Quick answers
- Which hospitals does Holly Loudon work at?
- Medicare's official clinician data lists Holly Loudon at 2 hospitals: Mount Sinai Beth Israel and Mount Sinai West. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Holly Loudon see patients?
- Medicare's clinician data lists 3 practice locations, including New York, NY. Call before your visit to confirm the address.
- What is Holly Loudon's specialty?
- Medicare lists Obstetrics/Gynecology as the primary specialty.
- Does Holly Loudon accept Medicare assignment?
- Yes. Medicare's clinician data says Holly Loudon 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 Holly Loudon?
- (212) 241-2232, as listed in official Medicare / NPI Registry data.
- What is Holly Loudon's NPI number?
- 1487630570. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Holly Loudon works
Medicare's Facility Affiliation Data lists Holly Loudon at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mount Sinai Beth IsraelNew York, NY · Acute Care Hospital · closed, according to its website · CCN 330169
- Mount Sinai WestNew York, NY · Acute Care Hospital · CCN 330046
Practice locations
Addresses where Holly Loudon is enrolled with Medicare (CMS data updated 2026-10-02).
- 1 Gustave Levy Place, Mount Sinai HospitalNew York, NY 10029 (212) 241‑2232
- 1000 10th AveNew York, NY 10019 (212) 523‑4000
- 325 W 15th StNew York, NY 10011 (212) 844‑5729
Group practices
Medicare enrollment lists Holly Loudon as a member of this group (CMS data updated 2026-10-02).
- Icahn School of Medicine at Mount Sinai2,843 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in New York
Clinicians with the same Medicare primary specialty in New York, NY — not a recommendation.
Clinician information
| Graduation year | 1998 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1487630570 |
| 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