Quick answers
- Where does Mark McKinnon see patients?
- Medicare's clinician data lists 14 practice locations, including Wheaton, MD, Gaithersburg, MD and Rockville, MD. Call before your visit to confirm the address.
- What is Mark McKinnon's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does Mark McKinnon accept Medicare assignment?
- Yes. Medicare's clinician data says Mark McKinnon 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.
- What is the phone number for Mark McKinnon?
- (301) 942-4505, as listed in official Medicare / NPI Registry data.
- What is Mark McKinnon's NPI number?
- 1235258971. 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 Mark McKinnon is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 14; the Medicare profile lists all.
- 11915 Georgia AveWheaton, MD 20902 (301) 942‑4505
- 12111 Darnestown RdGaithersburg, MD 20878 (301) 926‑3095
- 12220 Rockville PikeRockville, MD 20852 (301) 881‑0103
- 18045 Georgia AveOlney, MD 20832 (301) 774‑8026
- 201 Shorebird St, Suite BFrederick, MD 21701 (240) 422‑8112
Group practices
Medicare enrollment lists Mark McKinnon as a member of this group (CMS data updated 2026-10-02).
- MedStar Urgent Care LLC300 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Wheaton
Clinicians with the same Medicare primary specialty in Wheaton, MD — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2003 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1235258971 |
| 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