Quick answers
- Which hospitals does Gregory Hollis work at?
- Medicare's official clinician data lists Gregory Hollis at 1 hospital: MedStar Washington Hospital Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gregory Hollis see patients?
- Medicare's clinician data lists 7 practice locations, including Kensington, MD, Wheaton, MD and Washington, DC. Call before your visit to confirm the address.
- What is Gregory Hollis's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does Gregory Hollis accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory Hollis 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 Gregory Hollis?
- (301) 949-0030, as listed in official Medicare / NPI Registry data.
- What is Gregory Hollis's NPI number?
- 1174308126. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Gregory Hollis works
Medicare's Facility Affiliation Data lists Gregory Hollis at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- MedStar Washington Hospital CenterWashington, DC · Acute Care Hospital · CCN 090011
Practice locations
Addresses where Gregory Hollis is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 7; the Medicare profile lists all.
- 10540 Connecticut AveKensington, MD 20895 (301) 949‑0030
- 11915 Georgia AveWheaton, MD 20902 (301) 942‑4505
- 1310 Southern Ave SEWashington, DC 20032 (202) 574‑7222
- 13428 New Hampshire AveSilver Spring, MD 20904 (301) 384‑5010
- 1500 Galen St SEWashington, DC 20020 (202) 610‑7160
Group practices
Medicare enrollment lists Gregory Hollis as a member of these groups (CMS data updated 2026-10-02).
- MedStar Urgent Care LLC300 clinicians in the group
- Comprehensive Primary Care and Associates LLC171 clinicians in the group
- Unity Health Care Inc.151 clinicians in the group
- Crescent Urgent Health Care Services, LLC12 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Kensington
Clinicians with the same Medicare primary specialty in Kensington, MD — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2024 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1174308126 |
| 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