Justin Marshall O'Brien, MD
Psychiatry Physician · Irving, TX
Justin Marshall O'Brien, MD is a psychiatry physician with a practice address in Irving, Texas, and NPI 1306423017, issued on Mar 27, 2021. Check the license (Texas U3969, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Justin Marshall O'Brien
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- U3969 TX
Self-reported in NPPES; status is on the state search - Practice location
- 4441 W Airport Fwy Ste 215, Irving, TX 75062
- Phone
- (469) 913-6136
- Enumerated
- Mar 27, 2021
- Record last updated
- Dec 4, 2025
- Medicare enrollment
- Enrolled (PECOS I20250627003913); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 3,318 in Texas → Look up another NPI →
Also registered at 4441 W Airport Fwy Ste 215
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Raphael Ye, DOInterventional Pain Medicine Physician1326314584
- Stephanie Yianitsas, PA-CPhysician Assistant1215824040
Verify Justin Marshall O'Brien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license U3969Check 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
204 Medicare Part D claims for 24 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D.
Most prescribed
- Bupropion Xl29 claims
- Escitalopram Oxalate17 claims
- Sertraline Hcl16 claims
- Clozapine14 claims
- Hydroxyzine Hcl13 claims
- Trazodone Hcl13 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.
Bills Medicare through one group practice
- Iconiq Spine And Orthopaedic Center, PLLCIrving, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Justin Marshall O'Brien among 3,318 psychiatry physician records in Texas
Justin Marshall O'Brien, MD 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 2021, is newer than 89% of them.
- NPI issued2021 · 89% of these records are older, 8% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 45% of these records are
- Graduated2021 · median 2006 among the 1,481 with a school on file
- Record last updated2025 · 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).
Psychiatry Physician providers in Texas
There are 3,318 psychiatry physician records in Texas.
All 3,318 in Texas → Every provider in Irving → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Madeline Andrew, M.D.Irving, TX 750621861619538
- Abila Awan, M.D.Irving, TX 750621952486979
- Harold Cronson, M.D.Irving, TX 750621619924800
- Nicholas Heyne, M.D.Irving, TX 750621356662118
- Mehmooda Nasir, M.D.Irving, TX 750621790944510
- Fatima Saherwala, MDIrving, TX 750621962585141
- Rajshree Bongale, M.D.Irving, TX 750631770641805
- Xueling Fu, M.DIrving, TX 750611013149129
Common questions
What is Justin Marshall O'Brien, MD's NPI number?
Justin Marshall O'Brien, MD's National Provider Identifier (NPI) is 1306423017, issued on Mar 27, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Justin Marshall O'Brien, MD located?
The NPPES record lists a practice address at 4441 W Airport Fwy Ste 215, Irving, TX, 75062. Phone: (469) 913-6136. Providers update this record themselves, so call before visiting.
How can I verify Justin Marshall O'Brien, MD's license?
NPPES lists Texas license number U3969, 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 Justin Marshall O'Brien, MD prescribe under Medicare Part D?
In 2024, Justin Marshall O'Brien, MD had 204 Medicare Part D claims for 24 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.