Rex Chen Hsei, MD
Ophthalmology Physician · Santa Cruz, CA
Rex Chen Hsei, MD is an ophthalmology physician with a practice address in Santa Cruz, California, and NPI 1285637157, issued on May 24, 2005. Check the license (California A71449, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Rex Chen Hsei
- Credential
- MD
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- A71449 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1665 Dominican Way, Santa Cruz, CA 95065
- Phone
- (831) 475-7012
- Enumerated
- May 24, 2005
- Record last updated
- Jul 13, 2026
- Medicare enrollment
- Enrolled (PECOS I20080805000224); accepts Medicare assignment
- Medical or professional school
- Hahnemann University College Of Medicine, 1996
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 2,899 in California → Look up another NPI →
Also registered at 1665 Dominican Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Melody Agbuya-Flores, O.D.Optometrist1780946012
- Ted Bailey, ODOptometrist1356489959
- Patricia Kubo, MDAnesthesiology Physician1144385253
- Andrew Moreland, M.D.Anesthesiology Physician1649343609
- Aaron Morse, MDPulmonary Disease Physician1093784027
- Orkida Solomon, ODOptometrist1073651683
Verify Rex Chen Hsei in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A71449Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
57% more Medicare Part D claims than the average ophthalmology physician in 2024
2,377 Medicare Part D claims for 527 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 41% of claims.
Most prescribed
- Latanoprost708 claims
- Prednisolone Acetate268 claims
- Ofloxacin237 claims
- Ketorolac Tromethamine236 claims
- Brimonidine Tartrate127 claims
- Timolol Maleate118 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 98.7 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $208.40
2 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. 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
- Bay Eye Medical Group IncSanta Cruz, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Rex Chen Hsei among 2,899 ophthalmology physician records in California
Rex Chen Hsei, MD 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 91% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1996 · median 2001 among the 1,907 with a school on file
- Record last updated2026 · 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 Santa Cruz → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Craig Blackwell, MDSanta Cruz, CA 950651326041195
- Samuel Masters, M.D.Santa Cruz, CA 950651265588784
- Andrew Zhou, MDSanta Cruz, CA 950651245694959
- Joshua Babad, M.D.Santa Cruz, CA 950621902801939
- Robert Jones, M.D.Santa Cruz, CA 950621881738128
- Anna Kesler-Diaz, MDSanta Cruz, CA 950621477767648
- Jason Luksich, MDSanta Cruz, CA 950621225110810
- Robert RosenSanta Cruz, CA 950621093785123
Common questions
What is Rex Chen Hsei, MD's NPI number?
Rex Chen Hsei, MD's National Provider Identifier (NPI) is 1285637157, issued on May 24, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Rex Chen Hsei, MD located?
The NPPES record lists a practice address at 1665 Dominican Way, Santa Cruz, CA, 95065. Phone: (831) 475-7012. Providers update this record themselves, so call before visiting.
How can I verify Rex Chen Hsei, MD's license?
NPPES lists California license number A71449, 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 Rex Chen Hsei, MD prescribe under Medicare Part D?
In 2024, Rex Chen Hsei, MD had 2,377 Medicare Part D claims for 527 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
What is Rex Chen Hsei, MD's MIPS final score?
The 2023 MIPS final score is 98.7 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.