Mark Hammer, M.D.
NPI 1578884003 · Diagnostic Radiology Physician · Boston, MA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Hammer, M.D. is a Diagnostic Radiology Physician provider in Boston, MA (NPI 1578884003).
Provider details
- NPI number
- 1578884003
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 265846 (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
16 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
8,827 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) |
|---|---|---|
| X-Ray of Chest, 1 View71045 | 2,927 | $9 |
| X-Ray of Chest, 2 Views71046 | 1,946 | $11 |
| Ct Scan of Chest Without Contrast71250 | 1,251 | $53 |
| Ct Scan of Chest With Contrast71260 | 964 | $55 |
| X-Ray of Chest, 2 Views71046 | 758 | $12 |
| Ct Scan of Chest With Contrast71260 | 324 | $55 |
| Ct Scan of Chest Without Contrast71250 | 302 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-06-18
- Last updated
- 2026-05-29
- Certified
- 2026-05-29
Frequently asked questions
- What is Mark Hammer's NPI number?
- Mark Hammer's National Provider Identifier (NPI) is 1578884003, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Hammer's specialty?
- Mark Hammer is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Hammer located?
- Mark Hammer's practice location on file with NPPES is 55 Fruit St, Boston, MA 02114-2621.
- What is Mark Hammer's phone number?
- The practice phone number listed in the NPPES registry for Mark Hammer is (617) 726-2000.
- Does Mark Hammer accept Medicare?
- Mark Hammer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Hammer's NPI active?
- Yes — Mark Hammer's NPI (1578884003) is active in the NPPES registry as of the last update on 2026-05-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.