Kok-Tong Ling, M.D.
Nephrology Physician · San Francisco, CA
Kok-Tong Ling, M.D. is a nephrology physician with a practice address in San Francisco, California, and NPI 1164400263, issued on Jan 9, 2006. Check the license (California A45478, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Kok-Tong Ling
- Credential
- M.D.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- A45478 CA
Self-reported in NPPES; status is on the state search - Practice location
- 450 Sutter St., Suite 935, San Francisco, CA 94108
- Phone
- (415) 433-7761
- Enumerated
- Jan 9, 2006
- Record last updated
- Oct 24, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (415) 433-7763
- Medicaid ID
- 00A454780 CA
- Medicare enrollment
- Enrolled (PECOS I20080117000268); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 1,468 in California → Look up another NPI →
Verify Kok-Tong Ling in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A45478Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
58% fewer Medicare Part D claims than the average nephrology physician in 2024
615 Medicare Part D claims for 76 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 26% of claims.
Most prescribed
- Sevelamer Carbonate53 claims
- Furosemide45 claims
- Amlodipine Besylate41 claims
- Farxiga38 claims
- Calcium Acetate30 claims
- Losartan Potassium21 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $567.82
11 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 8,230 providers of this specialty with any payment received $3,091.37 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Regents OF The University OF CaliforniaSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kok-Tong Ling among 1,468 nephrology physician records in California
Kok-Tong Ling, M.D. is one of 1,468 nephrology physician records with a practice address in California. 88% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 48% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated1984 · median 2001 among the 1,128 with a school on file
- Record last updated2007 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in California
There are 1,468 nephrology physician records in California.
All 1,468 in California → Every provider in San Francisco → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Maian Ye, DOSan Francisco, CA 941081912198110
- Hanlon Fong, MDSan Francisco, CA 941091184607970
- Shiang-Cheng Kung, MDSan Francisco, CA 941091427017185
- J. David Malone, MDSan Francisco, CA 941091952404253
- Parul Patel, MDSan Francisco, CA 941091528262870
- Maria Samsonov, M.D., M.P.H.San Francisco, CA 941091598737025
- Chi ChuSan Francisco, CA 941101346651270
- Ilyas Iliya, MDSan Francisco, CA 941101336214634
Common questions
What is Kok-Tong Ling, M.D.'s NPI number?
Kok-Tong Ling, M.D.'s National Provider Identifier (NPI) is 1164400263, issued on Jan 9, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Kok-Tong Ling, M.D. located?
The NPPES record lists a practice address at 450 Sutter St., Suite 935, San Francisco, CA, 94108. Phone: (415) 433-7761. Providers update this record themselves, so call before visiting.
How can I verify Kok-Tong Ling, M.D.'s license?
NPPES lists California license number A45478, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Kok-Tong Ling, M.D. prescribe under Medicare Part D?
In 2024, Kok-Tong Ling, M.D. had 615 Medicare Part D claims for 76 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.