Chau Chun Chien, MD
Neurology Physician · San Francisco, CA
Chau Chun Chien, MD is a neurology physician with a practice address in San Francisco, California, and NPI 1578503462, issued on Jun 7, 2006. Check the license (California A45801, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Chau Chun Chien
- Credential
- MD
- Primary taxonomy
- Neurology Physician 2084N0400X
- License number
- A45801 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3115 Geary Blvd, San Francisco, CA 94118
- Phone
- (415) 981-6013
- Enumerated
- Jun 7, 2006
- Record last updated
- Oct 11, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (415) 962-1302
- Medicare enrollment
- Enrolled (PECOS I20080528000499); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest neurology physician records → All 2,339 in California → Look up another NPI →
Verify Chau Chun Chien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A45801Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
47% fewer Medicare Part D claims than the average neurology physician in 2024
720 Medicare Part D claims for 227 beneficiaries, against an average of 1,370 among the 15,005 providers of this specialty who prescribed in Part D. Brand-name drugs were 3% of claims.
Most prescribed
- Memantine Hcl245 claims
- Gabapentin99 claims
- Carbidopa-Levodopa Er84 claims
- Levetiracetam45 claims
- Carbidopa-Levodopa24 claims
- Selegiline Hcl22 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.
Chau Chun Chien among 2,339 neurology physician records in California
Chau Chun Chien, MD is one of 2,339 neurology physician records with a practice address in California. 81% 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 4% of them.
- NPI issued2006 · 4% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated1982 · median 2006 among the 1,628 with a school on file
- Record last updated2017 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084N0400X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Neurology Physician providers in California
There are 2,339 neurology physician records in California.
All 2,339 in California → Every provider in San Francisco → Neurology Physician nationwide →
The 8 neurology physician records with the nearest ZIP codes
- John BestSan Francisco, CA 941181871955476
- Joanna Hellmuth, MD, MHSSan Francisco, CA 941181497073001
- Pressley Chakales, MDSan Francisco, CA 941171093344988
- Mary Genevieve, M.D.San Francisco, CA 941171871598706
- Sheetal Hegde, MDSan Francisco, CA 941171689203010
- William Jagust, MDSan Francisco, CA 941171265765622
- Jaehyun Kim, M.D.San Francisco, CA 941171639602618
- Donald Kitt, M.D.San Francisco, CA 941171477641090
Common questions
What is Chau Chun Chien, MD's NPI number?
Chau Chun Chien, MD's National Provider Identifier (NPI) is 1578503462, issued on Jun 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Chau Chun Chien, MD located?
The NPPES record lists a practice address at 3115 Geary Blvd, San Francisco, CA, 94118. Phone: (415) 981-6013. Providers update this record themselves, so call before visiting.
How can I verify Chau Chun Chien, MD's license?
NPPES lists California license number A45801, 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 Chau Chun Chien, MD prescribe under Medicare Part D?
In 2024, Chau Chun Chien, MD had 720 Medicare Part D claims for 227 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.