Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Sean James O'Sullivan, MD, PHD

Individual provider Psychiatry Physician · NPI 1609514702

Sean James O'Sullivan, MD, PHD is a Psychiatry in Austin, Texas. Qualified in 2021, 5 years ago. Licensed in Texas.

Years since qualifying
5
Licensed in
TX
In the registry since
2022
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

1601 Trinity St
Austin, TX 78712-1765
Phone: (833) 882-2737
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychiatry Physician (primary) Taxonomy 2084P0800X · Licence W4561 (TX)

Record details

NPI number1609514702
Entity typeIndividual (Type 1)
GenderMale
Credentials MD , PHD
Sole proprietorNo
NPI enumeratedMay 26, 2022
Last updated in NPPESJune 30, 2026
Certification dateJune 30, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyPSYCHIATRY
Medical schoolOTHER
Graduated 2021 (5 years in practice)
Accepts Medicare assignment Not indicated

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