Quick answers
- Which hospitals does Hyung S. Ryu work at?
- Medicare's official clinician data lists Hyung S. Ryu at 4 hospitals: Calverthealth Medical Center, MedStar Saint Mary's Hospital, Mercy Medical Center Inc and Saint Agnes Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Hyung S. Ryu see patients?
- Medicare's clinician data lists 1 practice location in Baltimore, MD. Call before your visit to confirm the address.
- What is Hyung S. Ryu's specialty?
- Medicare lists Gynecological Oncology as the primary specialty.
- Does Hyung S. Ryu accept Medicare assignment?
- Yes. Medicare's clinician data says Hyung S. Ryu 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 Hyung S. Ryu?
- (410) 332-9000, as listed in official Medicare / NPI Registry data.
- What is Hyung S. Ryu's NPI number?
- 1508929506. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Hyung S. Ryu works
Medicare's Facility Affiliation Data lists Hyung S. Ryu at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Calverthealth Medical CenterPrince Frederick, MD · Acute Care Hospital · CCN 210039
- MedStar Saint Mary's HospitalLeonardtown, MD · Acute Care Hospital · CCN 210028
- Mercy Medical Center IncBaltimore, MD · Acute Care Hospital · CCN 210008
- Saint Agnes HospitalBaltimore, MD · Acute Care Hospital · CCN 210011
Practice locations
Addresses where Hyung S. Ryu is enrolled with Medicare (CMS data updated 2026-10-02).
- 227 Saint Paul StBaltimore, MD 21202 (410) 332‑9000
Group practices
Medicare enrollment lists Hyung S. Ryu as a member of this group (CMS data updated 2026-10-02).
- St Paul Place Specialists, Inc.336 clinicians in the group
Specialties
- Gynecological Oncologyprimary
Other gynecologic oncologists in Baltimore
Clinicians with the same Medicare primary specialty in Baltimore, MD — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Georgetown University School Of Medicine |
| Graduation year | 2001 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1508929506 |
| 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