Kok Tong Ling, MD

Medicare activity in 2024

Official CMS public-use data for Kok Tong Ling, 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.

Most frequent services

1. Dialysis services, 2-3 physician visits per month (20 years or older) (90961)226 services
2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)96 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%
• Chronic kidney disease75%
• Diabetes68%
• Arthritis36%
• Heart failure28%

Hospitals where Kok Tong Ling works

Medicare's Facility Affiliation Data lists Kok Tong Ling 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.

• California Pacific Medical Center- Van Ness CampusSan Francisco, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050047
• Chinese HospitalSan Francisco, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050407

Practice locations

Addresses where Kok Tong Ling is enrolled with Medicare (CMS data updated October 2, 2026).

• 400 Parnassus AveSan Francisco, CA 94143 (415) 476‑4029
• 450 Sutter St, Suite 935San Francisco, CA 94108 (415) 433‑7761

Group practices

Medicare enrollment lists Kok Tong Ling as a member of this group (CMS data updated October 2, 2026).

• Regents of the University of California732 clinicians in the group

Specialties

• Nephrologyprimary
• Internal Medicinealso

Find other Nephrology doctors in California →

Other nephrologists in San Francisco

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

• Raymond Hsu, MD
• Paul R. Brakeman, MD
• Chi D. Chu, MD
• Sepehr Keyhani, MD
• Tracy Y. Jonelis, MD
• Delphine S. Tuot, MD
• Neha M. Garg
• Kerry C. Cho, MD

All nephrologists in San Francisco →

Other clinicians in Regents of the University of California

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

• Peter V. Chin-Hong, MD
• Anne M. Ritchie, MD
• Amrita Hans, MD
• Bradley J. Monash, MD
• Xixi Zhao, MD
• Lloyd W. Klein, MD

Clinician information

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