Quick answers
- Which hospitals does John Thomas work at?
- Medicare's official clinician data lists John Thomas at 2 hospitals: Hackensack Meridian Mountainside Medical and MedStar Georgetown University Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John Thomas see patients?
- Medicare's clinician data lists 1 practice location in Washington, DC. Call before your visit to confirm the address.
- What is John Thomas's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does John Thomas accept Medicare assignment?
- Yes. Medicare's clinician data says John Thomas 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 John Thomas?
- (202) 429-2401, as listed in official Medicare / NPI Registry data.
- What is John Thomas's NPI number?
- 1881969194. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John Thomas works
Medicare's Facility Affiliation Data lists John Thomas at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Hackensack Meridian Mountainside MedicalMontclair, NJ · Acute Care Hospital · CCN 310054
- MedStar Georgetown University HospitalWashington, DC · Acute Care Hospital · CCN 090004
Practice locations
Addresses where John Thomas 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
Group practices
Medicare enrollment lists John Thomas 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 | Yale University School Of Medicine |
| Graduation year | 2012 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1881969194 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- 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