Quick answers
- Where does John L. Mayfield see patients?
- Medicare's clinician data lists 1 practice location in Grass Valley, CA. Call before your visit to confirm the address.
- What is John L. Mayfield's specialty?
- Medicare lists Chiropractic as the primary specialty, and also Oral Surgery.
- Does John L. Mayfield accept Medicare assignment?
- Medicare's clinician data says John L. Mayfield may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is the phone number for John L. Mayfield?
- (530) 272-8839, as listed in official Medicare / NPI Registry data.
- What is John L. Mayfield's NPI number?
- 1255366381. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where John L. Mayfield is enrolled with Medicare (CMS data updated 2026-10-02).
- 565 Brunswick RdGrass Valley, CA 95945 (530) 272‑8839
Specialties
- Chiropracticprimary
- Oral Surgeryalso
Other chiropractors in Grass Valley
Clinicians with the same Medicare primary specialty in Grass Valley, CA — not a recommendation.
Clinician information
| Credential | DC |
|---|---|
| Graduation year | 1972 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1255366381 |
| 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
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- 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