Doris Tiu Tan, D.O.
Psychiatry Physician · Fresno, CA
Doris Tiu Tan, D.O. is a psychiatry physician with a practice address in Fresno, California, and NPI 1578522462, issued on Mar 21, 2006. Check the license (California 20A7928, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Doris Tiu Tan
- Credential
- D.O.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License numbers
- 20A7928 CA
OS11210 FL
Self-reported in NPPES; status is on the state search - Practice location
- 2550 W Clinton Ave, Fresno, CA 93705
- Phone
- (559) 264-7521
- Enumerated
- Mar 21, 2006
- Record last updated
- Jun 20, 2023
- Medicaid ID
- 003193700 FL
- Medicare enrollment
- Enrolled (PECOS I20050405001341); accepts Medicare assignment
- Medical or professional school
- Ohio Medical University, 1987
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Also registered at 2550 W Clinton Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Anna AllenPeer Specialist1154733863
- Velvet AllenAddiction (Substance Use Disorder) Counselor1467618124
- Christina AlvarezCase Manager/Care Coordinator1619235330
- Gladys Avila, LMFTMarriage & Family Therapist1578861191
- Diane BarelaCounselor1790174720
- Jennifer Bates, LCSWClinical Social Worker1316087638
Verify Doris Tiu Tan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A7928Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
45% more Medicare Part D claims than the average psychiatry physician in 2024
1,445 Medicare Part D claims for 84 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims.
Most prescribed
- Olanzapine114 claims
- Trazodone Hcl108 claims
- Invega Sustenna95 claims
- Aripiprazole89 claims
- Bupropion Xl85 claims
- Risperidone70 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: $767.34
25 payments; by number, the most common kind was food and beverage; the largest payer was Alkermes, 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.
Bills Medicare through one group practice
- Mental Health Systems, Inc.Fresno, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Doris Tiu Tan among 8,673 psychiatry physician records in California
Doris Tiu Tan, D.O. is one of 8,673 psychiatry physician records with a practice address in California. 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 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 67% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 38% of these records are
- Graduated1987 · median 2005 among the 3,295 with a school on file
- Record last updated2023 · 54% 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 California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatry Physician providers in California
There are 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in Fresno → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Diane Kecskes, M.DFresno, CA 937051649208638
- Barrett Levine, M.D.Fresno, CA 937051114087533
- Herbert Cruz, MDFresno, CA 937061023107513
- Richard Land, D.O.Fresno, CA 937041497880017
- Ana Mendoza, M.DFresno, CA 937041922017698
- Robert Oldham, M.D.Fresno, CA 937061356379507
- Frederick Reinfurt, M.D.Fresno, CA 937041790081669
- William Siegfried, M.D.Fresno, CA 937041821162041
Common questions
What is Doris Tiu Tan, D.O.'s NPI number?
Doris Tiu Tan, D.O.'s National Provider Identifier (NPI) is 1578522462, issued on Mar 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Doris Tiu Tan, D.O. located?
The NPPES record lists a practice address at 2550 W Clinton Ave, Fresno, CA, 93705. Phone: (559) 264-7521. Providers update this record themselves, so call before visiting.
How can I verify Doris Tiu Tan, D.O.'s license?
NPPES lists California license number 20A7928, 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 Doris Tiu Tan, D.O. prescribe under Medicare Part D?
In 2024, Doris Tiu Tan, D.O. had 1,445 Medicare Part D claims for 84 beneficiaries; 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.