James Grenert, MD
NPI 1174572390 · Anatomic Pathology Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Grenert, MD is a Anatomic Pathology Physician provider in San Francisco, CA (NPI 1174572390).
Provider details
- NPI number
- 1174572390
- Entity type
- Individual
- Primary specialty
- Anatomic Pathology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A78348 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
248 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Molecular Pathology Procedure; Physician Interpretation and ReportG0452 | 188 | $53 |
| Microscopic Genetic Analysis of Tissue, Computer-Assisted Technology, Initial Procedure, Each Multiplex Procedure88374 | 60 | $46 |
Typical Medicare-allowed amounts for these services range $46–$53 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (1)
- 1001 Potrero Ave. Bldg. 3, #201San Francisco, CA 94110-3518Phone: (628) 206-8230
Registry dates
- Enumerated
- 2006-05-06
- Last updated
- 2025-12-09
- Certified
- 2025-12-09
Frequently asked questions
- What is James Grenert's NPI number?
- James Grenert's National Provider Identifier (NPI) is 1174572390, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Grenert's specialty?
- James Grenert is listed in the NPPES registry with a primary specialty of Anatomic Pathology Physician (Allopathic & Osteopathic Physicians).
- Where is James Grenert located?
- James Grenert's practice location on file with NPPES is 505 Parnassus Ave, San Francisco, CA 94143-2204.
- What is James Grenert's phone number?
- The practice phone number listed in the NPPES registry for James Grenert is (415) 353-1613.
- Does James Grenert accept Medicare?
- James Grenert is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Grenert's NPI active?
- Yes — James Grenert's NPI (1174572390) is active in the NPPES registry as of the last update on 2025-12-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.