Quick answers
- Does Angela Brennan accept Medicare assignment?
- Yes. Medicare's clinician data says Angela Brennan accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Angela Brennan see?
- In 2024, CMS data shows 264 Original Medicare patients and 1,569 services for Angela Brennan. This counts Original Medicare only and measures volume, not quality.
- What is Angela Brennan's NPI number?
- 1346650629. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Angela Brennan, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 264 |
|---|---|
| Services billed to Medicare | 1,569 |
| Different services or procedures | 35 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)429 services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)219 services
- Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)73 services
- Injection of drug or substance under skin or into muscle (96372)49 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)45 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure73%
- High cholesterol69%
- Arthritis52%
- Diabetes39%
- Chronic kidney disease21%
- Osteoporosis21%
Hospitals where Angela Brennan works
Medicare's Facility Affiliation Data lists Angela Brennan at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- NorthBay Medical CenterFairfield, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050367
Practice locations
Addresses where Angela Brennan is enrolled with Medicare (CMS data updated October 2, 2026).
- 101 Main StWinters, CA 95694 (707) 646‑5500
- 1200 B Gale Wilson BlvdFairfield, CA 94533 (707) 429‑3600
- 2458 Hilborn RdFairfield, CA 94534 (707) 646‑5500
- 2470 Hilborn Rd, Suite 100and200Fairfield, CA 94534 (707) 646‑5500
Group practices
Medicare enrollment lists Angela Brennan as a member of these groups (CMS data updated October 2, 2026).
- NorthBay Physicians Surgery Center, LLC324 clinicians in the group
- NorthBay Health Medical Foundation213 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Winters
Clinicians with the same Medicare primary specialty in Winters, CA — not a recommendation.
Other clinicians in NorthBay Physicians Surgery Center, LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2014 (12 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1346650629 |
| 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 October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- 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