Joseph Baker, MD, MPH
NPI 1144338138 · Family Medicine Physician · Boston, MA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joseph Baker, MD, MPH is a Family Medicine Physician provider in Boston, MA (NPI 1144338138).
Provider details
- NPI number
- 1144338138
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, MPH
- Sex
- Male
- Sole proprietor
- No
- License
- 245637 (MA)
Specialties & taxonomies
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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 123 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Oxycodone Hcl | 256 | 31 |
| Atorvastatin Calcium | 237 | 62 |
| Gabapentin | 222 | 44 |
| Bictegrav/Emtricit/Tenofov Alabrand: Biktarvy | 192 | 24 |
| Omeprazole | 146 | 31 |
| Fluticasone Propionate | 137 | 33 |
| Metformin Hclbrand: Metformin Hcl Er |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-29
- Last updated
- 2021-04-25
- Certified
- 2021-04-25
Frequently asked questions
- What is Joseph Baker's NPI number?
- Joseph Baker's National Provider Identifier (NPI) is 1144338138, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joseph Baker's specialty?
- Joseph Baker is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Joseph Baker located?
- Joseph Baker's practice location on file with NPPES is 1340 Boylston St, Boston, MA 02215-4302.
- What is Joseph Baker's phone number?
- The practice phone number listed in the NPPES registry for Joseph Baker is (617) 267-0900.
- Does Joseph Baker accept Medicare?
- Joseph Baker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joseph Baker's NPI active?
- Yes — Joseph Baker's NPI (1144338138) is active in the NPPES registry as of the last update on 2021-04-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.