Brett Diamond, MD
NPI 1619437340 · Radiation Oncology Physician · Boston, MA
Enrolled with Medicare as Practitioner - Radiation Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Brett Diamond, MD is a Radiation Oncology Physician provider in Boston, MA (NPI 1619437340).
Provider details
- NPI number
- 1619437340
- Entity type
- Individual
- Primary specialty
- Radiation Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 1017918 (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
7 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
155 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) |
|---|---|---|
| Calculation of Radiation Therapy Dose77300 | 55 | $35 |
| Radiation Treatment Management, 5 Treatment Sessions77427 | 32 | $204 |
| Design and Construction of Complex Radiation Treatment Device77334 | 22 | $64 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 17 | $191 |
| Complex Radiation Therapy Planning77263 | 15 | $178 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 14 | $102 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2019-03-20
- Last updated
- 2024-07-03
- Certified
- 2024-07-03
Frequently asked questions
- What is Brett Diamond's NPI number?
- Brett Diamond's National Provider Identifier (NPI) is 1619437340, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Brett Diamond's specialty?
- Brett Diamond is listed in the NPPES registry with a primary specialty of Radiation Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Brett Diamond located?
- Brett Diamond's practice location on file with NPPES is 800 Washington St, Boston, MA 02111-1552.
- What is Brett Diamond's phone number?
- The practice phone number listed in the NPPES registry for Brett Diamond is (617) 636-6161.
- Does Brett Diamond accept Medicare?
- Brett Diamond is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Brett Diamond's NPI active?
- Yes — Brett Diamond's NPI (1619437340) is active in the NPPES registry as of the last update on 2024-07-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.