Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Alan F Gruenefeldt, MD

Individual provider Family Medicine Physician · NPI 1780795930

Alan F Gruenefeldt, MD is registered under Family Practice in Auburn, California. Graduated from Oregon Health Sciences University School of Medicine in 1989, 37 years ago. Practices with Western Sierra Medical Clinic Inc, a 34-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
37
Trained at
Oregon Health Sciences University School of Medicine
Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

404 Auburn Folsom Rd
Auburn, CA 95603-5515
Phone: (530) 885-6221
Fax: (530) 885-9403
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence G69052 (CA)

Record details

NPI number1780795930
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 31, 2006
Last updated in NPPESOctober 4, 2023
Certification dateOctober 4, 2023

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyFAMILY PRACTICE
Medical schoolOREGON HEALTH SCIENCES UNIVERSITY SCHOOL OF MEDICINE
Graduated 1989 (37 years in practice)
Group practice Western Sierra Medical Clinic Inc — 34 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients40
Services billed 67 a service is one billed item, such as a visit, a test or a procedure
Average patient age69

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Sierra Nevada Memorial Hospital Hospital · Grass Valley, CA · listed as Sierra Nevada Memorial-Miners Hospital
  • Sutter Auburn Faith Hospital Hospital · Auburn, CA
  • Progressive Home Care - Auburn Home health agency · Auburn, CA
  • Sutter Auburn Faith Vna & Hospice Home health agency · Auburn, CA

Colleagues at Western Sierra Medical Clinic Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 34 clinicians in the practice; 12 are shown here.

Other providers in Auburn