Quick answers
- Does John Robyn V. Diez accept Medicare assignment?
- Yes. Medicare's clinician data says John Robyn V. Diez accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- What is John Robyn V. Diez's NPI number?
- 1942881909. 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 John Robyn V. Diez is enrolled with Medicare (CMS data updated October 2, 2026).
- 69 Wolf Acres DrOakland, MD 21550 (301) 533‑2190
Group practices
Medicare enrollment lists John Robyn V. Diez as a member of this group (CMS data updated October 2, 2026).
- Specialty Physicians of Garrett County, LLC91 clinicians in the group
Specialties
- Addiction Medicineprimary
Other addiction medicine doctors in Maryland
Clinicians with the same Medicare primary specialty in Maryland — not a recommendation.
Other clinicians in Specialty Physicians of Garrett County, LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2014 (12 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1942881909 |
| 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 October 2, 2026, retrieved October 29, 2026
- 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