Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mr. John Harney, M.D.

Internal Medicine Physician in Baltimore, MD · enumerated 2007 · practices at John C. Fiastro, D.D.S..

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1235272121

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Registry record

Entity type Individual (Type 1)

Name Mr. John Harney

Credential M.D.

Sex Male

Practice address Baltimore, MD, 21227

Phone (410) 636-9999

Fax (410) 636-6152

Enumeration date Feb 14, 2007

Last updated in NPPES Mar 7, 2023

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License D0021716 (MD) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
02238011	Other	-	UNITED HEALTHCARE MA
M10796	Other	-	CDS NUMBER
P1024A	Other	-	COVENTRY
07273	Other	-	AMERIGROUP
505807	Other	-	US HEALTH
D0021716	Other	-	LICENSE NUMBER
E2600001	Other	-	BLUE CHOICE
5093453	Other	-	AETNA
1378470R	Other	-	FIRST HEALTH
813596	Other	-	MAMSI OPT CHS MDIPA
000157156 0400181	Other	-	UNITED HEALTHCARE
K697HA	Other	-	BCBS

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Is NPI 1235272121 active?

Yes, as of the latest NPPES snapshot, NPI 1235272121 is active (record last updated 2023-03-07).

How do I verify John Harney's NPI record?

Cross-check NPI 1235272121 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Geetanjali Narayen Pediatrics Physician · Baltimore, MD NPI 1821099185 Jorge Calderon Public Health & General Preventive Medicine Physician · Baltimore, MD NPI 1114981164 Anwar Mumtaz Otolaryngology Physician · Baltimore, MD NPI 1639281736 John C. Fiastro, D.D.S. General Practice Dentistry · Baltimore, MD NPI 1295807865 Eva Fiastro General Practice Dentistry · Baltimore, MD NPI 1528110731 John Fiastro General Practice Dentistry · Baltimore, MD NPI 1467504381 Martha Benson Physician Assistant · Baltimore, MD NPI 1639314065

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-03-07.