Mark H. Flasar, M.D.
NPI 1326079278ActiveIndividual· Internal Medicine, Gastroenterology· Annapolis, MD
Internal Medicine, Gastroenterology (M.D.) with Anne Arundel Gastroenterology Associates, P.A., practicing in Annapolis, Maryland. Their prescriptions cost Medicare Part D more than their services did: $2,204,143 for 929 claims, against $443,624 paid for services in 2024. Abbvie Inc. was the largest of 15 companies reporting payments in 2025, $18,696 in all, mostly speaking and faculty fees. Lists Luminis Health Anne Arundel Medical Center, Inc and 1 other hospital as hospital affiliations.
Overview
| NPI | 1326079278 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 6, 2006 |
| Last updated in NPPES | Oct 16, 2015 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | D60388 | MD |
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 (DC); Practitioner - Gastroenterology (MD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 865 |
|---|---|
| Services billed | 16,529 across 47 procedure codes |
| Paid by Medicare | $443,624 |
Part D prescriptions in 2024
| Prescriptions (claims) | 929 · 1,922 30-day fills |
|---|---|
| Patients | 247 |
| Total drug cost | $2,204,143 |
| Generic share | 82% of claims |
Education and affiliations
| Graduation year | 2000 |
|---|---|
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Anne Arundel Gastroenterology Associates, P.A.Stevensville, MD · 20 clinicians
Hospital affiliations
- Luminis Health Anne Arundel Medical Center, IncAnnapolis, MD
- University of MD Baltimore Washington Medical CenterGlen Burnie, MD
Industry payments (Open Payments)
- 2025$18,696 · 76 payments from 15 companies
- 2024$38,458 · 134 payments from 19 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $17,768 | 29 |
| Takeda Pharmaceuticals U.S.A., Inc. | $208.79 | 10 |
| Madrigal Pharmaceuticals | $179.40 | 11 |
| Janssen Biotech, Inc. | $163.06 | 7 |
| Pfizer Inc. | $113.77 | 6 |
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$14,950 · 6 payments
- Travel and Lodging$2,046 · 3 payments
- Food and Beverage$1,689 · 66 payments
- Education$10.48 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 33 gastroenterologists in Annapolis · All gastroenterologists in Maryland