Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Carl Johnson, MD

Individual provider Internal Medicine Physician · NPI 1205994266

Dr. Carl Johnson, MD is an Internal Medicine in Largo, Maryland. Graduated from George Washington University School of Medicine in 1991, 35 years ago. Practices with Medstar Medical Group II LLC, a 3,717-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Maryland.

Years since qualifying
35
Trained at
George Washington University School of Medicine
Licensed in
MD
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

1221 Mercantile Ln
Largo, MD 20774-5374
Phone: (301) 618-5540
Fax: (301) 618-5525
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence D45881 (MD)

Record details

NPI number1205994266
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 4, 2006
Last updated in NPPESJuly 8, 2007
Mailing addressKaiser Permanente Mid Atlantic Permanente Medical Group, 2101 E Jefferson St Ppqa Medicare Compliance Unit 6 W, Rockville, MD 20852-4908

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolGEORGE WASHINGTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 1991 (35 years in practice)
Group practice Medstar Medical Group Ii Llc — 3717 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

Other providers in Largo