Matthew Karim
NPI 1043798598 · Certified Registered Nurse Anesthetist · San Francisco, CA
Enrolled with Medicare as Practitioner - Certified Registered Nurse Anesthetist (crna) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Matthew Karim is a Certified Registered Nurse Anesthetist provider in San Francisco, CA (NPI 1043798598).
Provider details
- NPI number
- 1043798598
- Entity type
- Individual
- Primary specialty
- Certified Registered Nurse AnesthetistPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Male
- Sole proprietor
- Yes
- License
- 124698 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
7 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
24 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) |
|---|---|---|
| Anesthesia for Extensive Surgery on Spine00670 | 12 | $311 |
| Anesthesia for Other Procedure on Esophagus, Stomach, Or Upper Small Bowel Using an Endoscope00731 | 12 | $103 |
Typical Medicare-allowed amounts for these services range $103–$311 (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
Registry dates
- Enumerated
- 2018-08-06
- Last updated
- 2023-08-01
- Certified
- 2023-08-01
Frequently asked questions
- What is Matthew Karim's NPI number?
- Matthew Karim's National Provider Identifier (NPI) is 1043798598, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Matthew Karim's specialty?
- Matthew Karim is listed in the NPPES registry with a primary specialty of Certified Registered Nurse Anesthetist (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Matthew Karim located?
- Matthew Karim's practice location on file with NPPES is 505 Parnassus Ave, San Francisco, CA 94143-2204.
- What is Matthew Karim's phone number?
- The practice phone number listed in the NPPES registry for Matthew Karim is (415) 476-1000.
- Does Matthew Karim accept Medicare?
- Matthew Karim is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Matthew Karim's NPI active?
- Yes — Matthew Karim's NPI (1043798598) is active in the NPPES registry as of the last update on 2023-08-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.