Dr. Tien-An Yang, MD, PhD
- Medicare services, 2024
- 31
- Medicare patients, 2024
- 19
- Part D claims, 2024
- 3,344
- Hospital affiliations
- 1
- Industry payments
- $37
- Practice address
- 975 Sereno Dr, Vallejo, CA 94589
- Practice phone
- Call (707) 651-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Yang's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Tien-An Yang is an ophthalmologist in Vallejo, California
Dr. Yang practices at Vallejo Medical Center in Vallejo, California, part of Kaiser Permanente.
Dr. Yang's NPI, 1164570347, was assigned on January 6, 2007. Dr. Yang graduated from JS Weill Medical College, Cornell University in 2003. Dr. Yang holds California license A89469.
- NPI
- 1164570347NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2365540564
- NPI enumeration date
- January 6, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (707) 651-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Tien-An Yang practices at Vallejo Medical Center in Vallejo, California
Dr. Yang's primary practice is Vallejo Medical Center, at 975 Sereno Dr, Vallejo, CA 94589 in Solano County. The practice phone is (707) 651-1000.
- Vallejo Medical Center975 Sereno Dr, Vallejo, CA 94589 · Solano CountyPhone(707) 651-1000
Source: Dmand AI Affiliation Data
Dr. Tien-An Yang is affiliated with 3 sites of care and 1 medical group
Dr. Yang's primary practice is Vallejo Medical Center in Vallejo, California, part of Kaiser Permanente. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links Dr. Yang to 1 more home health agency and 1 hospice, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Tien-An Yang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Yang practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Vallejo Medical Center | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Kaiser Permanente and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Tien-An Yang is one of 2,621 ophthalmologists in California
Ophthalmology is Dr. Yang's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Yang is licensed in California.
Specialties and state licenses
- Ophthalmology, CaliforniaPrimary
Ophthalmologists near Dr. Yang
Counts of ophthalmologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Tien-An Yang billed Medicare for 31 services in 2024
CMS data shows 31 Medicare services from Dr. Yang across 1 procedure code in 2024, all of them office visits, for 19 Medicare patients. Medicare paid $1,700 for them. Every service was in an office.
Dr. Yang's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 182024: 3172%
Dr. Yang compared with the California median for ophthalmologists, 2024
- Dr. Yang
- California median
- Medicare services
- 31vs 1,07997% below
- Medicare patients
- 19vs 42195% below
- Part D claims
- 3,248vs 6185.3 times
Medians across 2,568 ophthalmologists in California with Dmand AI profiles that report each measure.
Dr. Yang's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Yang?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Yang and other ophthalmologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Tien-An Yang treated 19 Medicare patients in 2024, average age 68
CMS counts 19 Medicare patients who saw Dr. Yang in 2024. The largest group is 85 and over, with 0 patients. Their average risk score is 1.04, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Yang's median patient age at 67, with 53% women.
Dr. Yang's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Yang's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women53%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Tien-An Yang wrote 3,344 Medicare Part D claims in 2024
In 2024, Dr. Yang wrote 3,344 Medicare Part D claims for 526 patients. 77% of them were for generic drugs. CMS names the drug for 3,248 of them, across 23 drugs with 11 or more claims each, at $217,527 in total drug cost. In 2023, CMS named 3,017 claims across 22 drugs.
Dr. Yang's Part D claims by kind of drug, 2024
- Generic2,585 claims77%
- Brand-name759 claims23%
Dr. Yang's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3,0172024: 3,2488%
Drugs named by CMS: 23 in 2024, 22 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Tien-An Yang takes part in Medicare
Dr. Yang accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Cataract surgery: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Tien-An Yang received $37 in industry payments in 2024
CMS Open Payments shows 1 general payment to Dr. Yang from 1 drug or device company in 2024. Food and beverage make up the largest share, 100% of the total. Alcon Laboratories Inc paid the most, $37.
Companies that paid Dr. Yang the most, 2024 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Tien-An Yang graduated from JS Weill Medical College, Cornell University
Dr. Yang graduated from JS Weill Medical College, Cornell University in 2003.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Tien-An Yang's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Tien-An Yang
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Tien-An Yang's NPI number?
Dr. Tien-An Yang's NPI number is 1164570347. It was assigned on January 6, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Tien-An Yang?
Dr. Tien-An Yang is an ophthalmologist in Vallejo, California. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. Tien-An Yang practice?
Dr. Yang practices at 975 Sereno Dr, Vallejo, CA 94589. Dr. Yang's primary practice is Vallejo Medical Center in Vallejo, California, part of Kaiser Permanente. Dmand AI also links Dr. Yang to 1 home health agency and 1 hospice.
What is Dr. Tien-An Yang's office phone number?
The practice phone on file for Dr. Yang is (707) 651-1000.
What is Dr. Tien-An Yang's medical license number?
Dr. Yang holds California license A89469.
Which hospitals is Dr. Tien-An Yang affiliated with?
Dr. Yang practices at Vallejo Medical Center in Vallejo, California.
What medical group is Dr. Tien-An Yang part of?
Dr. Yang is linked to The Permanente Medical Group, Inc.
Does Dr. Tien-An Yang accept Medicare?
Yes. CMS data shows Dr. Yang billed Medicare for 31 services in 2024, and Dr. Yang accepts Medicare assignment.
How many Medicare patients does Dr. Tien-An Yang see?
CMS counts 19 Medicare patients who saw Dr. Yang in 2024, with an average age of 68.
What services does Dr. Tien-An Yang bill to Medicare?
In 2024, Dr. Yang's most billed Medicare services were office visit, established patient (99213).
Show 4 more questionsShow fewer questions
Where did Dr. Tien-An Yang go to medical school?
Dr. Yang graduated from JS Weill Medical College, Cornell University in 2003.
What drugs does Dr. Tien-An Yang prescribe most?
In 2024 Medicare Part D data, Dr. Yang's most prescribed drugs by claims were Dorzolamide-Timolol, Latanoprost and Prednisolone Acetate.
Has Dr. Tien-An Yang received payments from drug or device companies?
CMS Open Payments shows $37 in general payments to Dr. Yang from 1 company from 2024 to 2024. The largest total came from Alcon Laboratories Inc.
How long has Dr. Tien-An Yang been practicing?
Dr. Yang graduated from medical school in 2003, 23 years ago.
Selling to ophthalmology practices?
See ophthalmologists in California by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card