Quick answers
- Does Arthur B. Fontaine accept Medicare assignment?
- Medicare's clinician data says Arthur B. Fontaine may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- How many Medicare patients does Arthur B. Fontaine see?
- In 2024, CMS data shows 4,986 Original Medicare patients and 9,613 services for Arthur B. Fontaine. This counts Original Medicare only and measures volume, not quality.
- What is Arthur B. Fontaine's NPI number?
- 1225020845. 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 Arthur B. Fontaine, 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 | 4,986 |
|---|---|
| Services billed to Medicare | 9,613 |
| Different services or procedures | 201 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- X-ray of chest, 1 view (71045)2,758 services
- Ct scan head or brain without contrast (70450)618 services
- X-ray of chest, 2 views (71046)586 services
- Ct scan of abdomen and pelvis with contrast (74177)403 services
- Ct scan of abdomen and pelvis without contrast (74176)386 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 pressure75%
- High cholesterol75%
- Diabetes52%
- Arthritis48%
- Ischemic heart disease38%
- Chronic kidney disease37%
Hospitals where Arthur B. Fontaine works
Medicare's Facility Affiliation Data lists Arthur B. Fontaine 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.
- Adventist Health ClearlakeClearlake, CA · Critical Access Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 051317
- Adventist Health HanfordHanford, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050121
- Adventist Health ReedleyReedley, CA · Acute Care Hospital · Emergency services: not listed by Medicare · CCN 050192
- Adventist Health TulareTulare, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050784
- Adventist Health White MemorialLos Angeles, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: not listed by Medicare · CCN 050103
Practice locations
Addresses where Arthur B. Fontaine is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 12; the Medicare profile lists all.
- 1 Marcela DrWillits, CA 95490 (707) 459‑6801
- 111 Raley Blvd, Suite 160Chico, CA 95928 (530) 343‑3868
- 125 Mall Dr, Suite 305Hanford, CA 93230 (559) 537‑0440
- 15630 18th AveClearlake, CA 95422 (707) 994‑6486
- 1720 E Cesar E Chavez AveLos Angeles, CA 90033 · Radiology Medical Group of WMMC
Group practices
Medicare enrollment lists Arthur B. Fontaine as a member of these groups (CMS data updated October 2, 2026).
- Adventist Health Physicians Network628 clinicians in the group
- Adventist Health Clearlake Hospital Inc.87 clinicians in the group
- Willits Hospital Inc67 clinicians in the group
- Reedley Community Hospital62 clinicians in the group
- Hanford Community Hospital59 clinicians in the group
- Adventist Health Mendocino Coast56 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Willits
Clinicians with the same Medicare primary specialty in Willits, CA — not a recommendation.
Other clinicians in Adventist Health Physicians Network
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Albany Medical College Of Union University |
| Graduation year | 1981 (45 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1225020845 |
| 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