Quick answers
- Where does Mark Ritter see patients?
- Medicare's clinician data lists 2 practice locations, including Silver Spring, MD and Rockville, MD. Call before your visit to confirm the address.
- What is Mark Ritter's specialty?
- Medicare lists Psychiatry as the primary specialty.
- Does Mark Ritter accept Medicare assignment?
- Yes. Medicare's clinician data says Mark Ritter 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 Ritter?
- (240) 637-4000, as listed in official Medicare / NPI Registry data.
- What is Mark Ritter's NPI number?
- 1265579387. 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 Ritter is enrolled with Medicare (CMS data updated 2026-10-02).
- 12100 Plum Orchard DrSilver Spring, MD 20904 (240) 637‑4000
- 9901 Medical Ctr DrRockville, MD 20850 (301) 279‑6000
Group practices
Medicare enrollment lists Mark Ritter as a member of this group (CMS data updated 2026-10-02).
- Adventist Physician Services Inc148 clinicians in the group
Specialties
- Psychiatryprimary
Other psychiatrists in Silver Spring
Clinicians with the same Medicare primary specialty in Silver Spring, MD — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Wayne State University School Of Medicine |
| Graduation year | 2001 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1265579387 |
| 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