Dr. David A. Tendler, MD
Gastroenterology (Gastroenterology Physician)
- Medicare participating
At a glance
- Medical school
- Yale University School of Medicine (1993)
- Years since graduation
- 33
- In the NPI registry since
- 2006
- Medicare patients seen, 2024
- 368
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 1993Medical school: Yale University School of Medicine
- 2006Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Gastroenterology Physician primary
NC license 9901051
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Duke University Hospital Durham, NC
- Duke Regional Hospital Durham, NC
Medical groups
- Duke Health Integrated Practice, Inc (3,185 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 368
- Services billed
- 785
- Patients’ average age
- 73
| Service | Times | Patients |
|---|---|---|
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 133 | 133 |
| Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito | 126 | 124 |
| Established patient office or other outpatient visit, 30-39 minutes | 89 | 82 |
| Biopsy of large bowel using a flexible endoscope | 51 | 51 |
| New patient office or other outpatient visit, 30-44 minutes | 50 | 50 |
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 43 | 42 |
| Colorectal cancer screening; colonoscopy on individual at high risk | 38 | 38 |
| Use of a drug to induce depression of consciousness by physician performing a procedure, each additional 15 minutes | 20 | 18 |
| Diagnostic exam of large bowel using a flexible endoscope | 18 | 18 |
| Established patient office or other outpatient visit, 20-29 minutes | 15 | 15 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Omeprazole Other prescribers in Durham, NC | 173 |
| Pantoprazole Sodium Other prescribers in Durham, NC | 101 |
| Gavilyte-G (peg3350/sod sulf,bicarb,cl/kcl) Other prescribers in Durham, NC | 96 |
| Linzess (linaclotide) Other prescribers in Durham, NC | 71 |
| Famotidine Other prescribers in Durham, NC | 70 |
| Creon (lipase/protease/amylase) Other prescribers in Durham, NC | 41 |
| Amitriptyline Hcl Other prescribers in Durham, NC | 33 |
| Sod Sulf-Potass Sulf-Mag Sulf (sodium, potassium,mag sulfates) Other prescribers in Durham, NC | 23 |
| Mercaptopurine | 22 |
| Mesalamine Other prescribers in Durham, NC | 21 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 5 companies reported 14 payments worth $339 in total to this clinician.
| Pfizer Inc. | $137 |
|---|---|
| Janssen Biotech, Inc. | $84.00 |
| AbbVie Inc. | $68.84 |
| Genzyme Corporation | $24.99 |
| Novo Nordisk Inc | $23.97 |
| Food and Beverage | $255 |
|---|---|
| Education | $84.00 |
What the payments were for
| Company | What it was for | Amount |
|---|---|---|
| Janssen Biotech, Inc. Oct 24, 2025 | Education TREMFYA · Immunology · in-kind | $84.00 |
Each payment as the company reported it, with the products it named. Meals are counted in the totals above but not listed one by one.
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.