Harrison Tsai, M.D.
NPI 1164845343 · Molecular Genetic Pathology (Pathology) Physician · Boston, MA
Enrolled with Medicare as Practitioner - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Harrison Tsai, M.D. is a Molecular Genetic Pathology (Pathology) Physician provider in Boston, MA (NPI 1164845343).
Provider details
- NPI number
- 1164845343
- Entity type
- Individual
- Primary specialty
- Molecular Genetic Pathology (Pathology) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 282556 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
12 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
492 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) |
|---|---|---|
| Molecular Pathology Procedure; Physician Interpretation and ReportG0452 | 492 | $48 |
Typical Medicare-allowed amounts for these services range $48–$48 (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.
Practice location
Mailing address
Additional practice locations (2)
- 55 Fruit StBoston, MA 02114-2621Phone: (617) 726-2967
- 75 Francis StBrigham and Women'S Hospital; Department of PathologyBoston, MA 02115-6110Phone: (617) 732-8613
Registry dates
- Enumerated
- 2014-01-24
- Last updated
- 2026-05-01
- Certified
- 2026-05-01
Frequently asked questions
- What is Harrison Tsai's NPI number?
- Harrison Tsai's National Provider Identifier (NPI) is 1164845343, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Harrison Tsai's specialty?
- Harrison Tsai is listed in the NPPES registry with a primary specialty of Molecular Genetic Pathology (Pathology) Physician (Allopathic & Osteopathic Physicians).
- Where is Harrison Tsai located?
- Harrison Tsai's practice location on file with NPPES is 300 Longwood Ave, Boston, MA 02115-5724.
- What is Harrison Tsai's phone number?
- The practice phone number listed in the NPPES registry for Harrison Tsai is (617) 355-6000.
- Does Harrison Tsai accept Medicare?
- Harrison Tsai is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Harrison Tsai's NPI active?
- Yes — Harrison Tsai's NPI (1164845343) is active in the NPPES registry as of the last update on 2026-05-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.