Sean James O'Sullivan, MD, PHD
Psychiatry Physician · Austin, TX
Sean James O'Sullivan, MD, PHD is a psychiatry physician with a practice address in Austin, Texas, and NPI 1609514702, issued on May 26, 2022. Check the license (Texas W4561, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Sean James O'Sullivan
- Credential
- MD, PHD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- W4561 TX
Self-reported in NPPES; status is on the state search - Practice location
- 1601 Trinity St, Austin, TX 78712
- Phone
- (833) 882-2737
- Enumerated
- May 26, 2022
- Record last updated
- Jun 30, 2026
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 3,318 in Texas → Look up another NPI →
Also registered at 1601 Trinity St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Sean James O'Sullivan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license W4561Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average psychiatry physician in 2024
199 Medicare Part D claims for 21 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D.
Most prescribed
- Quetiapine Fumarate39 claims
- Divalproex Sodium Er19 claims
- Venlafaxine Hcl Er19 claims
- Sertraline Hcl16 claims
- Gabapentin15 claims
- Clozapine14 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.
Sean James O'Sullivan among 3,318 psychiatry physician records in Texas
Sean James O'Sullivan, MD, PHD is one of 3,318 psychiatry physician records with a practice address in Texas. 72% 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 92% of them.
- NPI issued2022 · 92% of these records are older, 5% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileNo · 45% of these records are
- Record last updated2026 · 49% 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 Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
343 psychiatry physician records list a practice address in Austin
They are 343 of the 26,585 NPPES records with a practice address in Austin, and 3,318 psychiatry physician records in Texas.
All 3,318 in Texas → Every provider in Austin → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Jorge Almeida, MDAustin, TX 787121558709170
- Emily Doyle, M.DAustin, TX 787121962437665
- Melissa Eshelman, MDAustin, TX 787121629069299
- Julie Farrington, MDAustin, TX 787121427114545
- Robert Feinstein, MDAustin, TX 787121003903154
- Alison Hanson, MD, PHDAustin, TX 787121861887127
- Asad Kirmani, MDAustin, TX 787121568485399
- Priya Kumar-Kaparaboyna, M.D.Austin, TX 787121578943411
Common questions
What is Sean James O'Sullivan, MD, PHD's NPI number?
Sean James O'Sullivan, MD, PHD's National Provider Identifier (NPI) is 1609514702, issued on May 26, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Sean James O'Sullivan, MD, PHD located?
The NPPES record lists a practice address at 1601 Trinity St, Austin, TX, 78712. Phone: (833) 882-2737. Providers update this record themselves, so call before visiting.
How can I verify Sean James O'Sullivan, MD, PHD's license?
NPPES lists Texas license number W4561, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Sean James O'Sullivan, MD, PHD prescribe under Medicare Part D?
In 2024, Sean James O'Sullivan, MD, PHD had 199 Medicare Part D claims for 21 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.