Quick answers
- Which hospitals does Mary H. Sine work at?
- Medicare's official clinician data lists Mary H. Sine at 2 hospitals: Holy Cross Hospital and Sibley Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mary H. Sine see patients?
- Medicare's clinician data lists 3 practice locations, including Silver Spring, MD and Rockville, MD. Call before your visit to confirm the address.
- What is Mary H. Sine's specialty?
- Medicare lists Obstetrics/Gynecology as the primary specialty.
- Does Mary H. Sine accept Medicare assignment?
- Yes. Medicare's clinician data says Mary H. Sine 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 Mary H. Sine offer telehealth?
- Medicare's clinician data says Mary H. Sine offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Mary H. Sine?
- (301) 681-9101, as listed in official Medicare / NPI Registry data.
- What is Mary H. Sine's NPI number?
- 1750372017. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mary H. Sine works
Medicare's Facility Affiliation Data lists Mary H. Sine at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Holy Cross HospitalSilver Spring, MD · Acute Care Hospital · CCN 210004
- Sibley Memorial HospitalWashington, DC · Acute Care Hospital · CCN 090005
Practice locations
Addresses where Mary H. Sine is enrolled with Medicare (CMS data updated 2026-10-02).
- 10313 Georgia Ave, Suite 202Silver Spring, MD 20902 (301) 681‑9101
- 1500 Forest Glen RdSilver Spring, MD 20910 (301) 754‑7000
- 15225 Shady Grove Rd, Suite 306Rockville, MD 20850 (301) 869‑7644
Group practices
Medicare enrollment lists Mary H. Sine as a member of these groups (CMS data updated 2026-10-02).
- Capital Womens Care LLC281 clinicians in the group
- Professional Services of Holy Cross158 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in Silver Spring
Clinicians with the same Medicare primary specialty in Silver Spring, MD — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Georgetown University School Of Medicine |
| Graduation year | 1993 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1750372017 |
| 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