Quick answers
- Does Chester C. Granka accept Medicare assignment?
- Yes. Medicare's clinician data says Chester C. Granka 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 Chester C. Granka see?
- In 2024, CMS data shows 123 Original Medicare patients and 1,792 services for Chester C. Granka. This counts Original Medicare only and measures volume, not quality.
- What is Chester C. Granka's NPI number?
- 1952451676. 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 Chester C. Granka, 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 | 123 |
|---|---|
| Services billed to Medicare | 1,792 |
| Different services or procedures | 2 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Chiropractic manipulative treatment, 3-4 spinal regions (98941)1,018 services
- Chiropractic manipulative treatment, 1-2 spinal regions (98940)774 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 cholesterol70%
- High blood pressure62%
- Arthritis33%
- Diabetes19%
- Ischemic heart disease19%
- Anxiety15%
Hospitals where Chester C. Granka works
Medicare's Facility Affiliation Data lists Chester C. Granka 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.
- Oroville HospitalOroville, CA · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 050030
Practice locations
Addresses where Chester C. Granka is enrolled with Medicare (CMS data updated October 2, 2026).
- 1915 Myers StOroville, CA 95966 (530) 531‑0455
Specialties
- Chiropracticprimary
Other chiropractors in Oroville
Clinicians with the same Medicare primary specialty in Oroville, CA — not a recommendation.
Clinician information
| Credential | CH |
|---|---|
| School | Western States College Of Chiropractic |
| Graduation year | 1981 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1952451676 |
| 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