Quick answers
- Which hospitals does Grace E. Ahn work at?
- Medicare's official clinician data lists Grace E. Ahn at 1 hospital: Virginia Hospital Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Grace E. Ahn see patients?
- Medicare's clinician data lists 2 practice locations, including Frederick, MD and Rockville, MD. Call before your visit to confirm the address.
- What is Grace E. Ahn's specialty?
- Medicare lists Rheumatology as the primary specialty.
- Does Grace E. Ahn accept Medicare assignment?
- Yes. Medicare's clinician data says Grace E. Ahn 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.
- Does Grace E. Ahn offer telehealth?
- Medicare's clinician data says Grace E. Ahn offers telehealth services. Ask the office which visits can be done by video or phone.
- What is Grace E. Ahn's NPI number?
- 1982884896. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Grace E. Ahn works
Medicare's Facility Affiliation Data lists Grace E. Ahn at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Virginia Hospital CenterArlington, VA · Acute Care Hospital · CCN 490050
Practice locations
Addresses where Grace E. Ahn is enrolled with Medicare (CMS data updated 2026-10-02).
- 161 Thomas Johnson Dr, Suite 250Frederick, MD 21702
- 7361 Calhoun Pl, Suite 600Rockville, MD 20855
Group practices
Medicare enrollment lists Grace E. Ahn as a member of this group (CMS data updated 2026-10-02).
- Arthritis and Rheumatism Associates PC50 clinicians in the group
Specialties
- Rheumatologyprimary
Other rheumatologists in Frederick
Clinicians with the same Medicare primary specialty in Frederick, MD — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Virginia School Of Medicine |
| Graduation year | 2006 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1982884896 |
| 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