Quick answers
- Which hospitals does Gregg Pottorff work at?
- Medicare's official clinician data lists Gregg Pottorff at 2 hospitals: Alta Bates Summit Medical Center and Contra Costa Regional Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gregg Pottorff see patients?
- Medicare's clinician data lists 1 practice location in Oakland, CA. Call before your visit to confirm the address.
- What is Gregg Pottorff's specialty?
- Medicare lists Orthopedic Surgery as the primary specialty.
- Does Gregg Pottorff accept Medicare assignment?
- Yes. Medicare's clinician data says Gregg Pottorff 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 Gregg Pottorff?
- (510) 271-4400, as listed in official Medicare / NPI Registry data.
- What is Gregg Pottorff's NPI number?
- 1477520096. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Gregg Pottorff works
Medicare's Facility Affiliation Data lists Gregg Pottorff at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Alta Bates Summit Medical CenterOakland, CA · Acute Care Hospital · CCN 050043
- Contra Costa Regional Medical CenterMartinez, CA · Acute Care Hospital · CCN 050276
Practice locations
Addresses where Gregg Pottorff is enrolled with Medicare (CMS data updated 2026-10-02).
- 3300 Webster St, Suite 1000Oakland, CA 94609 (510) 271‑4400
Group practices
Medicare enrollment lists Gregg Pottorff as a member of this group (CMS data updated 2026-10-02).
- Hill Health Inc a Medical Corporation10 clinicians in the group
Specialties
- Orthopedic Surgeryprimary
Other orthopedic surgeons in Oakland
Clinicians with the same Medicare primary specialty in Oakland, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1986 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1477520096 |
| 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