Joseph T. Chao, MD
Dermatology Physician · San Francisco, CA
Joseph T. Chao, MD is a dermatology physician with a practice address in San Francisco, California, and NPI 1861805210, issued on Jun 3, 2014. Check the license (California A154992, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Joseph T. Chao
- Credential
- MD
- Primary taxonomy
- Dermatology Physician 207N00000X
- License number
- A154992 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1100 Van Ness Ave FL 6, San Francisco, CA 94109
- Phone
- (415) 600-5778
- Enumerated
- Jun 3, 2014
- Record last updated
- Mar 7, 2023
- Fax
- (520) 800-1169
- Medicare enrollment
- Enrolled (PECOS I20181020000518); accepts Medicare assignment
- Medical or professional school
- University Of Arizona College Of Medicine, 2015
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 1100 Van Ness Ave FL 6
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Joseph T. Chao in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A154992Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2% fewer Medicare Part D claims than the average dermatology physician in 2024
780 Medicare Part D claims for 342 beneficiaries, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims.
Most prescribed
- Fluorouracil177 claims
- Triamcinolone Acetonide100 claims
- Clobetasol Propionate86 claims
- Ketoconazole65 claims
- Calcipotriene60 claims
- Dupixent Pen57 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.
Industry payments in 2024: $3,923.36
150 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 10,250 providers of this specialty with any payment received $8,544.61 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Sutter Bay Medical FoundationBerkeley, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Dermatology Physician providers in California
There are 2,083 dermatology physician records in California.
Other dermatology physician records in California
- Sam Abaza, M.D.Diamond Bar, CA1831148501
- Farah Abdulla, MDDuarte, CA1093934390
- Robert Abergel, M.D.Santa Monica, CA1841565843
- Karen Abisogun, MDLos Angeles, CA1124474515
- Glynis Ablon, M.D.Manhattan Beach, CA1144292889
- Arthur Abrams, MDMountain View, CA1518093178
- Payam Abrishami, MDAgoura Hills, CA1447288147
- Aseel Abu-NasserRedding, CA1609641711
- Rachel Abuav, M.D.Beverly Hills, CA1356481733
- Boya Abudu, MD, MPHSacramento, CA1336608637
Common questions
What is Joseph T. Chao, MD's NPI number?
Joseph T. Chao, MD's National Provider Identifier (NPI) is 1861805210, issued on Jun 3, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Joseph T. Chao, MD located?
The NPPES record lists a practice address at 1100 Van Ness Ave FL 6, San Francisco, CA, 94109. Phone: (415) 600-5778. Providers update this record themselves, so call before visiting.
How can I verify Joseph T. Chao, MD's license?
NPPES lists California license number A154992, 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 Joseph T. Chao, MD prescribe under Medicare Part D?
In 2024, Joseph T. Chao, MD had 780 Medicare Part D claims for 342 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.