Quick answers
- Which hospitals does Geralyn C. O'Reilly work at?
- Medicare's official clinician data lists Geralyn C. O'Reilly at 2 hospitals: Mercy Medical Center Inc and University of Maryland Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Geralyn C. O'Reilly see patients?
- Medicare's clinician data lists 2 practice locations, including Baltimore, MD. Call before your visit to confirm the address.
- What is Geralyn C. O'Reilly's specialty?
- Medicare lists Obstetrics/Gynecology as the primary specialty.
- Does Geralyn C. O'Reilly accept Medicare assignment?
- Yes. Medicare's clinician data says Geralyn C. O'Reilly 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 Geralyn C. O'Reilly?
- (410) 659-2800, as listed in official Medicare / NPI Registry data.
- What is Geralyn C. O'Reilly's NPI number?
- 1548348485. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Geralyn C. O'Reilly works
Medicare's Facility Affiliation Data lists Geralyn C. O'Reilly at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mercy Medical Center IncBaltimore, MD · Acute Care Hospital · CCN 210008
- University of Maryland Medical CenterBaltimore, MD · Acute Care Hospital · CCN 210002
Practice locations
Addresses where Geralyn C. O'Reilly is enrolled with Medicare (CMS data updated 2026-10-02).
- 301 Saint Paul StBaltimore, MD 21202 (410) 659‑2800
- 419 W Redwood St, Suite 500Baltimore, MD 21201 (410) 328‑6640
Group practices
Medicare enrollment lists Geralyn C. O'Reilly as a member of these groups (CMS data updated 2026-10-02).
- St Paul Place Specialists, Inc.336 clinicians in the group
- University of Maryland Obstetrical and Gynecological Associates PA43 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in Baltimore
Clinicians with the same Medicare primary specialty in Baltimore, MD — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | New York Medical College |
| Graduation year | 1994 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1548348485 |
| 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