Ernest Yih Chyun Lee, MD, PHD
Dermatology Physician · San Francisco, CA
Ernest Yih Chyun Lee, MD, PHD is a dermatology physician with a practice address in San Francisco, California, and NPI 1619506359, issued on Apr 4, 2020. Check the license (California A185902, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ernest Yih Chyun Lee
- Credential
- MD, PHD
- Primary taxonomy
- Dermatology Physician 207N00000X
- License number
- A185902 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1701 Divisadero St, San Francisco, CA 94115
- Phone
- (415) 353-7800
- Enumerated
- Apr 4, 2020
- Record last updated
- Apr 7, 2026
- Medicare enrollment
- Enrolled (PECOS I20230711002436); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 2020
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest dermatology physician records → All 2,083 in California → Look up another NPI →
Also registered at 1701 Divisadero St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Regina-Celeste Ahmad, M.D., PHDDermatology Physician1861629321
- Erin Amerson, M.D.Dermatology Physician1679732671
- Ryan Arakaki, MDDermatology Physician1063850600
- Timothy Berger, MDDermatology Physician1124079181
- David Buchholz, MDPediatrics Physician1487738191
- Daniel Butler, M.D.Internal Medicine Physician1013320738
Verify Ernest Yih Chyun Lee in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A185902Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
16% fewer Medicare Part D claims than the average dermatology physician in 2024
670 Medicare Part D claims for 271 beneficiaries, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.
Most prescribed
- Ketoconazole90 claims
- Clobetasol Propionate89 claims
- Fluorouracil64 claims
- Triamcinolone Acetonide57 claims
- Fluocinonide47 claims
- Gabapentin36 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.
Bills Medicare through 2 group practices
- Permanente Medical Group IncSan Bruno, 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).
Ernest Yih Chyun Lee among 2,083 dermatology physician records in California
Ernest Yih Chyun Lee, MD, PHD is one of 2,083 dermatology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 92% of them.
- NPI issued2020 · 92% of these records are older, 5% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2020 · median 2006 among the 1,450 with a school on file
- Record last updated2026 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207N00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Dermatology Physician providers in California
There are 2,083 dermatology physician records in California.
All 2,083 in California → Every provider in San Francisco → Dermatology Physician nationwide →
The 8 dermatology physician records with the nearest ZIP codes
- Timothy Berger, MDSan Francisco, CA 941151124079181
- Kerry Blacker, MDSan Francisco, CA 941151841378452
- Mary Connolly, MDSan Francisco, CA 941151942265772
- Quita Cruciger, M.D.San Francisco, CA 941151629161245
- Lindy Fox, MDSan Francisco, CA 941151790738953
- Anna Haemel, M.D.San Francisco, CA 941151962448522
- Frank Jonelis, MDSan Francisco, CA 941151245318849
- Mohammed Kashani-Sabet, M.D.San Francisco, CA 941151629026174
Common questions
What is Ernest Yih Chyun Lee, MD, PHD's NPI number?
Ernest Yih Chyun Lee, MD, PHD's National Provider Identifier (NPI) is 1619506359, issued on Apr 4, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Ernest Yih Chyun Lee, MD, PHD located?
The NPPES record lists a practice address at 1701 Divisadero St, San Francisco, CA, 94115. Phone: (415) 353-7800. Providers update this record themselves, so call before visiting.
How can I verify Ernest Yih Chyun Lee, MD, PHD's license?
NPPES lists California license number A185902, 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 Ernest Yih Chyun Lee, MD, PHD prescribe under Medicare Part D?
In 2024, Ernest Yih Chyun Lee, MD, PHD had 670 Medicare Part D claims for 271 beneficiaries; the average among dermatology physician prescribers was 797. 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.