James Lock, MD
NPI 1396736781 · Pediatric Cardiology Physician · Boston, MA
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Lock, MD is a Pediatric Cardiology Physician provider in Boston, MA (NPI 1396736781).
Provider details
- NPI number
- 1396736781
- Entity type
- Individual
- Primary specialty
- Pediatric Cardiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 52889 (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
20 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
- 2005-11-03
- Last updated
- 2016-09-23
Frequently asked questions
- What is James Lock's NPI number?
- James Lock's National Provider Identifier (NPI) is 1396736781, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Lock's specialty?
- James Lock is listed in the NPPES registry with a primary specialty of Pediatric Cardiology Physician (Allopathic & Osteopathic Physicians).
- Where is James Lock located?
- James Lock's practice location on file with NPPES is 300 Longwood Ave, Boston, MA 02115-5724.
- What is James Lock's phone number?
- The practice phone number listed in the NPPES registry for James Lock is (617) 355-2793.
- Does James Lock accept Medicare?
- James Lock is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Lock's NPI active?
- Yes — James Lock's NPI (1396736781) is active in the NPPES registry as of the last update on 2016-09-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.