James Heffernan, M.D.
NPI 1366578940 · Internal Medicine Physician · Boston, MA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Heffernan, M.D. is a Internal Medicine Physician provider in Boston, MA (NPI 1366578940).
Provider details
- NPI number
- 1366578940
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 47543 (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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-02-26
- Last updated
- 2009-09-09
Frequently asked questions
- What is James Heffernan's NPI number?
- James Heffernan's National Provider Identifier (NPI) is 1366578940, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Heffernan's specialty?
- James Heffernan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is James Heffernan located?
- James Heffernan's practice location on file with NPPES is Beth Israel Deaconess Medical Center, Boston, MA 02215.
- What is James Heffernan's phone number?
- The practice phone number listed in the NPPES registry for James Heffernan is (617) 667-9600.
- Does James Heffernan accept Medicare?
- James Heffernan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Heffernan's NPI active?
- Yes — James Heffernan's NPI (1366578940) is active in the NPPES registry as of the last update on 2009-09-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.