Ray-Young Tsao, MD
Emergency Medicine Physician · Tucson, AZ
Ray-Young Tsao, MD is an emergency medicine physician with a practice address in Tucson, Arizona, and NPI 1245850775, issued on Apr 24, 2020. Check the license (Arizona R77934, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Ray-Young Tsao
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- R77934 AZ
A184474 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1625 N Campbell Ave, Tucson, AZ 85719
- Phone
- (520) 626-7233
- Enumerated
- Apr 24, 2020
- Record last updated
- Jun 15, 2023
- Medicare enrollment
- Enrolled (PECOS I20230626001446); accepts Medicare assignment
- Medical or professional school
- Western Michigan Un Homer Stryker School Of Med, 2020
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,494 in Arizona → Look up another NPI →
Also registered at 1625 N Campbell Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Jonathan Abdo, MDStudent in an Organized Health Care Education/Training Program1811783814
- Kalkidan Abebe, MDInternal Medicine Physician1508435504
- Sameer Aboufadel, DO, MPHEmergency Medicine Physician1639063431
Verify Ray-Young Tsao in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license R77934Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
19% more Medicare Part D claims than the average emergency medicine physician in 2024
268 Medicare Part D claims for 185 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 15 claims were for opioids.
Most prescribed
- Ondansetron Odt30 claims
- Cephalexin25 claims
- Methocarbamol19 claims
- Amoxicillin-Clavulanate Potass17 claims
- Oxycodone Hcl14 claims
- Cefdinir12 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): 94.6 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).
Bills Medicare through 2 group practices
- Cep America - CaliforniaMountain View, CA
- Emergency Physicians Associates San Jose PCSan Jose, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ray-Young Tsao among 1,494 emergency medicine physician records in Arizona
Ray-Young Tsao, MD is one of 1,494 emergency medicine physician records with a practice address in Arizona. 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 2020, is newer than 80% of them.
- NPI issued2020 · 80% of these records are older, 16% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 55% of these records are
- Graduated2020 · median 2014 among the 828 with a school on file
- Record last updated2023 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
422 emergency medicine physician records list a practice address in Tucson
They are 422 of the 18,788 NPPES records with a practice address in Tucson, and 1,494 emergency medicine physician records in Arizona.
All 1,494 in Arizona → Every provider in Tucson → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Francisco AndradeTucson, AZ 857191306377247
- Jeremy Carter, D.O.Tucson, AZ 857191619387271
- Eric Chase, M.D.Tucson, AZ 857191881857910
- James Dahle, MDTucson, AZ 857191811963242
- Bridget Dyer, M.D.Tucson, AZ 857191942473467
- Leah Gilbert, M.D.Tucson, AZ 857191699904185
- Patrick Hollinger, M.D.Tucson, AZ 857191134569957
- Cameron Hypes, M.D.Tucson, AZ 857191376862425
Common questions
What is Ray-Young Tsao, MD's NPI number?
Ray-Young Tsao, MD's National Provider Identifier (NPI) is 1245850775, issued on Apr 24, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Ray-Young Tsao, MD located?
The NPPES record lists a practice address at 1625 N Campbell Ave, Tucson, AZ, 85719. Phone: (520) 626-7233. Providers update this record themselves, so call before visiting.
How can I verify Ray-Young Tsao, MD's license?
NPPES lists Arizona license number R77934, as entered by the provider. Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Ray-Young Tsao, MD prescribe under Medicare Part D?
In 2024, Ray-Young Tsao, MD had 268 Medicare Part D claims for 185 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Ray-Young Tsao, MD's MIPS final score?
The 2023 MIPS final score is 94.6 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.