those who did). This doctor's total is on the lower end — around the 39th percentile of that group.

Benchmark reflects doctors we've analyzed, not all US gastroenterology doctors.

Payments to Mostafa Ibrahim do not imply any wrongdoing. Many are meals, education, or research support.

Dr. Nirmal Kaur, MD

Gastroenterology

19 yrs NPPES
NPI 1326166257
2799 W GRAND BLVD, Detroit, MI 48202(313) 916-2721
NPPES public registryAccepts Medicare (2024)
CMS Open Payments· $40,163 (2023)

Industry Payments (2023)

Reported by drug and device makers to CMS Open Payments. These payments are legal and disclosed — shown as context, not a judgment.

$40,163

Total received

9

Transactions

6

Paying companies

Top paying companies

Eli Lilly and Company$31,850
Celgene Corporation$5,628
AbbVie Inc.$2,465
E.R. Squibb & Sons, L.L.C.$130.00
Salix Pharmaceuticals, a division of Bausch Health US, LLC$67.34
Janssen Scientific Affairs, LLC$21.67

Among the 17,272 gastroenterology doctors we've analyzed, about 63% received any industry payment (median $623 among those who did). This doctor's total is higher than 96% of that group — among the highest recipients.

Benchmark reflects doctors we've analyzed, not all US gastroenterology doctors.

Payments to Nirmal Kaur do not imply any wrongdoing. Many are meals, education, or research support.

Dr. Robert Pompa, MD

Gastroenterology

19 yrs NPPES
NPI 1679693915
2799 W GRAND BLVD, Detroit, MI 48202(313) 916-8632
NPPES public registryAccepts Medicare (2024)
CMS Open Payments· $15.43 (2023)

Industry Payments (2023)

Reported by drug and device makers to CMS Open Payments. These payments are legal and disclosed — shown as context, not a judgment.

$15.43

Total received

1

Transactions

1

Paying companies

Top paying companies

Boston Scientific Corporation$15.43

Among the 17,272 gastroenterology doctors we've analyzed, about 63% received any industry payment (median $623 among those who did). This doctor's total is on the lower end — around the 38th percentile of that group.

Benchmark reflects doctors we've analyzed, not all US gastroenterology doctors.

Payments to Robert Pompa do not imply any wrongdoing. Many are meals, education, or research support.

Dr. Reena Salgia, MD

Gastroenterology

19 yrs NPPES
NPI 1528180601
2799 W GRAND BLVD, Detroit, MI 48202(313) 916-8899
NPPES public registryAccepts Medicare (2024)
CMS Open Payments· $71,283 (2023)

Industry Payments (2023)

Reported by drug and device makers to CMS Open Payments. These payments are legal and disclosed — shown as context, not a judgment.

$71,283

Total received

27

Transactions

7

Paying companies

Top paying companies

Merck Sharp & Dohme LLC$42,209
AbbVie Inc.$10,000
EISAI INC.$9,915
Genentech, Inc.$8,278
Salix Pharmaceuticals, a division of Bausch Health US, LLC$600.00
Cook Medical LLC$162.03

Among the 17,272 gastroenterology doctors we've analyzed, about 63% received any industry payment (median $623 among those who did). This doctor's total is higher than 97% of that group — among the highest recipients.

Benchmark reflects doctors we've analyzed, not all US gastroenterology doctors.

Payments to Reena Salgia do not imply any wrongdoing. Many are meals, education, or research support.

Dr. Jeffrey Christian Tang, MD

Gastroenterology

19 yrs NPPES
NPI 1457560161
2799 W GRAND BLVD, Detroit, MI 48202(313) 916-9100
NPPES public registryAccepts Medicare (2024)
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Christopher Fain, DO

Gastroenterology

19 yrs NPPES
NPI 1750583936
2799 W. GRAND BOULEVARD, HENRY FORD HOSPITAL, Detroit, MI 48202(313) 916-2600
NPPES public registryAccepts Medicare (2024)
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Sabeena Misra, MD

Gastroenterology

19 yrs NPPES
NPI 1598963084
4160 JOHN R ST, SUITE 917, Detroit, MI 48201(313) 745-4525
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Radhika Aggarwal, MD

Gastroenterology

19 yrs NPPES
NPI 1700084712
2799 W GRAND BLVD, K7, Detroit, MI 48202(313) 916-2408
NPPES public registryAccepts Medicare (2024)
CMS Open Payments· $126.00 (2023)

Industry Payments (2023)

Reported by drug and device makers to CMS Open Payments. These payments are legal and disclosed — shown as context, not a judgment.

$126.00

Total received

1

Transactions

1

Paying companies

Top paying companies

QOL Medical, LLC$126.00

Among the 17,272 gastroenterology doctors we've analyzed, about 63% received any industry payment (median $623 among those who did). This doctor's total ranks around the 50th percentile of that group.

Benchmark reflects doctors we've analyzed, not all US gastroenterology doctors.

Payments to Radhika Aggarwal do not imply any wrongdoing. Many are meals, education, or research support.

Dr. Humberto Gonzalez Gonzalez, MD

Gastroenterology

19 yrs NPPES
NPI 1043401086
2799 W GRAND BLVD, Detroit, MI 48202(139) 167-1783
NPPES public registryAccepts Medicare (2024)
CMS Open Payments· $768.94 (2023)

Industry Payments (2023)

Reported by drug and device makers to CMS Open Payments. These payments are legal and disclosed — shown as context, not a judgment.

$768.94

Total received

6

Transactions

3

Paying companies

Top paying companies

Salix Pharmaceuticals, a division of Bausch Health US, LLC$521.78
Novo Nordisk Inc$225.07
Boston Scientific Corporation$22.09

Among the 17,272 gastroenterology doctors we've analyzed, about 63% received any industry payment (median $623 among those who did). This doctor's total ranks around the 71th percentile of that group.

Benchmark reflects doctors we've analyzed, not all US gastroenterology doctors.

Payments to Humberto Gonzalez Gonzalez do not imply any wrongdoing. Many are meals, education, or research support.

Dr. Suneetha Duttala, MD

Gastroenterology

18 yrs NPPES
NPI 1760650006
3990 JOHN R ST, 6 HUDSON, Detroit, MI 48201(313) 745-7521
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Syed-Mohammed Jafri, MD

Gastroenterology

17 yrs NPPES
NPI 1801027644
2799 W GRAND BLVD, Detroit, MI 48202(313) 916-8899
NPPES public registryAccepts Medicare (2024)
CMS Open Payments· $140,687 (2023)

Industry Payments (2023)

Reported by drug and device makers to CMS Open Payments. These payments are legal and disclosed — shown as context, not a judgment.

$140,687

Total received

123

Transactions

9

Paying companies

Top paying companies

Takeda Pharmaceuticals U.S.A., Inc.$70,165
VectivBio AG$25,457
AbbVie Inc.$14,826
INTERCEPT PHARMACEUTICALS, INC.$13,850
Gilead Sciences, Inc.$12,792
Medivation LLC.$3,315

Among the 17,272 gastroenterology doctors we've analyzed, about 63% received any industry payment (median $623 among those who did). This doctor's total is higher than 98% of that group — among the highest recipients.

Benchmark reflects doctors we've analyzed, not all US gastroenterology doctors.

Payments to Syed-Mohammed Jafri do not imply any wrongdoing. Many are meals, education, or research support.

Dr. Kirthi Lilley, MD

Gastroenterology

16 yrs NPPES
NPI 1063733111
4646 JOHN R ST, 11M-GAS, Detroit, MI 48201(313) 576-1000
NPPES public registryAccepts Medicare (2024)
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Brian Ginnebaugh, MD

Gastroenterology

13 yrs NPPES
NPI 1841533874
2799 W GRAND BLVD, Detroit, MI 48202(800) 653-6568
NPPES public registryAccepts Medicare (2024)
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Karan Mathur, MD

Gastroenterology

13 yrs NPPES
NPI 1205277811
4160 JOHN R ST STE 615, Detroit, MI 48201(313) 745-4195
NPPES public registryAccepts Medicare (2024)
CMS Open Payments· $562.36 (2023)

Industry Payments (2023)

Reported by drug and device makers to CMS Open Payments. These payments are legal and disclosed — shown as context, not a judgment.

$562.36

Total received

25

Transactions

3

Paying companies

Top paying companies

AbbVie Inc.$333.33
Gilead Sciences, Inc.$137.20
Ardelyx, Inc.$91.83

Among the 17,272 gastroenterology doctors we've analyzed, about 63% received any industry payment (median $623 among those who did). This doctor's total ranks around the 67th percentile of that group.

Benchmark reflects doctors we've analyzed, not all US gastroenterology doctors.

Payments to Karan Mathur do not imply any wrongdoing. Many are meals, education, or research support.

Dr. Tasnia Matin, MD

Gastroenterology

12 yrs NPPES
NPI 1285044727
2799 W GRAND BLVD, Detroit, MI 48202(800) 653-6568
NPPES public registryAccepts Medicare (2024)
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Juan Reyes Genere, MD

Gastroenterology

12 yrs NPPES
NPI 1508279522
2799 W GRAND BLVD, Detroit, MI 48202(313) 916-2600
NPPES public registryAccepts Medicare (2024)
CMS Open Payments· $349.82 (2023)

Industry Payments (2023)

Reported by drug and device makers to CMS Open Payments. These payments are legal and disclosed — shown as context, not a judgment.

$349.82

Total received

2

Transactions

2

Paying companies

Top paying companies

Boston Scientific Corporation$201.05
CONMED Corporation$148.77

Among the 17,272 gastroenterology doctors we've analyzed, about 63% received any industry payment (median $623 among those who did). This doctor's total ranks around the 61th percentile of that group.

Benchmark reflects doctors we've analyzed, not all US gastroenterology doctors.

Payments to Juan Reyes Genere do not imply any wrongdoing. Many are meals, education, or research support.

Dr. Wael Dahhan, MD

Gastroenterology

10 yrs NPPES
NPI 1548618796
4160 JOHN R ST STE 615, Detroit, MI 48201(313) 745-4195
NPPES public registryAccepts Medicare (2024)
CMS Open Payments· $1,426 (2023)

Industry Payments (2023)

Reported by drug and device makers to CMS Open Payments. These payments are legal and disclosed — shown as context, not a judgment.

$1,426

Total received

23

Transactions

4

Paying companies

Top paying companies

Apollo Endosurgery US Inc$1,077
AbbVie Inc.$188.95
Gilead Sciences, Inc.$124.74
Takeda Pharmaceuticals U.S.A., Inc.$36.10

Among the 17,272 gastroenterology doctors we've analyzed, about 63% received any industry payment (median $623 among those who did). This doctor's total ranks around the 80th percentile of that group.

Benchmark reflects doctors we've analyzed, not all US gastroenterology doctors.

Payments to Wael Dahhan do not imply any wrongdoing. Many are meals, education, or research support.

Dr. Suraj Suresh, MD

Gastroenterology

10 yrs NPPES
NPI 1669823902
2799 W GRAND BLVD, Detroit, MI 48202(313) 916-2600
NPPES public registryAccepts Medicare (2024)
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Fadi Hawa, MD

Gastroenterology

9 yrs NPPES
NPI 1871024562
2799 W GRAND BOULEVARD NULL, Detroit, MI 48267(313) 916-2000
NPPES public registryAccepts Medicare (2024)
CMS Open Payments· $75.00 (2023)

Industry Payments (2023)

Reported by drug and device makers to CMS Open Payments. These payments are legal and disclosed — shown as context, not a judgment.

$75.00

Total received

1

Transactions

1

Paying companies

Top paying companies

FUJIFILM Healthcare Americas Corporation$75.00

Among the 17,272 gastroenterology doctors we've analyzed, about 63% received any industry payment (median $623 among those who did). This doctor's total is on the lower end — around the 45th percentile of that group.

Benchmark reflects doctors we've analyzed, not all US gastroenterology doctors.

Payments to Fadi Hawa do not imply any wrongdoing. Many are meals, education, or research support.

Dr. Amanda Su, MD

Gastroenterology

8 yrs NPPES
NPI 1306334131
2799 W GRAND BLVD, Detroit, MI 48202(313) 916-8632
NPPES public registryAccepts Medicare (2024)
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Eric Denha, MD

Gastroenterology

6 yrs NPPES
NPI 1346879541
3990 JOHN R ST, Detroit, MI 48201(313) 745-8040
NPPES public registry
CMS Open Payments· No payments in 2023

Industry Payments

No industry payments on record in the 2023 CMS Open Payments data. This doctor received no reported payments from drug or device makers that year.

Dr. Yara Dababneh, MD

Gastroenterology

6 yrs NPPES
NPI 1215556378
2799 W GRAND BLVD, Detroit, MI 48202(313) 916-1888
NPPES public registry
CMS Open Payments· $118.39 (2023)

Industry Payments (2023)

Reported by drug and device makers to CMS Open Payments. These payments are legal and disclosed — shown as context, not a judgment.

$118.39

Total received

1

Transactions

1

Paying companies

Top paying companies

Boston Scientific Corporation$118.39

Among the 17,272 gastroenterology doctors we've analyzed, about 63% received any industry payment (median $623 among those who did). This doctor's total is on the lower end — around the 49th percentile of that group.

Benchmark reflects doctors we've analyzed, not all US gastroenterology doctors.

Payments to Yara Dababneh do not imply any wrongdoing. Many are meals, education, or research support.

Gastroenterology in Detroit, MI — Verified | DoctorsProof | DoctorsProof