Peter Grayson, MD
NPI 1639195571 · Rheumatology Physician · Boston, MA
Peter Grayson, MD is a Rheumatology Physician provider in Boston, MA (NPI 1639195571).
Provider details
- NPI number
- 1639195571
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 230360 (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 tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-14
- Last updated
- 2012-05-09
Frequently asked questions
- What is Peter Grayson's NPI number?
- Peter Grayson's National Provider Identifier (NPI) is 1639195571, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Peter Grayson's specialty?
- Peter Grayson is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Peter Grayson located?
- Peter Grayson's practice location on file with NPPES is 725 Albany St, Boston, MA 02118-2526.
- What is Peter Grayson's phone number?
- The practice phone number listed in the NPPES registry for Peter Grayson is (617) 638-7460.
- Is Peter Grayson's NPI active?
- Yes — Peter Grayson's NPI (1639195571) is active in the NPPES registry as of the last update on 2012-05-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.