Quick answers
- Where does Henry Zwally see patients?
- Medicare's clinician data lists 3 practice locations, including Waldorf, MD, Glen Burnie, MD and Silver Spring, MD. Call before your visit to confirm the address.
- What is Henry Zwally's specialty?
- Medicare lists Emergency Medicine as the primary specialty, and also Internal Medicine.
- Does Henry Zwally accept Medicare assignment?
- Yes. Medicare's clinician data says Henry Zwally 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 Henry Zwally?
- (240) 427-1926, as listed in official Medicare / NPI Registry data.
- What is Henry Zwally's NPI number?
- 1669408936. 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 Henry Zwally is enrolled with Medicare (CMS data updated 2026-10-02).
- 2855 Crain HwyWaldorf, MD 20601 (240) 427‑1926
- 7116 Ritchie HwyGlen Burnie, MD 21061 (443) 577‑0277
- 8206 Georgia AveSilver Spring, MD 20910 (301) 960‑4682
Group practices
Medicare enrollment lists Henry Zwally as a member of this group (CMS data updated 2026-10-02).
- Patient First Maryland Medical Group PLLC254 clinicians in the group
Specialties
- Emergency Medicineprimary
- Internal Medicinealso
Other emergency medicine doctors in Maryland
Clinicians with the same Medicare primary specialty in Maryland — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Maryland School Of Medicine |
| Graduation year | 1990 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1669408936 |
| 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