Leigh Rosen, MD
NPI 1235574559 · Obstetrics & Gynecology Physician · Greenwich, CT
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Leigh Rosen, MD is a Obstetrics & Gynecology Physician provider in Greenwich, CT (NPI 1235574559).
Provider details
- NPI number
- 1235574559
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 289496 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
13 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
51 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 21 | $143 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 17 | $187 |
| Biopsy of Lining of Uterus And/Or Removal of Polyp Using an Endoscope58558 | 13 | $262 |
Typical Medicare-allowed amounts for these services range $143–$262 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (2)
- 535 5th AveNew York, NY 10017-3620Phone: (646) 844-9602Fax: (646) 846-2310
- 204 Corlies AvePelham, NY 10803-1904Phone: (646) 846-2310Fax: (646) 846-2310
Registry dates
- Enumerated
- 2013-04-30
- Last updated
- 2025-05-23
- Certified
- 2025-05-23
Frequently asked questions
- What is Leigh Rosen's NPI number?
- Leigh Rosen's National Provider Identifier (NPI) is 1235574559, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Leigh Rosen's specialty?
- Leigh Rosen is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is Leigh Rosen located?
- Leigh Rosen's practice location on file with NPPES is 779 North St, Greenwich, CT 06831-3105.
- What is Leigh Rosen's phone number?
- The practice phone number listed in the NPPES registry for Leigh Rosen is (646) 844-9602.
- Does Leigh Rosen accept Medicare?
- Leigh Rosen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Leigh Rosen's NPI active?
- Yes — Leigh Rosen's NPI (1235574559) is active in the NPPES registry as of the last update on 2025-05-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.