Mason Chan, MD
Psychiatry Physician · Tucson, AZ
Mason Chan, MD is a psychiatry physician with a practice address in Tucson, Arizona, and NPI 1275282725, issued on Mar 22, 2022. Check the license on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mason Chan
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 0101279440 VA
Self-reported in NPPES; status is on the state search - Practice location
- 4175 S Alamo Ave, Tucson, AZ 85707
- Phone
- (520) 228-2778
- Enumerated
- Mar 22, 2022
- Record last updated
- Aug 4, 2026
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 942 in Arizona → Look up another NPI →
Also registered at 4175 S Alamo Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mason Chan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical BoardCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average psychiatry physician in 2024
65 Medicare Part D claims, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Olanzapine13 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: $1,094.79
9 payments; by number, the most common kind was food and beverage; the largest payer was Iti, Inc. (d/b/a Intra-Cellular Therapies, Inc.). The 13,693 providers of this specialty with any payment received $4,954.93 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.
Mason Chan among 942 psychiatry physician records in Arizona
Mason Chan, MD is one of 942 psychiatry physician records with a practice address in Arizona. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 91% of them.
- NPI issued2022 · 91% of these records are older, 6% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 41% of these records are
- Record last updated2026 · 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 2084P0800X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
266 psychiatry physician records list a practice address in Tucson
They are 266 of the 18,788 NPPES records with a practice address in Tucson, and 942 psychiatry physician records in Arizona.
All 942 in Arizona → Every provider in Tucson → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Gerald Bunting-Blake, M.D.Davis Monthan Afb, AZ 857071417934662
- Denise Fabian, M.D.Davis Monthan Afb, AZ 857071144457045
- Michael StoddardDavis Monthan Afb, AZ 857071316392079
- Agin Thomas, MDTucson, AZ 857071336502772
- Lucretia Vaughan, MDDm Afb, AZ 857071598929440
- Richard Barnes, M.D.Tucson, AZ 857051417983339
- Aura Lee Motus, M.D.Tucson, AZ 857051336422500
- Samuel Nelson, MDTucson, AZ 857051063443281
Common questions
What is Mason Chan, MD's NPI number?
Mason Chan, MD's National Provider Identifier (NPI) is 1275282725, issued on Mar 22, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Mason Chan, MD located?
The NPPES record lists a practice address at 4175 S Alamo Ave, Tucson, AZ, 85707. Phone: (520) 228-2778. Providers update this record themselves, so call before visiting.
How can I verify Mason Chan, MD's license?
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 Mason Chan, MD prescribe under Medicare Part D?
In 2024, Mason Chan, MD had 65 Medicare Part D claims; the average among psychiatry physician prescribers was 1,000. 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.