Tien-An Yang, MD, PHD
Ophthalmology Physician · Vallejo, CA
Tien-An Yang, MD, PHD is an ophthalmology physician with a practice address in Vallejo, California, and NPI 1164570347, issued on Jan 6, 2007. Check the license (California A89469, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Tien-An Yang
- Credential
- MD, PHD
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- A89469 CA
Self-reported in NPPES; status is on the state search - Practice location
- 975 Sereno Drive, Vallejo, CA 94589
- Phone
- (707) 651-5760
- Enumerated
- Jan 6, 2007
- Record last updated
- Feb 11, 2022
- Fax
- (707) 651-2980
- Medicare enrollment
- Enrolled (PECOS I20070612000648); accepts Medicare assignment
- Medical or professional school
- Js Weill Medical College, Cornell University, 2003
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 2,899 in California → Look up another NPI →
Also registered at 975 Sereno Drive
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Eliza Arreola-LapuzPharmacist1437681285
- Maggie Grazela, MDStudent in an Organized Health Care Education/Training Program1154117711
- Amy Kong, PHARM.D.Pharmacist1336238187
- Robyn Lakamsani, M.D.Family Medicine Physician1073786315
- Jake LoitzStudent in an Organized Health Care Education/Training Program1588291306
- Frederick Lopez, CRNACertified Registered Nurse Anesthetist1972668580
Verify Tien-An Yang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A89469Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.2 times the Medicare Part D claims of the average ophthalmology physician in 2024
3,344 Medicare Part D claims for 526 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 23% of claims.
Most prescribed
- Dorzolamide-Timolol762 claims
- Latanoprost651 claims
- Prednisolone Acetate563 claims
- Brimonidine Tartrate328 claims
- Timolol Maleate127 claims
- Diclofenac Sodium96 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: $36.53
1 payment: food and beverage; the largest payer was Alcon Vision LLC. The 13,221 providers of this specialty with any payment received $4,535.02 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
- Permanente Medical Group IncVallejo, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Tien-An Yang among 2,899 ophthalmology physician records in California
Tien-An Yang, MD, PHD is one of 2,899 ophthalmology 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 2007, is newer than 55% of them.
- NPI issued2007 · 55% of these records are older, 33% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2003 · median 2001 among the 1,907 with a school on file
- Record last updated2022 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in California
There are 2,899 ophthalmology physician records in California.
All 2,899 in California → Every provider in Vallejo → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Brian Bubnic, MDVallejo, CA 945891275611170
- Christine Chiou Smith, M.D.Vallejo, CA 945891225209034
- Alexander Dillon, M.D.Vallejo, CA 945891699120212
- David Gu, MDVallejo, CA 945891730634908
- Kristen Hartley, MDVallejo, CA 945891710914775
- David Robins, MDVallejo, CA 945891700965498
- Myra Beth Safo, MD, MPH, MSVallejo, CA 945891023507332
- David Simundson, MDVallejo, CA 945891548348444
Common questions
What is Tien-An Yang, MD, PHD's NPI number?
Tien-An Yang, MD, PHD's National Provider Identifier (NPI) is 1164570347, issued on Jan 6, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Tien-An Yang, MD, PHD located?
The NPPES record lists a practice address at 975 Sereno Drive, Vallejo, CA, 94589. Phone: (707) 651-5760. Providers update this record themselves, so call before visiting.
How can I verify Tien-An Yang, MD, PHD's license?
NPPES lists California license number A89469, 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 Tien-An Yang, MD, PHD prescribe under Medicare Part D?
In 2024, Tien-An Yang, MD, PHD had 3,344 Medicare Part D claims for 526 beneficiaries; the average among ophthalmology physician prescribers was 1,518. 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.