Quick answers
- Where does Peter Acker see patients?
- Medicare's clinician data lists 3 practice locations, including Rye, NY, White Plains, NY and Greenwich, CT. Call before your visit to confirm the address.
- What is Peter Acker's specialty?
- Medicare lists Pediatric Medicine as the primary specialty.
- Does Peter Acker accept Medicare assignment?
- Yes. Medicare's clinician data says Peter Acker 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 Peter Acker?
- (914) 848-8888, as listed in official Medicare / NPI Registry data.
- What is Peter Acker's NPI number?
- 1003991308. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Peter Acker is enrolled with Medicare (CMS data updated 2026-10-02).
- 1 Theall RdRye, NY 10580 (914) 848‑8888
- 210 Westchester AveWhite Plains, NY 10604 (914) 682‑0700
- 644 W Putnam AveGreenwich, CT 06830 (203) 622‑0303
Group practices
Medicare enrollment lists Peter Acker as a member of this group (CMS data updated 2026-10-02).
- Westchester Medical Group, P.C415 clinicians in the group
Specialties
- Pediatric Medicineprimary
Other pediatricians in New York
Clinicians with the same Medicare primary specialty in New York — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1982 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1003991308 |
| 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 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