Quick answers
- Does Alan H. Greenspan accept Medicare assignment?
- Yes. Medicare's clinician data says Alan H. Greenspan accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Alan H. Greenspan see?
- In 2024, CMS data shows 776 Original Medicare patients and 16,295 services for Alan H. Greenspan. This counts Original Medicare only and measures volume, not quality.
- What is Alan H. Greenspan's NPI number?
- 1518913672. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Alan H. Greenspan, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 776 |
|---|---|
| Services billed to Medicare | 16,295 |
| Different services or procedures | 44 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Aminolevulinic acid hcl for topical administration, 10% gel, 10 mg (J7345)13,201 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)687 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)651 services
- Biopsy of related skin growth, first growth (11102)593 services
- Biopsy of related skin growth, each additional growth (11103)347 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol75%
- High blood pressure57%
- Arthritis42%
- Ischemic heart disease27%
- Diabetes24%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)18%
Hospitals where Alan H. Greenspan works
Medicare's Facility Affiliation Data lists Alan H. Greenspan at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- NYU Langone HospitalsNew York, NY · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 330214
Practice locations
Addresses where Alan H. Greenspan is enrolled with Medicare (CMS data updated October 2, 2026).
- 39 Broadway, Rm 3005New York, NY 10006 (212) 509‑5200
- 39 Broadway, Suite 3005New York, NY 10006
Specialties
- Dermatologyprimary
Other dermatologists in New York
Clinicians with the same Medicare primary specialty in New York, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Northwestern University Feinberg Medical School |
| Graduation year | 1979 (47 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1518913672 |
| 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 October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- 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