Medical emergency?Emergency? Call 911. Nearest emergency roomsNearest ERs

Dermatology

Foy W. Cox, MD

Works at hospitals in Marysville, CA · California

Summary

Dr. Foy W. Cox, MD is a dermatologist at 16911 Willow Glen Rd, Brownsville, CA 95919. Phone: (530) 675-2457. Accepts Medicare assignment. In 2024, Foy W. Cox had 774 Original Medicare patients and 4,377 services. NPI 1184611048. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: Dermatologist (Medicare lists Dermatology)
  • Address: 16911 Willow Glen Rd, Brownsville, CA 95919 · Directions (1 more location)
  • Phone: (530) 675‑2457
  • Medicare: Accepts Medicare assignment
  • Hospital: Adventist Health and Rideout
  • Group practice: Sutter Valley Medical Foundation
  • Medical school: University Of Kentucky College Of Medicine · graduated 1977 (49 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Foy W. Cox, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Foy W. Cox accept Medicare assignment?
Yes. Medicare's clinician data says Foy W. Cox 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 Foy W. Cox see?
In 2024, CMS data shows 774 Original Medicare patients and 4,377 services for Foy W. Cox. This counts Original Medicare only and measures volume, not quality.
What is Foy W. Cox's NPI number?
1184611048. 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 Foy W. Cox, 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 patients774
Services billed to Medicare4,377
Different services or procedures78
Participating Medicare providerYes
Average age of these patients77

Most frequent services

  1. Destruction of precancer skin growth, 2-14 growths (17003)978 services
  2. Unclassified biologics (J3590)876 services
  3. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)665 services
  4. Destruction of precancer skin growth, 1 growth (17000)360 services
  5. Destruction of skin growth, 1-14 growths (17110)234 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 cholesterol75%
  • High blood pressure73%
  • Arthritis48%
  • Ischemic heart disease28%
  • Diabetes27%
  • Chronic kidney disease26%

Hospitals where Foy W. Cox works

Medicare's Facility Affiliation Data lists Foy W. Cox 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 and RideoutMarysville, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050133

Practice locations

Addresses where Foy W. Cox is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Foy W. Cox as a member of this group (CMS data updated October 2, 2026).

  • Sutter Valley Medical Foundation2,500 clinicians in the group

Specialties

Find other Dermatology doctors in California →

Other dermatologists in California

Clinicians with the same Medicare primary specialty in California — not a recommendation.

All dermatologists in California →

Other clinicians in Sutter Valley Medical Foundation

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Medical schoolUniversity Of Kentucky College Of Medicine
Graduation year1977 (49 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1184611048
CorrectionsReport 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

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians