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DR. RALPH EDWARD RETHERFORD M.D.
NPI 1801043799
Family Medicine in Sonora, CA

Active since August 21, 2008PECOS Enrolled
20405 LYONS BALD MTN RD, SONORA, CA 95370(209) 588-1424(209) 588-1521 Get Directions Write a Review

NPPES record last updated: August 18, 2016. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Ralph Edward Retherford M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. RALPH EDWARD RETHERFORD M.D. (NPI 1801043799) is an individual family medicine provider in Sonora, California, licensed in California (A24305) and active in the NPI registry since August 2008. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1801043799
Entity TypeIndividualMale
Primary Taxonomy207Q00000X
Provider Legal NameDR. RALPH EDWARD RETHERFORDCredential: M.D.
Location Address20405 LYONS BALD MTN RDSonora, CA 95370-8780
Mailing AddressPo Box 4990Sonora, CA 95370-1990 · (209) 588-1424 · Fax (209) 588-1521
Phone(209) 588-1424
Fax(209) 588-1521
Sole ProprietorYes
Enumeration DateAugust 21, 2008
Last NPPES UpdateAugust 18, 2016
✔ NPI 1801043799 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 5

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in CA · A24305
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
Also ListedFamily Medicine · Adolescent MedicineTaxonomy 207QA0000X · License A24305 (CA)
Also ListedFamily Medicine · Addiction MedicineTaxonomy 207QA0401X · License A24305 (CA)
Also ListedFamily Medicine · Adult MedicineTaxonomy 207QA0505X · License A24305 (CA)
Also ListedGeneral PracticeTaxonomy 208D00000X · License A24305 (CA)
20405 LYONS BALD MTN RD, Sonora, CA 95370
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Ralph Edward Retherford M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Ralph Retherford reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Sonora Community Hospital
0.8 mi
Family Medicine
19747 GREENLEY RD, SUITE S-2
Sonora, CA 95370
  • Reassigned Medicare billing, California enrollment
  • 127 clinicians in this Medicare group
NPI 1033100854 (209) 536-2665
Mathiesen Memorial Health Clinic
4.2 mi
Federally Qualified Health Center (FQHC)
18144 SECO ST
Jamestown, CA 95327
  • Reassigned Medicare billing, Texas enrollment
  • 17 clinicians in this Medicare group
NPI 1255595484 (209) 984-4820

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95370 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$90.32 typical visit price
range $58.87 – $176.60
Typical copayment $22.58 (range $14.71 – $44.15)
Most-billed visit code 99203
Established Patient
$103.36 typical visit price
range $19.28 – $144.60
Typical copayment $25.84 (range $4.82 – $36.15)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Ralph Retherford's NPI number?

The NPI number for Ralph Retherford is 1801043799. It was assigned to this individual provider in the NPPES registry on August 21, 2008.

Where is Ralph Retherford located?

Ralph Retherford practices at 20405 Lyons Bald Mtn Rd, Sonora, CA 95370. The listed phone number is (209) 588-1424.

What is Ralph Retherford's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Ralph Retherford enrolled in Medicare?

Yes. Ralph Retherford is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Ralph Retherford's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ralph Retherford reassigns Medicare benefits to 2 organizations: Sonora Community Hospital (Sonora, CA) and Mathiesen Memorial Health Clinic (Jamestown, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Ralph Retherford's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Ralph Retherford was last updated on August 18, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.