Independent US Healthcare Provider Directory & Public Medical Database
Active NPI 1770525636 Individual Practitioner Male Practitioner

Dr. John T. Harrison , MD

Internal Medicine • Baltimore, MD

Professional Overview & Biography Verified Profile Summary

Dr. John Harrison, MD is a registered healthcare professional specializing in Internal Medicine in Baltimore, MD. Practice services are available at 2200 KERNAN DR under active NPI credentials.

Practice Location & Contact Primary Location

Practice Address

2200 Kernan Dr

Baltimore, MD 212076665

Telephone 4104482500
Associated Practice Facility / Clinic
🏢 Kernan Dentistry Facility NPI 1942202692

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine in Baltimore, MD

Active Practitioner
Practitioner Clinical Experience
Active
City Avg: 20.3 Yrs
State Avg: 28.1 Yrs
Regional Practice Density
1337 Specialists

Practicing in Baltimore, MD (4114 Statewide)

Telehealth Adoption Rate
21.9% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount
67.4% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Medical Specialties & State Licenses

Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

State License MD D0044635

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.

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

40 Associated Practitioners
Amber Weathers , MS, OTR, L

Occupational Therapist

NPI 1023294428

Master of Science, Occupational Therapist Registered, L

Emily Norris

Physical Therapy Assistant

NPI 1053563627
NPI 1053667295

Doctor of Medicine (M.D.)

Stephanie Bugg

Occupational Therapy Assistant

NPI 1114142908
Dr. Melissa Learned , MD

Physical Medicine & Rehabilitation

NPI 1114360336

Doctor of Medicine (M.D.)

Dr. Charles Berko , MD

Internal Medicine

NPI 1114363819

Doctor of Medicine (M.D.)

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

6 Historical Events
NPI Profile Active July 08, 2007

NPI status registered as active in NPPES database

📍
Updated Practice Location July 08, 2007

Registered at 2200 KERNAN DR, BALTIMORE, MD 212076665 (Tel: 4104482500)

📍
Updated Business Mailing Address July 08, 2007

Registered at 302 WYNDHURST AVE, BALTIMORE, MD 212102409 (Tel: 4104354456)

👤
Provider Name / Credentials Updated July 08, 2007

Recorded as JOHN HARRISON, M.D.

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) July 08, 2007

Internal Medicine (License #D0044635 in MD)

🟢
Initial NPI Registration & Enumeration June 12, 2006

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1770525636
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: June 12, 2006
Last Update: July 13, 2026
Sole Proprietor: No

Mailing Address

302 Wyndhurst Ave

Baltimore, MD 212102409

Phone: 4104354456

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).
⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.