Michael Marshall, MD, PHD
NPI 1356800338 · Anatomic Pathology & Clinical Pathology Physician · Boston, MA
Enrolled with Medicare as Practitioner - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Marshall, MD, PHD is a Anatomic Pathology & Clinical Pathology Physician provider in Boston, MA (NPI 1356800338).
Provider details
- NPI number
- 1356800338
- Entity type
- Individual
- Primary specialty
- Anatomic Pathology & Clinical Pathology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 1014314 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
7 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
346 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Special Stained Specimen Slides to Examine Tissue, Each Additional Procedure88341 | 147 | $26 |
| Pathology Examination of Tissue Using a Microscope, Moderately High Complexity88307 | 76 | $75 |
| Special Stained Specimen Slides to Examine Tissue, Initial Procedure88342 | 48 | $32 |
| Microscopic Genetic Analysis of Tumor, Manual88360 | 30 | $38 |
| Pathology Examination of Specimen During Surgery, First Tissue Block88331 | 29 | $57 |
| Pathology Cytologic Examination of Specimen During Surgery, Each Additional Site88334 | 16 | $34 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$22 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2019-03-18
- Last updated
- 2024-05-20
- Certified
- 2024-05-20
Frequently asked questions
- What is Michael Marshall's NPI number?
- Michael Marshall's National Provider Identifier (NPI) is 1356800338, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Marshall's specialty?
- Michael Marshall is listed in the NPPES registry with a primary specialty of Anatomic Pathology & Clinical Pathology Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Marshall located?
- Michael Marshall's practice location on file with NPPES is 55 Fruit St, Boston, MA 02114-2621.
- What is Michael Marshall's phone number?
- The practice phone number listed in the NPPES registry for Michael Marshall is (314) 409-1180.
- Does Michael Marshall accept Medicare?
- Michael Marshall is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Marshall's NPI active?
- Yes — Michael Marshall's NPI (1356800338) is active in the NPPES registry as of the last update on 2024-05-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.