Jonathan Grammer, MD
NPI 1003375189 · Emergency Medicine Physician · Brunswick, ME
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Provider details
- NPI number
- 1003375189
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD25342 (ME)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
7 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
315 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 179 | $163 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 79 | $112 |
| Emergency Department Visit With Low Level of Medical Decision Making99283 | 31 | $66 |
| Critical Care, First 30-74 Minutes99291 | 26 | $197 |
Typical Medicare-allowed amounts for these services range $66–$197 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cephalexin | 40 | 40 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 33 | 33 |
| Prednisone | 32 | 32 |
| Ondansetronbrand: Ondansetron Odt | 24 | 24 |
| Doxycycline Hyclate | 18 | 17 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 15 | 15 |
| Azithromycin | 14 |
Practice location
Mailing address
Additional practice locations (3)
- 22 Station Ave Ste 102Brunswick, ME 04011-2092Phone: (207) 406-7500Fax: (207) 618-5674
- 50 Union StEllsworth, ME 04605-1534Phone: (207) 664-5311
- 1 Medical Center DrMorgantown, WV 26506-1200Phone: (304) 293-2436Fax: (304) 293-6702
Registry dates
- Enumerated
- 2019-03-18
- Last updated
- 2026-04-06
- Certified
- 2026-04-06
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.