Irving Cherng Yuh Ling
Internal Medicine Physician · San Francisco, CA
Irving Cherng Yuh Ling is an internal medicine physician with a practice address in San Francisco, California, and NPI 1588124747, issued on Mar 23, 2019. Check the license (California A177449, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Irving Cherng Yuh Ling
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A177449 CA
Self-reported in NPPES; status is on the state search - Practice location
- 505 Parnassus Ave # 119, San Francisco, CA 94143
- Phone
- (415) 206-5164
- Enumerated
- Mar 23, 2019
- Record last updated
- Jul 25, 2022
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 505 Parnassus Ave # 119
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Shirley Mo, MDStudent in an Organized Health Care Education/Training Program1265061311
Verify Irving Cherng Yuh Ling in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A177449Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average internal medicine physician in 2024
162 Medicare Part D claims for 48 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Amlodipine Besylate15 claims
- Famotidine12 claims
- Metformin Hcl12 claims
- Losartan Potassium11 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.
Irving Cherng Yuh Ling among 17,696 internal medicine physician records in California
Irving Cherng Yuh Ling is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 86% of them.
- NPI issued2019 · 86% of these records are older, 11% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2022 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,318 internal medicine physician records list a practice address in San Francisco
They are 1,318 of the 38,143 NPPES records with a practice address in San Francisco, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in San Francisco → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Nathan Bass, MDSan Francisco, CA 941431689638959
- Margaret Fang, MDSan Francisco, CA 941431417911462
- Katherine Julian, MDSan Francisco, CA 941431003879826
- John Kane, MDSan Francisco, CA 941431467416461
- Suneil Koliwad, M.D., PH.D.San Francisco, CA 941431225006687
- Bernard Lo, MDSan Francisco, CA 941431184688137
- Stephen McPhee, MDSan Francisco, CA 941431124082490
- Andrew Posselt, MDSan Francisco, CA 941431235193616
Common questions
What is Irving Cherng Yuh Ling's NPI number?
Irving Cherng Yuh Ling's National Provider Identifier (NPI) is 1588124747, issued on Mar 23, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Irving Cherng Yuh Ling located?
The NPPES record lists a practice address at 505 Parnassus Ave # 119, San Francisco, CA, 94143. Phone: (415) 206-5164. Providers update this record themselves, so call before visiting.
How can I verify Irving Cherng Yuh Ling's license?
NPPES lists California license number A177449, 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 Irving Cherng Yuh Ling prescribe under Medicare Part D?
In 2024, Irving Cherng Yuh Ling had 162 Medicare Part D claims for 48 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.