Quick answers
- Where does Carl Johnson see patients?
- Medicare's clinician data lists 2 practice locations, including Washington, DC and Camp Springs, MD. Call before your visit to confirm the address.
- What is Carl Johnson's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Carl Johnson accept Medicare assignment?
- Yes. Medicare's clinician data says Carl Johnson accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does Carl Johnson offer telehealth?
- Medicare's clinician data says Carl Johnson offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Carl Johnson?
- (202) 429-2401, as listed in official Medicare / NPI Registry data.
- What is Carl Johnson's NPI number?
- 1205994266. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Carl Johnson is enrolled with Medicare (CMS data updated 2026-10-02).
- 1145 19th St NW, 311 Mmg at 19th Street NWWashington, DC 20036 (202) 429‑2401
- 5801 Allentown Rd, Suite 510Camp Springs, MD 20746 (301) 899‑0020
Group practices
Medicare enrollment lists Carl Johnson as a member of this group (CMS data updated 2026-10-02).
- MedStar Medical Group II LLC3,767 clinicians in the group
Specialties
- Internal Medicineprimary
Find other Internal Medicine doctors in District of Columbia →
Other internal medicine doctors in Washington
Clinicians with the same Medicare primary specialty in Washington, DC — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | George Washington University School Of Medicine |
| Graduation year | 1991 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1205994266 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians