Jonathan Efron, M.D.
NPI 1538144647 · Surgery Physician · Baltimore, MD
Enrolled with Medicare as Practitioner - Colorectal Surgery (proctology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jonathan Efron, M.D. is a Surgery Physician provider in Baltimore, MD (NPI 1538144647).
Provider details
- NPI number
- 1538144647
- Entity type
- Individual
- Primary specialty
- Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 33553 (AZ)
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
- 2005-12-12
- Last updated
- 2014-02-10
Frequently asked questions
- What is Jonathan Efron's NPI number?
- Jonathan Efron's National Provider Identifier (NPI) is 1538144647, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jonathan Efron's specialty?
- Jonathan Efron is listed in the NPPES registry with a primary specialty of Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Jonathan Efron located?
- Jonathan Efron's practice location on file with NPPES is 4940 Eastern Ave, Baltimore, MD 21224-2735.
- What is Jonathan Efron's phone number?
- The practice phone number listed in the NPPES registry for Jonathan Efron is (410) 550-0100.
- Does Jonathan Efron accept Medicare?
- Jonathan Efron is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jonathan Efron's NPI active?
- Yes — Jonathan Efron's NPI (1538144647) is active in the NPPES registry as of the last update on 2014-02-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.