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Dr. William T. O'Brien Sr., DO
NPI1316046899PAC ID8527379353
- Publications
- 15
- MIPS score, 2024
- 80
- Hospital affiliations
- 1
- Medical groups
- 2
- Insurance carriers
- 11
- Practice address
- 92 W Miller St, Orlando, FL 32806
- Practice phone
- Call (407) 650-5028
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Arnold Palmer Hospital for Children
Orlando, Florida
Find Dr. O'Brien's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. William T. O'Brien Sr. is a diagnostic radiologist in Orlando, Florida
Dr. O'Brien practices at Arnold Palmer Hospital for Children in Orlando, Florida.
Dr. O'Brien's NPI, 1316046899, was assigned on September 21, 2006. Dr. O'Brien graduated from Pcom in 2003. Dr. O'Brien holds Florida license OS18400.
NPI and contact details
- NPI
- 1316046899NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8527379353
- NPI enumeration date
- September 21, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (407) 650-5028
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William T. O'Brien Sr. practices at Arnold Palmer Hospital for Children in Orlando, Florida
Dr. O'Brien's primary practice is Arnold Palmer Hospital for Children, at 92 W Miller St, Orlando, FL 32806 in Orange County. The practice phone is (407) 650-5028.
- Arnold Palmer Hospital for Children92 W Miller St, Orlando, FL 32806 · Orange CountyPhone(407) 650-5028
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. William T. O'Brien Sr. is affiliated with 2 sites of care and 2 medical groups
Dr. O'Brien's primary practice is Arnold Palmer Hospital for Children in Orlando, Florida. Dr. O'Brien is also affiliated with Orlando Regional Medical Center. The medical group on file is Orlando Health Medical Group. Dmand AI also links Dr. O'Brien to 1 more medical group, named with a free account.
Arnold Palmer Hospital for ChildrenPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. William T. O'Brien Sr.'s practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. O'Brien practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Arnold Palmer Hospital for Children | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William T. O'Brien Sr. is one of 2,422 diagnostic radiologists in Florida
Diagnostic radiology is Dr. O'Brien's primary specialty in the NPI Registry, under taxonomy code 2085R0202X. Dr. O'Brien is board certified in diagnostic radiology by the American Board of Radiology. Dmand AI has Dr. O'Brien's licenses on file in 3 states: Florida, California and Ohio.
Specialties and state licenses
- Diagnostic radiology, FloridaPrimary
- California license
- Neuroradiology, Ohio
Diagnostic radiologists near Dr. O'Brien
Counts of diagnostic radiologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. William T. O'Brien Sr.'s patients have a median age of 11
Across all payers, Dmand AI patient panel data puts Dr. O'Brien's median patient age at 11, with 49% women.
Dr. O'Brien's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 11
Patient panel by sex, all payers
- Women49%
- Men51%
Source: Dmand AI Patient Panel Data
Dr. William T. O'Brien Sr. scored 80 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 80 out of 100 for Dr. O'Brien for performance year 2024, reported as part of a group. Dr. O'Brien accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. O'Brien's MIPS scores, performance year 2024
- 80of 100Final score
- 61.2of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 72of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
Dr. William T. O'Brien Sr. has 15 publications on record
Dmand AI links 15 papers to Dr. O'Brien, published from 2002 to 2018. 2015 was the busiest year, with 3. The most frequent topics are Tomography, X-Ray Computed, Magnetic Resonance Imaging and Community-Acquired Infections. Dr. O'Brien's most frequent co-authors are Brian C. Dahlin, MD, Anders John Davidson, MD and Joseph Michael Galante, MD.
Papers15
Years published2002 to 2018
Dr. O'Brien's papers by year, 2002 to 2018
Topics Dr. O'Brien writes about most
- Tomography, X-Ray Computed
- Magnetic Resonance Imaging
- Community-Acquired Infections
- Craniocerebral Trauma
- Pneumonia
- Spinal Cord
Dr. O'Brien's most frequent co-authors
- Brian C. Dahlin, MD1 shared paper
- Anders John Davidson, MD1 shared paper
- Joseph Michael Galante, MD1 shared paper
Recent publications by Dr. O'Brien
J Neurointerv Surg
AneurysmBasilar ArteryCarotid Artery, Internal
See who Dr. O'Brien researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. O'Brien works with, so you can find a warm path to the right diagnostic radiologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. William T. O'Brien Sr. graduated from Pcom
Dr. O'Brien graduated from Pcom in 2003.
- Medical school
- Board certified in diagnostic radiology
- Board certified in neuroradiology
- Board certified in 2005 - 2018
- Board certified in 2021 - 2026
- Board certified in 2016 - 2022
- Board certified in 2016 - 2022
Source: Dmand AI Professional Profile Data
Dr. William T. O'Brien Sr. accepts plans from 11 insurance carriers
Dr. O'Brien is in network with 11 carriers, including Cigna, United Healthcare and AR State Medicaid. Medicaid plans come from the most carriers, 5. Check the plan with the practice before a visit.
- Cigna
- United Healthcare
- AR State Medicaid
- Blue Cross and Blue Shield of Kansas City
- CMS Medicare
- Elevance
- GA State Medicaid
- HCSC
- +3 more carriersWith a free account
Plan types Dr. O'Brien accepts, by number of carriers
- Medicaid5
- HMO3
- Medicare3
- PPO2
- EPO1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. William T. O'Brien Sr.'s profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. William T. O'Brien Sr.
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. William T. O'Brien Sr.'s NPI number?
Dr. William T. O'Brien Sr.'s NPI number is 1316046899. It was assigned on September 21, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. William T. O'Brien Sr.?
Dr. William T. O'Brien Sr. is a diagnostic radiologist in Orlando, Florida. The primary specialty in the NPI Registry is Diagnostic Radiology Physician (taxonomy code 2085R0202X).
Where does Dr. William T. O'Brien Sr. practice?
Dr. O'Brien practices at 92 W Miller St, Orlando, FL 32806. Dr. O'Brien's primary practice is Arnold Palmer Hospital for Children in Orlando, Florida. Dmand AI also links Dr. O'Brien to 1 medical group.
What is Dr. William T. O'Brien Sr.'s office phone number?
The practice phone on file for Dr. O'Brien is (407) 650-5028.
What is Dr. William T. O'Brien Sr.'s medical license number?
Dr. O'Brien holds Florida license OS18400, one of the licenses on file in 3 states.
Which states has Dr. William T. O'Brien Sr. been licensed in?
Dmand AI has state licenses on file for Dr. O'Brien in Florida, California and Ohio.
Which hospitals is Dr. William T. O'Brien Sr. affiliated with?
Dr. O'Brien is affiliated with Orlando Regional Medical Center.
What medical group is Dr. William T. O'Brien Sr. part of?
Dr. O'Brien is linked to Orlando Health Medical Group. Dmand AI links Dr. O'Brien to 1 more medical group.
Does Dr. William T. O'Brien Sr. accept Medicare?
Yes. CMS lists Dr. O'Brien as accepting Medicare assignment.
What is Dr. William T. O'Brien Sr.'s MIPS score?
Dr. O'Brien's MIPS final score for performance year 2024 is 80 out of 100, reported as part of a group.
Show 6 more questionsShow fewer questions
Is Dr. William T. O'Brien Sr. board certified?
Yes. Dr. O'Brien is board certified in diagnostic radiology by the American Board of Radiology.
Where did Dr. William T. O'Brien Sr. go to medical school?
Dr. O'Brien graduated from Pcom in 2003.
How long has Dr. William T. O'Brien Sr. been practicing?
Dr. O'Brien graduated from medical school in 2003, 23 years ago.
Does Dr. William T. O'Brien Sr. do research?
Dmand AI links 15 publications to Dr. O'Brien, published from 2002 to 2018.
Who does Dr. William T. O'Brien Sr. publish with?
Dr. O'Brien's most frequent co-authors are Brian C. Dahlin, MD (1 shared paper), Anders John Davidson, MD (1 shared paper) and Joseph Michael Galante, MD (1 shared paper).
What insurance does Dr. William T. O'Brien Sr. accept?
Dr. O'Brien is in network with 11 carriers, including Cigna, United Healthcare and AR State Medicaid. Medicaid plans come from the most carriers, 5. Check the plan with the practice before a visit.
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