Quick answers
- Does Ian F. Ausubel accept Medicare assignment?
- Yes. Medicare's clinician data says Ian F. Ausubel 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 Ian F. Ausubel see?
- In 2024, CMS data shows 128 Original Medicare patients and 3,460 services for Ian F. Ausubel. This counts Original Medicare only and measures volume, not quality.
- What is Ian F. Ausubel's NPI number?
- 1588673552. 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 Ian F. Ausubel, 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 | 128 |
|---|---|
| Services billed to Medicare | 3,460 |
| Different services or procedures | 30 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Telephone medical discussion with physician, 5-10 minutes (99441)712 services
- Insertion of needle into vein for collection of blood sample (36415)311 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)255 services
- Blood count, hemoglobin (85018)254 services
- Blood glucose (sugar) level (82947)236 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 blood pressure75%
- High cholesterol75%
- Diabetes75%
- Ischemic heart disease73%
- Arthritis34%
- Chronic kidney disease20%
Practice locations
Addresses where Ian F. Ausubel is enrolled with Medicare (CMS data updated October 2, 2026).
- 509 W Merrick RdValley Stream, NY 11580
- 509 W Merrick Rd, Suite 101Valley Stream, NY 11580 (516) 561‑8188
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Valley Stream
Clinicians with the same Medicare primary specialty in Valley Stream, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Northwestern University Feinberg Medical School |
| Graduation year | 1992 (34 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1588673552 |
| 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
- 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