Quick answers
- Which hospitals does James P. Grenert work at?
- Medicare's official clinician data lists James P. Grenert at 2 hospitals: UCSF Medical Center and Zuckerberg San Francisco General Hospital & Trauma Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does James P. Grenert see patients?
- Medicare's clinician data lists 2 practice locations, including San Francisco, CA. Call before your visit to confirm the address.
- What is James P. Grenert's specialty?
- Medicare lists Pathology as the primary specialty.
- Does James P. Grenert accept Medicare assignment?
- Yes. Medicare's clinician data says James P. Grenert 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 James P. Grenert?
- (628) 206-8212, as listed in official Medicare / NPI Registry data.
- What is James P. Grenert's NPI number?
- 1174572390. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where James P. Grenert works
Medicare's Facility Affiliation Data lists James P. Grenert at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- UCSF Medical CenterSan Francisco, CA · Acute Care Hospital · CCN 050454
- Zuckerberg San Francisco General Hospital & Trauma CenterSan Francisco, CA · Acute Care Hospital · CCN 050228
Practice locations
Addresses where James P. Grenert is enrolled with Medicare (CMS data updated 2026-10-02).
- 1001 Potrero AveSan Francisco, CA 94110 (628) 206‑8212
- 400 Parnassus Ave, McB300San Francisco, CA 94143 (415) 476‑1000
Group practices
Medicare enrollment lists James P. Grenert as a member of these groups (CMS data updated 2026-10-02).
- University of California San Francisco1,839 clinicians in the group
- University of California SFGH Medical Group587 clinicians in the group
Specialties
- Pathologyprimary
Other pathologists in San Francisco
Clinicians with the same Medicare primary specialty in San Francisco, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Mayo Medical School |
| Graduation year | 2000 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1174572390 |
| 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