David A. Tessler, DO
NPI 1659359883ActiveIndividual· Internal Medicine, Gastroenterology· Mesa, AZ
Internal Medicine, Gastroenterology (DO) in Mesa, Arizona, trained at Midwestern University, Chicago College of Osteopathic Med (class of 1998). Their prescriptions cost Medicare Part D more than their services did: $1,176,843 for 1,621 claims, against $116,731 paid for services in 2024. Abbvie Inc. was the largest of 25 companies reporting payments in 2025, $29,110 in all, mostly speaking and faculty fees.
Overview
| NPI | 1659359883 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | Jan 6, 2006 |
| Last updated in NPPES | Jan 30, 2026 |
| Certified by provider | Jan 30, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 4213 | AZ |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Gastroenterology (AZ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 474 |
|---|---|
| Services billed | 1,064 across 41 procedure codes |
| Paid by Medicare | $116,731 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,621 · 2,568 30-day fills |
|---|---|
| Patients | 529 |
| Total drug cost | $1,176,843 |
| Generic share | 73% of claims |
Education and affiliations
| Medical school | Midwestern University, Chicago College of Osteopathic Med |
|---|---|
| Graduation year | 1998 |
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
Medical groups
- Arizona Gastrointestinal Associates PLCScottsdale, AZ · 36 clinicians
- Central Arizona Medical Associates PCMesa, AZ · 12 clinicians
Hospital affiliation
- Banner Gateway Medical CenterGilbert, AZ
Industry payments (Open Payments)
- 2025$29,110 · 193 payments from 25 companies
- 2024$32,486 · 169 payments from 23 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $19,515 | 50 |
| Celltrion USA Inc. | $3,114 | 5 |
| Olympus Medical Systems Corporation | $1,788 | 2 |
| Madrigal Pharmaceuticals | $804.32 | 12 |
| Janssen Biotech, Inc. | $576.27 | 18 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$18,075 · 8 payments
- Food and Beverage$6,174 · 179 payments
- Consulting Fee$4,735 · 3 payments
- Education$84.00 · 1 payment
- Travel and Lodging$42.00 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 53 gastroenterologists in Mesa · All gastroenterologists in Arizona