Stephen Marsh, M.D.
NPI 1528453008 · Family Medicine Physician · Boston, MA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Marsh, M.D. is a Family Medicine Physician provider in Boston, MA (NPI 1528453008).
Provider details
- NPI number
- 1528453008
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 264302 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
11 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
118 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 54 | $124 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 46 | $102 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 18 | $121 |
Typical Medicare-allowed amounts for these services range $102–$124 (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 · 51 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 170 | 47 |
| Amlodipine Besylate | 120 | 36 |
| Tamsulosin Hcl | 100 | 18 |
| Fluticasone Propionate | 96 | 24 |
| Lisinopril | 96 | 28 |
| Metformin Hcl | 69 | 20 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa |
Practice location
Mailing address
Registry dates
- Enumerated
- 2015-04-01
- Last updated
- 2019-02-20
Frequently asked questions
- What is Stephen Marsh's NPI number?
- Stephen Marsh's National Provider Identifier (NPI) is 1528453008, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Marsh's specialty?
- Stephen Marsh is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen Marsh located?
- Stephen Marsh's practice location on file with NPPES is 1 Boston Medical Ctr Pl, Boston, MA 02118-2908.
- What is Stephen Marsh's phone number?
- The practice phone number listed in the NPPES registry for Stephen Marsh is (617) 414-6239.
- Does Stephen Marsh accept Medicare?
- Stephen Marsh is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Marsh's NPI active?
- Yes — Stephen Marsh's NPI (1528453008) is active in the NPPES registry as of the last update on 2019-02-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.