Quick answers
- Does Brian F. Lasonde accept Medicare assignment?
- Yes. Medicare's clinician data says Brian F. Lasonde 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 Brian F. Lasonde see?
- In 2024, CMS data shows 290 Original Medicare patients and 34,890 services for Brian F. Lasonde. This counts Original Medicare only and measures volume, not quality.
- What is Brian F. Lasonde's NPI number?
- 1417590092. 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 Brian F. Lasonde, 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 | 290 |
|---|---|
| Services billed to Medicare | 34,890 |
| Different services or procedures | 114 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Injection, pembrolizumab, 1 mg (J9271)4,400 services
- Injection, denosumab, 1 mg (J0897)1,620 services
- Injection, ondansetron hydrochloride, per 1 mg (J2405)288 services
- Injection, dexamethasone sodium phosphate, 1 mg (J1100)210 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)117 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 pressure74%
- High cholesterol74%
- Arthritis44%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)41%
- Diabetes40%
- Osteoporosis38%
Hospitals where Brian F. Lasonde works
Medicare's Facility Affiliation Data lists Brian F. Lasonde 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.
- Eden Medical CenterCastro Valley, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050488
- Washington HospitalFremont, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050195
Practice locations
Addresses where Brian F. Lasonde is enrolled with Medicare (CMS data updated October 2, 2026).
- 2000 Mowry AveFremont, CA 94538 (510) 797‑7111
- 3200 Kearney StFremont, CA 94538 (510) 490‑1222
Group practices
Medicare enrollment lists Brian F. Lasonde as a member of this group (CMS data updated October 2, 2026).
- Sutter Bay Medical Foundation3,829 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Fremont
Clinicians with the same Medicare primary specialty in Fremont, CA — not a recommendation.
Other clinicians in Sutter Bay Medical Foundation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2019 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1417590092 |
| 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