Ling-Ya Chao, MD
Neurology Physician · San Francisco, CA
Ling-Ya Chao, MD is a neurology physician with a practice address in San Francisco, California, and NPI 1245868199, issued on Mar 27, 2020. Check the license (California A185283, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ling-Ya Chao
- Credential
- MD
- Primary taxonomy
- Neurology Physician 2084N0400X
- License number
- A185283 CA
Self-reported in NPPES; status is on the state search - Practice location
- 400 Parnassus Ave FL 8, San Francisco, CA 94143
- Phone
- (415) 353-2437
- Enumerated
- Mar 27, 2020
- Record last updated
- Jun 30, 2025
- Medicare enrollment
- Enrolled (PECOS I20250714001262); accepts Medicare assignment
- Medical or professional school
- Harvard Medical School, 2020
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 400 Parnassus Ave FL 8
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Ling-Ya Chao in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A185283Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average neurology physician in 2024
57 Medicare Part D claims for 21 beneficiaries, against an average of 1,370 among the 15,005 providers of this specialty who prescribed in Part D.
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.
Bills Medicare through 2 group practices
- Ucsf Medical Group Business ServicesBurlingame, CA
- University OF California San FranciscoSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Neurology Physician providers in California
There are 2,339 neurology physician records in California.
Other neurology physician records in California
- Venkat Raghav Aachi, MDThousand Oaks, CA1740640051
- John Aalbers, M.D.San Diego, CA1942262431
- Kafia Abbasi, M.D.French Camp, CA1215114897
- Puya Abbassi, D.O.San Jose, CA1831695428
- Ahmed Abdelhak, MB CHBSan Francisco, CA1053013748
- Diana Abdulrahman, M.D.Pomona, CA1518276880
- Hadi Abou El Hassan, MDLos Angeles, CA1053995720
- John Paul Aboubechara, MD, PHDPalo Alto, CA1205461803
- Saheil AboutalibLong Beach, CA1548551112
- Justin Abraham, M.D., M.B.A.Santa Barbara, CA1225322522
Common questions
What is Ling-Ya Chao, MD's NPI number?
Ling-Ya Chao, MD's National Provider Identifier (NPI) is 1245868199, issued on Mar 27, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Ling-Ya Chao, MD located?
The NPPES record lists a practice address at 400 Parnassus Ave FL 8, San Francisco, CA, 94143. Phone: (415) 353-2437. Providers update this record themselves, so call before visiting.
How can I verify Ling-Ya Chao, MD's license?
NPPES lists California license number A185283, 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 Ling-Ya Chao, MD prescribe under Medicare Part D?
In 2024, Ling-Ya Chao, MD had 57 Medicare Part D claims for 21 beneficiaries; the average among neurology physician prescribers was 1,370. 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.