Marc Grossman, MD
NPI 1598799025 · Emergency Medicine Physician · Derry, NH
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marc Grossman, MD is a Emergency Medicine Physician provider in Derry, NH (NPI 1598799025).
Provider details
- NPI number
- 1598799025
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 281595 (MA)
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
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
683 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 | 304 | $177 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 238 | $123 |
| Critical Care, First 30-74 Minutes99291 | 129 | $215 |
| Emergency Department Visit With Low Level of Medical Decision Making99283 | 12 | $72 |
Typical Medicare-allowed amounts for these services range $72–$215 (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 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ondansetronbrand: Ondansetron Odt | 50 | 50 |
| Naproxen | 40 | 37 |
| Methylprednisolone | 33 | 33 |
| Tramadol Hcl | 33 | 32 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 27 | 26 |
| Azithromycin | 21 | 21 |
| Doxycycline Hyclate | 20 | 20 |
Practice location
Mailing address
Additional practice locations (2)
- 1 Boston Medical Ctr Pl Fl Place1Boston, MA 02118-2908Phone: (617) 414-5481
- Memorial Hospital3073 White Mountain HwyNorth Conway, NH 03860Phone: (603) 356-5461
Registry dates
- Enumerated
- 2006-07-10
- Last updated
- 2024-10-08
- Certified
- 2024-10-08
Frequently asked questions
- What is Marc Grossman's NPI number?
- Marc Grossman's National Provider Identifier (NPI) is 1598799025, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marc Grossman's specialty?
- Marc Grossman is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Marc Grossman located?
- Marc Grossman's practice location on file with NPPES is 1 Parkland Dr, Derry, NH 03038.
- What is Marc Grossman's phone number?
- The practice phone number listed in the NPPES registry for Marc Grossman is (305) 415-1258.
- Does Marc Grossman accept Medicare?
- Marc Grossman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marc Grossman's NPI active?
- Yes — Marc Grossman's NPI (1598799025) is active in the NPPES registry as of the last update on 2024-10-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.