Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. JOHN T. HARRISON M.D.
NPI 1770525636
Internal Medicine in Baltimore, MD

Active since June 12, 2006
2200 KERNAN DR, BALTIMORE, MD 21207(410) 448-2500 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. John T. Harrison M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. JOHN T. HARRISON M.D. (NPI 1770525636) is an individual internal medicine provider in Baltimore, Maryland, licensed in Maryland (D0044635) and active in the NPI registry since June 2006.

NPPES Registry Identity

NPI1770525636
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. JOHN T. HARRISONCredential: M.D.
Location Address2200 KERNAN DRBaltimore, MD 21207-6665
Mailing Address302 Wyndhurst AveBaltimore, MD 21210-2409 · (410) 435-4456
Sole ProprietorNo
Enumeration DateJune 12, 2006
Last NPPES UpdateJuly 13, 2026
NPI 1770525636 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License Licensed in MD · D0044635
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
2200 KERNAN DR, Baltimore, MD 21207

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Physical Therapist
2200 KERNAN DR
BALTIMORE, MD 21207
Occupational Therapist
2200 KERNAN DR
GWYNN OAK, MD 21207
Orthopaedic Surgery
2200 KERNAN DR
BALTIMORE, MD 21207
Dentist (Pediatric Dentistry)
2200 KERNAN DR
BALTIMORE, MD 21207
Physician Assistant (Surgical)
2200 KERNAN DR
BALTIMORE, MD 21207
Occupational Therapist
2200 KERNAN DR
BALTIMORE, MD 21207
Occupational Therapist
2200 KERNAN DR
BALTIMORE, MD 21207
Specialist
2200 KERNAN DR
BALTIMORE, MD 21207

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is John Harrison's NPI number?

The NPI number for John Harrison is 1770525636. It was assigned to this individual provider in the NPPES registry on June 12, 2006.

Where is John Harrison located?

John Harrison practices at 2200 Kernan Dr, Baltimore, MD 21207. The listed phone number is (410) 448-2500.

What is John Harrison's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

When was this NPI record last updated?

The NPPES record for John Harrison was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 26 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.