Quick answers
- Which hospitals does Peter Ackerman work at?
- Medicare's official clinician data lists Peter Ackerman at 3 hospitals: Kaiser Foundation Hospital - Antioch, Kaiser Foundation Hospital - Walnut Creek and White Plains Hospital Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Peter Ackerman see patients?
- Medicare's clinician data lists 2 practice locations, including Walnut Creek, CA and White Plains, NY. Call before your visit to confirm the address.
- What is Peter Ackerman's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does Peter Ackerman accept Medicare assignment?
- Yes. Medicare's clinician data says Peter Ackerman 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.
- Does Peter Ackerman offer telehealth?
- Medicare's clinician data says Peter Ackerman offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Peter Ackerman?
- (925) 295-4000, as listed in official Medicare / NPI Registry data.
- What is Peter Ackerman's NPI number?
- 1427435023. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Peter Ackerman works
Medicare's Facility Affiliation Data lists Peter Ackerman at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Kaiser Foundation Hospital - AntiochAntioch, CA · Acute Care Hospital · CCN 050760
- Kaiser Foundation Hospital - Walnut CreekWalnut Creek, CA · Acute Care Hospital · CCN 050072
- White Plains Hospital CenterWhite Plains, NY · Acute Care Hospital · CCN 330304
Practice locations
Addresses where Peter Ackerman is enrolled with Medicare (CMS data updated 2026-10-02).
- 1425 S Main StWalnut Creek, CA 94596 (925) 295‑4000
- 41 E Post RdWhite Plains, NY 10601 (914) 681‑0600
Group practices
Medicare enrollment lists Peter Ackerman as a member of these groups (CMS data updated 2026-10-02).
- Permanente Medical Group Inc10,996 clinicians in the group
- East Post Road Medical Services PC429 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Walnut Creek
Clinicians with the same Medicare primary specialty in Walnut Creek, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2015 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1427435023 |
| 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 2026-10-02, retrieved 2026-10-29
- 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