Frank Primus, M.D.
NPI 1366734618 · Internal Medicine Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - General Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Frank Primus, M.D. is a Internal Medicine Physician provider in San Francisco, CA (NPI 1366734618).
Provider details
- NPI number
- 1366734618
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A114110 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
15 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
759 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) |
|---|---|---|
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 229 | $124 |
| Removal of Skin and Tissue, 20.0 Sq Cm Or Less11042 | 184 | $158 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 163 | $124 |
| Removal of Skin and Tissue, 20.0 Sq Cm Or Less11042 | 102 | $67 |
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More99308 | 42 | $86 |
| Initial Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 35 Minutes99305 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-05-04
- Last updated
- 2026-01-29
- Certified
- 2026-01-29
Frequently asked questions
- What is Frank Primus's NPI number?
- Frank Primus's National Provider Identifier (NPI) is 1366734618, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Frank Primus's specialty?
- Frank Primus is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Frank Primus located?
- Frank Primus's practice location on file with NPPES is 109 S Lake Merced Hls Apt 3b, San Francisco, CA 94132-2923.
- What is Frank Primus's phone number?
- The practice phone number listed in the NPPES registry for Frank Primus is (773) 456-3316.
- Does Frank Primus accept Medicare?
- Frank Primus is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Frank Primus's NPI active?
- Yes — Frank Primus's NPI (1366734618) is active in the NPPES registry as of the last update on 2026-01-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.