Yishui Chen, MD
Sleep Medicine (Internal Medicine) Physician · Novato, CA
Yishui Chen, MD is a sleep medicine (internal medicine) physician with a practice address in Novato, California, and NPI 1619546884, issued on Jun 22, 2021. Check the license (California A201576, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Yishui Chen
- Credential
- MD
- Primary taxonomy
- Sleep Medicine (Internal Medicine) Physician 207RS0012X
- License number
- A201576 CA
Self-reported in NPPES; status is on the state search - Practice location
- 100 Rowland Way Ste 300, Novato, CA 94945
- Phone
- (415) 878-0225
- Enumerated
- Jun 22, 2021
- Record last updated
- May 22, 2026
- Fax
- (415) 878-0215
- Entity
- Type 1 · individual
8 nearest sleep medicine (internal medicine) physician records → All 129 in California → Look up another NPI →
Also registered at 100 Rowland Way Ste 300
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Laura Mullen, MDSleep Medicine (Internal Medicine) Physician1992373930
- Brian Rodysill, MDSleep Medicine (Internal Medicine) Physician1093291635
- Michael RomeroMedical Physician Assistant1427673656
- Jenny Tran, DOSleep Medicine (Internal Medicine) Physician1750917753
Verify Yishui Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A201576Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
77% fewer Medicare Part D claims than the average sleep medicine (internal medicine) physician in 2024
135 Medicare Part D claims for 29 beneficiaries, against an average of 585 among the 852 providers of this specialty who prescribed in Part D.
Most prescribed
- Lamotrigine22 claims
- Gabapentin15 claims
- Oxcarbazepine15 claims
- Levetiracetam12 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.
Yishui Chen among 129 sleep medicine (internal medicine) physician records in California
Yishui Chen, MD is one of 129 sleep medicine (internal medicine) physician records with a practice address in California. 95% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 91% of them.
- NPI issued2021 · 91% of these records are older, 5% newer
- In a Medicare fileYes · 95% of these records are
- In the CMS Doctors and Clinicians fileNo · 82% of these records are
- Record last updated2026 · 35% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RS0012X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Sleep Medicine (Internal Medicine) Physician providers in California
There are 129 sleep medicine (internal medicine) physician records in California.
All 129 in California → Every provider in Novato → Sleep Medicine (Internal Medicine) Physician nationwide →
The 8 sleep medicine (internal medicine) physician records with the nearest ZIP codes
- Laura Mullen, MDNovato, CA 949451992373930
- Brian Rodysill, MDNovato, CA 949451093291635
- Jenny Tran, DONovato, CA 949451750917753
- William Hart, M.D.Capitola, CA 950101609856582
- Jennifer Acostamadiedo, MDSanta Cruz, CA 950651417479288
- Sirish Nakka, MDSanta Cruz, CA 950651619406725
- Poulomee Tripathi, MDSanta Cruz, CA 950651255071049
- Ajitpal Sethi, M.D.Stockton, CA 952091235322603
Common questions
What is Yishui Chen, MD's NPI number?
Yishui Chen, MD's National Provider Identifier (NPI) is 1619546884, issued on Jun 22, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Yishui Chen, MD located?
The NPPES record lists a practice address at 100 Rowland Way Ste 300, Novato, CA, 94945. Phone: (415) 878-0225. Providers update this record themselves, so call before visiting.
How can I verify Yishui Chen, MD's license?
NPPES lists California license number A201576, 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 Yishui Chen, MD prescribe under Medicare Part D?
In 2024, Yishui Chen, MD had 135 Medicare Part D claims for 29 beneficiaries; the average among sleep medicine (internal medicine) physician prescribers was 585. 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.