Grishma Joy, M.D.
NPI 1336239656ActiveIndividual· Internal Medicine, Gastroenterology· Columbia, MD
Internal Medicine, Gastroenterology (M.D.) in Columbia, Maryland, trained at Wayne State University School of Medicine (class of 2003). 471 Medicare patients in 2024, $228,999 paid; nearly all of their 420 Part D prescriptions were generic (91%). Abbvie Inc. was the largest of 7 companies reporting payments in 2025, $505.78 in all, mostly food and beverage.
Overview
| NPI | 1336239656 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Oct 15, 2006 |
| Last updated in NPPES | Oct 3, 2017 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | D0064949 | 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 (MD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 471 |
|---|---|
| Services billed | 9,383 across 37 procedure codes |
| Paid by Medicare | $228,999 |
Part D prescriptions in 2024
| Prescriptions (claims) | 420 · 859 30-day fills |
|---|---|
| Patients | 196 |
| Total drug cost | $48,630 |
| Generic share | 91% of claims |
Education and affiliations
| Medical school | Wayne State University School of Medicine |
|---|---|
| Graduation year | 2003 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Chesapeake Digestive Associates, PCColumbia, MD · 38 clinicians
Hospital affiliation
- Johns Hopkins Howard County Medical CenterColumbia, MD
Industry payments (Open Payments)
- 2025$505.78 · 22 payments from 7 companies
- 2024$559.15 · 25 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $215.10 | 9 |
| Pfizer Inc. | $119.79 | 6 |
| Takeda Pharmaceuticals U.S.A., Inc. | $70.77 | 3 |
| Janssen Biotech, Inc. | $31.68 | 1 |
| Daiichi Sankyo Inc. | $28.76 | 1 |
What the 2025 payments were for
- Food and Beverage$505.78 · 22 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 36 gastroenterologists in Columbia · All gastroenterologists in Maryland