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John Harney, M.D.
NPI 1235272121 · Internal Medicine Physician · Baltimore, MD
John Harney, M.D. is a Internal Medicine Physician provider in Baltimore, MD (NPI 1235272121).
Provider details
- NPI number
- 1235272121
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- D0021716 (MD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(90/100 index)
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
4000 Annapolis Rd
Suite 202
Baltimore, MD 21227-3600
Phone: (410) 636-9999
Fax: (410) 636-6152
Street-level locationGet directions
Mailing address
4000 Annapolis Rd
Baltimore, MD 21227-3600
Registry dates
- Enumerated
- 2007-02-14
- Last updated
- 2023-03-07
Frequently asked questions
- What is John Harney's NPI number?
- John Harney's National Provider Identifier (NPI) is 1235272121, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Harney's specialty?
- John Harney is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Harney located?
- John Harney's practice location on file with NPPES is 4000 Annapolis Rd, Baltimore, MD 21227-3600.
- What is John Harney's phone number?
- The practice phone number listed in the NPPES registry for John Harney is (410) 636-9999.
- Is John Harney's NPI active?
- Yes — John Harney's NPI (1235272121) is active in the NPPES registry as of the last update on 2023-03-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.