Quick answers
- Does Aaron A. Westreich accept Medicare assignment?
- Yes. Medicare's clinician data says Aaron A. Westreich 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 Aaron A. Westreich see?
- In 2024, CMS data shows 95 Original Medicare patients and 2,554 services for Aaron A. Westreich. This counts Original Medicare only and measures volume, not quality.
- What is Aaron A. Westreich's NPI number?
- 1801329735. 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 Aaron A. Westreich, 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 | 95 |
|---|---|
| Services billed to Medicare | 2,554 |
| Different services or procedures | 15 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Test for allergy using allergenic extract (95004)2,252 services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)38 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)38 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)32 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)12 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%
- Arthritis52%
- Diabetes35%
- Anxiety28%
- Ischemic heart disease26%
Practice locations
Addresses where Aaron A. Westreich is enrolled with Medicare (CMS data updated October 2, 2026).
- 1086 N Broadway, Suite 220Yonkers, NY 10701 (914) 963‑8588
- 70 E Sunrise HwyValley Stream, NY 11581 (516) 355‑0505
Group practices
Medicare enrollment lists Aaron A. Westreich as a member of this group (CMS data updated October 2, 2026).
- Ent and Allergy Associates LLP432 clinicians in the group
Specialties
- Allergy/Immunologyprimary
Other allergist and immunologists in Yonkers
Clinicians with the same Medicare primary specialty in Yonkers, NY — not a recommendation.
Other clinicians in Ent and Allergy Associates LLP
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Maryland School Of Medicine |
| Graduation year | 2017 (9 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1801329735 |
| 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