Amber Yaoyao Chen, MD, MBA
Allergy & Immunology Physician · San Francisco, CA
Amber Yaoyao Chen, MD, MBA is an allergy & immunology physician with a practice address in San Francisco, California, and NPI 1871282582, issued on May 8, 2023. Check the license (California A208752, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Amber Yaoyao Chen
- Credential
- MD, MBA
- Primary taxonomy
- Allergy & Immunology Physician 207K00000X
- License numbers
- A208752 CA
CLP05850 RI
LP05850 RI
Self-reported in NPPES; status is on the state search - Practice location
- 505 Parnassus Ave # 111, San Francisco, CA 94143
- Phone
- (415) 514-4764
- Enumerated
- May 8, 2023
- Record last updated
- Jun 22, 2026
- Entity
- Type 1 · individual
8 nearest allergy & immunology physician records → All 444 in California → Look up another NPI →
Also registered at 505 Parnassus Ave # 111
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Elizabeth Gay, MDInternal Medicine Physician1760018758
Verify Amber Yaoyao Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A208752Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
27% fewer Medicare Part D claims than the average allergy & immunology physician in 2024
541 Medicare Part D claims for 103 beneficiaries, against an average of 741 among the 2,899 providers of this specialty who prescribed in Part D.
Most prescribed
- Omeprazole33 claims
- Losartan Potassium26 claims
- Atorvastatin Calcium22 claims
- Amlodipine Besylate20 claims
- Eliquis18 claims
- Levothyroxine Sodium16 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.
Amber Yaoyao Chen among 444 allergy & immunology physician records in California
Amber Yaoyao Chen, MD, MBA is one of 444 allergy & immunology physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than over 99% of them.
- NPI issued2023 · over 99% of these records are older, under 1% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2026 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207K00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Allergy & Immunology Physician providers in California
There are 444 allergy & immunology physician records in California.
All 444 in California → Every provider in San Francisco → Allergy & Immunology Physician nationwide →
The 8 allergy & immunology physician records with the nearest ZIP codes
- Roger Espiritu, M.D.San Francisco, CA 941431336235365
- Matthew McCulloch, M.D.San Francisco, CA 941431326401019
- Monica TangSan Francisco, CA 941431396011409
- Diane Wara, M.D.San Francisco, CA 941431750317004
- James Chen, DOSan Francisco, CA 941211891870119
- Susan Kim, MDSan Francisco, CA 941211114160405
- Faith Bocobo, MDSan Francisco, CA 941151669550265
- Calvin So, MDSan Francisco, CA 941151629156229
Common questions
What is Amber Yaoyao Chen, MD, MBA's NPI number?
Amber Yaoyao Chen, MD, MBA's National Provider Identifier (NPI) is 1871282582, issued on May 8, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Amber Yaoyao Chen, MD, MBA located?
The NPPES record lists a practice address at 505 Parnassus Ave # 111, San Francisco, CA, 94143. Phone: (415) 514-4764. Providers update this record themselves, so call before visiting.
How can I verify Amber Yaoyao Chen, MD, MBA's license?
NPPES lists California license number A208752, 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 Amber Yaoyao Chen, MD, MBA prescribe under Medicare Part D?
In 2024, Amber Yaoyao Chen, MD, MBA had 541 Medicare Part D claims for 103 beneficiaries; the average among allergy & immunology physician prescribers was 741. 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.