SEAN JAMES O'SULLIVAN MD, PHD
NPI 1609514702
Psychiatry & Neurology - Psychiatry in Austin, TX

Q: What is Sean O'sullivan's NPI number?

The NPI number for Sean O'sullivan is 1609514702. It was assigned to this individual provider in the NPPES registry on May 26, 2022.

Q: What is Sean O'sullivan's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Q: When was this NPI record last updated?

The NPPES record for Sean O'sullivan was last updated on June 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since May 26, 2022PECOS Enrolled

1601 TRINITY ST, AUSTIN, TX 78712(833) 882-2737 Get Directions Write a Review

NPPES record last updated: June 30, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Sean James O'sullivan Md, Phd NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

SEAN JAMES O'SULLIVAN MD, PHD (NPI 1609514702) is an individual psychiatry provider in Austin, Texas, licensed in Texas (W4561) and active in the NPI registry since May 2022. He is enrolled in Medicare PECOS and is a graduate of Other (2021).

NPPES Registry Identity

NPI1609514702

Entity TypeIndividualMale

Primary Taxonomy2084P0800X

Provider Legal NameSEAN JAMES O'SULLIVANCredential: MD, PHD

Location Address1601 TRINITY STAustin, TX 78712-1765

Mailing AddressPo Box 739960Dallas, TX 75373-9960

Phone(833) 882-2737

Sole ProprietorNo

Medical School CMSOtherGraduated 2021

Enumeration DateMay 26, 2022

Last NPPES UpdateJune 30, 2026

NPPES CertifiedJune 30, 2026

✔ NPI 1609514702 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians

Taxonomy Code2084P0800X

License✔ Licensed in TX · W4561

Definition

A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.

1601 TRINITY ST, Austin, TX 78712

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Harbor Health, Sendero Health Plans, Local Nonprofit.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Sean James O'sullivan Md, Phd is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID7315483468

PECOS Enrollment IDI20260625002264

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Sean O'sullivan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

University Of Texas At Austin Dell Medical School

Same address

General Practice

1601 TRINITY STREET
Austin, TX 78712

Reassigned Medicare billing, Texas enrollment
208 clinicians in this Medicare group

NPI 1073066239 (833) 882-2737

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 78712 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$174.00 typical visit price

range $57.88 – $174.00

Typical copayment $43.50 (range $14.47 – $43.50)

Most-billed visit code 99205

Established Patient

$71.95 typical visit price

range $18.88 – $142.23

Typical copayment $17.98 (range $4.72 – $35.55)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

BENJAMIN JAMES EHRENFELD LCSW

Social Worker (Clinical)

1601 TRINITY ST
AUSTIN, TX 78712

Travis County (512) 495-5300

ROBERT FEINSTEIN MD

Psychiatry & Neurology (Psychiatry)

1601 TRINITY ST
AUSTIN, TX 78712

Travis County (833) 882-2737

DR. AMATYA TARAN MD

Internal Medicine (Critical Care Medicine)

1601 TRINITY ST
AUSTIN, TX 78712

Travis County (833) 882-2737

DR. VEENA A PATEL M.D.

Internal Medicine (Rheumatology)

1601 TRINITY ST
AUSTIN, TX 78712

Travis County (833) 882-2737

FAHEEM MAHOMED M.D.

Physical Medicine & Rehabilitation (Pediatric Rehabilitation Medicine)

1601 TRINITY ST
AUSTIN, TX 78712

Travis County (512) 913-5011

SUE GAIL ECKHARDT MD

Internal Medicine (Medical Oncology)

1601 TRINITY ST
AUSTIN, TX 78712

Travis County (512) 495-5512

MS. ERIN ELIZABETH LOPEZ PA-C

Physician Assistant (Medical)

1601 TRINITY ST, SUITE 704
AUSTIN, TX 78712

Travis County (512) 324-8320

AARON BRAVERMAN LCSW

Social Worker (Clinical)

1601 TRINITY ST
AUSTIN, TX 78712

Travis County (833) 882-2737

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Sean O'sullivan's NPI number?

The NPI number for Sean O'sullivan is 1609514702. It was assigned to this individual provider in the NPPES registry on May 26, 2022.

Where is Sean O'sullivan located?

Sean O'sullivan practices at 1601 Trinity St, Austin, TX 78712. The listed phone number is (833) 882-2737.

What is Sean O'sullivan's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Is Sean O'sullivan enrolled in Medicare?

Yes. Sean O'sullivan is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Sean O'sullivan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Sean O'sullivan reassigns Medicare benefits to University Of Texas At Austin Dell Medical School (Austin, TX). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Sean O'sullivan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Sean O'sullivan accept?

Health plans from Harbor Health and Sendero Health Plans, Local Nonprofit list Sean O'sullivan as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Sean O'sullivan was last updated on June 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.