Brett Mathieson, MD
NPI 1538112339 · Anesthesiology Physician · Marysville, CA
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Brett Mathieson, MD is a Anesthesiology Physician provider in Marysville, CA (NPI 1538112339).
Provider details
- NPI number
- 1538112339
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G76823 (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
20 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
296 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 Exam of Colon Using an Endoscope00812 | 49 | $96 |
| Anesthesia for Lens Surgery00142 | 40 | $130 |
| Anesthesia for Other Procedure on Large Bowel Using an Endoscope00811 | 35 | $121 |
| Anesthesia for Other Procedure on Esophagus, Stomach, Or Upper Small Bowel Using an Endoscope00731 | 30 | $139 |
| Injection of Substance Into Lower Spine Canal62322 | 30 | $77 |
| Injection of Anesthetic Agent And/Or Steroid Into Thigh Nerve (femoral Nerve)64447 | 29 | $39 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-19
- Last updated
- 2016-12-29
Frequently asked questions
- What is Brett Mathieson's NPI number?
- Brett Mathieson's National Provider Identifier (NPI) is 1538112339, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Brett Mathieson's specialty?
- Brett Mathieson is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is Brett Mathieson located?
- Brett Mathieson's practice location on file with NPPES is 726 4th St, Marysville, CA 95901-5656.
- What is Brett Mathieson's phone number?
- The practice phone number listed in the NPPES registry for Brett Mathieson is (530) 749-4300.
- Does Brett Mathieson accept Medicare?
- Brett Mathieson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Brett Mathieson's NPI active?
- Yes — Brett Mathieson's NPI (1538112339) is active in the NPPES registry as of the last update on 2016-12-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.