Dr. Thaddeus J. O'Barr IV, MD
- Medicare services, 2024
- 137
- Medicare patients, 2024
- 209
- Hospital affiliations
- 1
- Industry payments
- $184
- Medical groups
- 13
- Practice address
- 101 City Drive South, Orange, CA 92868
- Practice phone
- Call (714) 456-7890
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. O'Barr'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. Thaddeus J. O'Barr IV is an anesthesiologist in Orange, California
Dr. O'Barr practices at UCI Health - Orange in Orange, California, part of UC Irvine.
Dr. O'Barr's NPI, 1609168814, was assigned on May 5, 2011. Dr. O'Barr graduated from UC Irvine School of Medicine in 2011. Dr. O'Barr holds California license A124438.
- NPI
- 1609168814NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6305074410
- NPI enumeration date
- May 5, 2011
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (714) 456-7890
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 41
- Medical school graduation
- 2011
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Thaddeus J. O'Barr IV practices at UCI Health - Orange in Orange, California
Dr. O'Barr's primary practice is UCI Health - Orange, at 101 City Drive South, Orange, CA 92868 in Orange County. The practice phone is (714) 456-7890.
- UCI Health - Orange101 City Drive South, Orange, CA 92868 · Orange CountyPhone(714) 456-7890
Source: Dmand AI Affiliation Data
Dr. Thaddeus J. O'Barr IV is affiliated with 6 sites of care and 13 medical groups
Dr. O'Barr's primary practice is UCI Health - Orange in Orange, California, part of UC Irvine. The medical group on file is Allied Anesthesia Medical Group. Dmand AI also links Dr. O'Barr to 12 more medical groups, 4 group practices and clinics and 1 ambulatory surgery center, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Thaddeus J. O'Barr IV's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. O'Barr practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UCI Health - Orange | Available with a free account |
| +5 more sites and 12 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Thaddeus J. O'Barr IV is one of 6,593 anesthesiologists in California
Anesthesiology is Dr. O'Barr's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. O'Barr is board certified in anesthesiology by the American Board of Anesthesiology. Dr. O'Barr is licensed in California.
Specialties and state licenses
- Anesthesiology, CaliforniaPrimary
Anesthesiologists near Dr. O'Barr
Counts of anesthesiologists 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. Thaddeus J. O'Barr IV billed Medicare for 137 services in 2024
CMS data shows 137 Medicare services from Dr. O'Barr across 9 procedure codes in 2024, for 209 Medicare patients. Medicare paid $14,274 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. O'Barr's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Anesthesia
- 2023: 862024: 6920%
- Surgery
- 2023: 742024: 4934%
- Imaging
- 2023: 342024: 1944%
Dr. O'Barr compared with the California median for anesthesiologists, 2024
- Dr. O'Barr
- California median
- Medicare services
- 137vs 7290% above
- Medicare patients
- 209vs 14346% above
Medians across 5,562 anesthesiologists in California with Dmand AI profiles that report each measure.
Dr. O'Barr's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. O'Barr and other anesthesiologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Thaddeus J. O'Barr IV treated 209 Medicare patients in 2024, average age 74
CMS counts 209 Medicare patients who saw Dr. O'Barr in 2024. The largest group is 65 to 74, with 104 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 22% are also on Medicaid. Their average risk score is 2.07, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. O'Barr's median patient age at 64, with 56% women.
Dr. O'Barr's Medicare patients by age, 2024
Dr. O'Barr's Medicare patients by sex, 2024
- Women10148%
- Men10852%
Chronic conditions among Dr. O'Barr's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis58%
- Diabetes39%
- Chronic kidney disease38%
- Ischemic heart disease33%
- Mood disorders31%
- Depression28%
Share of Medicare patients with each condition. A patient can have several.
Dr. O'Barr's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 64
Patient panel by sex, all payers
- Women56%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Thaddeus J. O'Barr IV takes part in Medicare
Dr. O'Barr accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Thaddeus J. O'Barr IV received $184 in industry payments from 2016 to 2022
CMS Open Payments shows 5 general payments to Dr. O'Barr from 4 drug and device companies from 2016 to 2022. Consulting fees make up the largest share, 54% of the total. Merck Sharp & Dohme Corporation paid the most, $100.
General payments to Dr. O'Barr by program year, 2016 to 2022
General payments to Dr. O'Barr by kind, 2016 to 2022
- Consulting fees$10054%
- Food and beverage$8446%
Companies that paid Dr. O'Barr the most, 2016 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Thaddeus J. O'Barr IV graduated from UC Irvine School of Medicine
Dr. O'Barr graduated from UC Irvine School of Medicine in 2011.
- Medical school
- Board certified in anesthesiology
Source: Dmand AI Professional Profile Data
Dr. Thaddeus J. O'Barr IV accepts plans from 1 insurance carrier
Dr. O'Barr is in network with 1 carrier, including CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
- CMS Medicare
Source: Dmand AI Insurance Network Data
Sources for Dr. Thaddeus J. O'Barr IV'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Thaddeus J. O'Barr IV
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. Thaddeus J. O'Barr IV's NPI number?
Dr. Thaddeus J. O'Barr IV's NPI number is 1609168814. It was assigned on May 5, 2011, and it is active in the NPI Registry.
What kind of doctor is Dr. Thaddeus J. O'Barr IV?
Dr. Thaddeus J. O'Barr IV is an anesthesiologist in Orange, California. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. Thaddeus J. O'Barr IV practice?
Dr. O'Barr practices at 101 City Drive South, Orange, CA 92868. Dr. O'Barr's primary practice is UCI Health - Orange in Orange, California, part of UC Irvine. Dmand AI also links Dr. O'Barr to 12 medical groups, 4 group practices and clinics and 1 ambulatory surgery center.
What is Dr. Thaddeus J. O'Barr IV's office phone number?
The practice phone on file for Dr. O'Barr is (714) 456-7890.
What is Dr. Thaddeus J. O'Barr IV's medical license number?
Dr. O'Barr holds California license A124438.
Which hospitals is Dr. Thaddeus J. O'Barr IV affiliated with?
Dr. O'Barr practices at UCI Health - Orange in Orange, California.
What medical group is Dr. Thaddeus J. O'Barr IV part of?
Dr. O'Barr is linked to Allied Anesthesia Medical Group. Dmand AI links Dr. O'Barr to 12 more medical groups.
Does Dr. Thaddeus J. O'Barr IV accept Medicare?
Yes. CMS data shows Dr. O'Barr billed Medicare for 137 services in 2024, and Dr. O'Barr accepts Medicare assignment.
How many Medicare patients does Dr. Thaddeus J. O'Barr IV see?
CMS counts 209 Medicare patients who saw Dr. O'Barr in 2024, with an average age of 74.
Is Dr. Thaddeus J. O'Barr IV board certified?
Yes. Dr. O'Barr is board certified in anesthesiology by the American Board of Anesthesiology.
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What services does Dr. Thaddeus J. O'Barr IV bill to Medicare?
In 2024, Dr. O'Barr's most billed Medicare services were surgery: brain, spine and nerves (64447), ultrasound (76942) and anesthesia (00731).
Where did Dr. Thaddeus J. O'Barr IV go to medical school?
Dr. O'Barr graduated from UC Irvine School of Medicine in 2011.
Has Dr. Thaddeus J. O'Barr IV received payments from drug or device companies?
CMS Open Payments shows $184 in general payments to Dr. O'Barr from 4 companies from 2016 to 2022. The largest total came from Merck Sharp & Dohme Corporation.
How long has Dr. Thaddeus J. O'Barr IV been practicing?
Dr. O'Barr graduated from medical school in 2011, 15 years ago.
What insurance does Dr. Thaddeus J. O'Barr IV accept?
Dr. O'Barr is in network with 1 carrier, including CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
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