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Internal Medicine

Kimberly Fok, DO

Works at hospitals in Placerville, CA · Jackson, CA · Auburn, CA … · California

Summary

Dr. Kimberly Fok, DO is an internal medicine doctor at 2800 L St, Sacramento, CA 95816. Phone: (916) 454-6600. Accepts Medicare assignment. In 2024, Kimberly Fok had 259 Original Medicare patients and 442 services. NPI 1881073864. 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.

From official Medicare data

This page shows what Medicare's official clinician data says about Kimberly Fok, 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 Kimberly Fok accept Medicare assignment?
Yes. Medicare's clinician data says Kimberly Fok 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 Kimberly Fok see?
In 2024, CMS data shows 259 Original Medicare patients and 442 services for Kimberly Fok. This counts Original Medicare only and measures volume, not quality.
What is Kimberly Fok's NPI number?
1881073864. 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 Kimberly Fok, 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 patients259
Services billed to Medicare442
Different services or procedures10
Participating Medicare providerYes
Average age of these patients75

Most frequent services

  1. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)203 services
  2. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)164 services
  3. Hospital discharge day management, more than 30 minutes (99239)42 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 blood pressure75%
  • High cholesterol75%
  • Heart failure55%
  • Arthritis54%
  • Chronic kidney disease54%
  • Ischemic heart disease53%

Hospitals where Kimberly Fok works

Medicare's Facility Affiliation Data lists Kimberly Fok 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.

Practice locations

Addresses where Kimberly Fok is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Kimberly Fok as a member of this group (CMS data updated October 2, 2026).

  • Sutter Valley Medical Foundation2,500 clinicians in the group

Specialties

Find other Internal Medicine doctors in California →

Other internal medicine doctors in Sacramento

Clinicians with the same Medicare primary specialty in Sacramento, CA — not a recommendation.

All internal medicine doctors in Sacramento →

Other clinicians in Sutter Valley Medical Foundation

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

Clinician information

CredentialDO
Medical schoolAt Still University Of Health Sciences, College Of Osteo Med, Kirksville
Graduation year2015 (11 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1881073864
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