Mercedes Lim Ang, M.D.
NPI 1033341813ActiveIndividual· Internal Medicine· Ellsworth, ME
Internal Medicine (M.D.) with Hospital Medicine Services of Maine LLC and 1 other group, practicing in Ellsworth, Maine. 128 Medicare patients in 2024, $21,117 paid; nearly all of their 186 Part D prescriptions were generic (91%). Lists Northern Light Maine Coast Hospital as a hospital affiliation.
Overview
| NPI | 1033341813 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Aug 13, 2009 |
| Last updated in NPPES | Jun 29, 2021 |
| Certified by provider | Jun 29, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | MD19406 | ME |
| Student in an Organized Health Care Education/Training Program | 390200000X | MT194315 | PA |
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 - General Practice (ME); Practitioner - Hospitalist (ME) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 128 |
|---|---|
| Services billed | 340 across 19 procedure codes |
| Paid by Medicare | $21,117 |
Part D prescriptions in 2024
| Prescriptions (claims) | 186 · 193 30-day fills |
|---|---|
| Patients | 69 |
| Total drug cost | $8,270 |
| Generic share | 91% of claims |
Education and affiliations
| Graduation year | 2001 |
|---|---|
| Medicare specialty | General Practice |
| Secondary specialties | Internal Medicine |
Medical groups
- Hospital Medicine Services of Maine LLCEllsworth, ME · 31 clinicians
- Maine Medical Services LLCEllsworth, ME · 15 clinicians
Hospital affiliation
- Northern Light Maine Coast HospitalEllsworth, ME
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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