Dr. Courtney Ann O'Brien, DO
- Medicare services, 2024
- 1,967
- Medicare patients, 2024
- 291
- Part D claims, 2024
- 1,327
- Publications
- 2
- MIPS score, 2024
- 88
- Practice address
- 5767 W Century Blvd, Los Angeles, CA 90045
- Practice phone
- Call (310) 794-1276
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
UCLA Medical Plaza
Los Angeles, California
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. Courtney Ann O'Brien is a rheumatologist in Los Angeles, California
Dr. O'Brien practices at UCLA Medical Plaza in Los Angeles, California.
Dr. O'Brien's NPI, 1609396514, was assigned on June 21, 2017. Dr. O'Brien graduated from Dr. Kiran C. Patel College of Osteopathic Medicine in 2013. Dr. O'Brien holds California license 20A18469.
- NPI
- 1609396514NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9537430020
- NPI enumeration date
- June 21, 2017
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (310) 794-1276
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 35
- Medical school graduation
- 2013
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Courtney Ann O'Brien practices at UCLA Medical Plaza in Los Angeles, California
Dr. O'Brien's primary practice is UCLA Medical Plaza, at 5767 W Century Blvd, Los Angeles, CA 90045 in Los Angeles County. The practice phone is (310) 794-1276.
- UCLA Medical Plaza5767 W Century Blvd, Los Angeles, CA 90045 · Los Angeles CountyPhone(310) 794-1276
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Courtney Ann O'Brien is affiliated with 5 sites of care and 1 medical group
Dr. O'Brien's primary practice is UCLA Medical Plaza in Los Angeles, California. Dr. O'Brien is also affiliated with Ronald Reagan UCLA Medical Center. The medical group on file is UCLA Medical Group. Dmand AI also links Dr. O'Brien to 2 more hospitals and 1 group practice or clinic, each named with a free account.
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. Courtney Ann O'Brien's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. O'Brien practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UCLA Medical Plaza | Available with a free account |
| +4 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Courtney Ann O'Brien is one of 821 rheumatologists in California
Rheumatology is Dr. O'Brien's primary specialty in the NPI Registry, under taxonomy code 207RR0500X. Dr. O'Brien is board certified in internal medicine by the American Board of Internal Medicine. Dr. O'Brien is licensed in California.
Specialties and state licenses
- Rheumatology, CaliforniaPrimary
Clinical focus
Dmand AI lists acid reflux, arteritis, arthritis, bursitis, chronic kidney disease, cirrhosis of the liver, enthesopathy in arms and enthesopathy in foot or ankle among the conditions Dr. O'Brien treats.
Rheumatologists near Dr. O'Brien
Counts of rheumatologists 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. Courtney Ann O'Brien billed Medicare for 1,967 services in 2024
CMS data shows 1,967 Medicare services from Dr. O'Brien across 11 procedure codes in 2024, for 291 Medicare patients. Medicare paid $94,810 for them. Every service was in an office.
Dr. O'Brien's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 02024: 960
- Office and hospital visits
- 2023: 5182024: 57210%
- Other services
- 2023: 02024: 343
- Tests and treatments
- 2023: 132024: 44238%
- Surgery
- 2023: 422024: 2833%
- Imaging
- 2023: 142024: 2043%
Dr. O'Brien compared with the California median for rheumatologists, 2024
- Dr. O'Brien
- California median
- Medicare services
- 1,967vs 9002.2 times
- Medicare patients
- 291vs 21635% above
- Part D claims
- 1,081vs 96212% above
Medians across 773 rheumatologists in California with Dmand AI profiles that report each measure.
Dr. O'Brien'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'Brien and other rheumatologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Courtney Ann O'Brien treated 291 Medicare patients in 2024, average age 72
CMS counts 291 Medicare patients who saw Dr. O'Brien in 2024. The largest group is 65 to 74, with 151 patients. 75% of them have arthritis, and 75% have high blood pressure. 22% are also on Medicaid. Their average risk score is 1.40, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. O'Brien's median patient age at 61, with 75% women.
Dr. O'Brien's Medicare patients by age, 2024
Dr. O'Brien's Medicare patients by sex, 2024
- Women22979%
- Men6221%
Chronic conditions among Dr. O'Brien's Medicare patients, 2024
- Arthritis75%
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease39%
- Osteoporosis38%
- Diabetes32%
- Anxiety28%
- Mood disorders28%
Share of Medicare patients with each condition. A patient can have several.
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 61
Patient panel by sex, all payers
- Women75%
- Men23%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Courtney Ann O'Brien wrote 1,327 Medicare Part D claims in 2024
In 2024, Dr. O'Brien wrote 1,327 Medicare Part D claims for 266 patients. 85% of them were for generic drugs. CMS names the drug for 1,081 of them, across 29 drugs with 11 or more claims each, at $639,118 in total drug cost. In 2023, CMS named 666 claims across 19 drugs.
Dr. O'Brien's Part D claims by kind of drug, 2024
- Generic1,125 claims85%
- Brand-name and other202 claims15%
Dr. O'Brien's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. O'Brien's Part D claims, 2024
- Opioids2%28 of 1,327 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 6662024: 1,08162%
Drugs named by CMS: 29 in 2024, 19 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Courtney Ann O'Brien scored 88 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 88 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. CMS lists Dr. O'Brien as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. O'Brien's MIPS scores, performance year 2024
- 88of 100Final score
- 79.4of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 74of 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
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Dr. Courtney Ann O'Brien has 2 publications on record
Dmand AI links 2 papers to Dr. O'Brien in 2019. 2019 was the busiest year, with 2. Dr. O'Brien's most frequent co-authors are Joel A. Block, MD, Sarfaraz Hasni, MD and Nancy S. Reau, MD.
Dr. O'Brien's most frequent co-authors
Recent publications by Dr. O'Brien
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 rheumatologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Courtney Ann O'Brien received $565 in industry payments from 2021 to 2025
CMS Open Payments shows 12 general payments to Dr. O'Brien from 8 drug and device companies from 2021 to 2025. Food and beverage make up the largest share, 100% of the total. AstraZeneca Pharmaceuticals LP paid the most, $125.
General payments to Dr. O'Brien by program year, 2021 to 2025
Companies that paid Dr. O'Brien the most, 2021 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Courtney Ann O'Brien graduated from Dr. Kiran C. Patel College of Osteopathic Medicine
Dr. O'Brien graduated from Dr. Kiran C. Patel College of Osteopathic Medicine in 2013.
- Medical school
- Board certified in internal medicine
- Board certified in rheumatology
- Board certified in 2020 - 2026
- Board certified in 2017 - 2020
Source: Dmand AI Professional Profile Data
Dr. Courtney Ann O'Brien accepts plans from 16 insurance carriers
Dr. O'Brien is in network with 16 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Elevance
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Regence Health Plans
- Alliant Health Plans
- +8 more carriersWith a free account
Plan types Dr. O'Brien accepts, by number of carriers
- PPO9
- HMO7
- Medicare7
- POS5
- EPO4
Source: Dmand AI Insurance Network Data
Sources for Dr. Courtney Ann O'Brien'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 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) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - 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)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 |
| 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. Courtney Ann O'Brien
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. Courtney Ann O'Brien's NPI number?
Dr. Courtney Ann O'Brien's NPI number is 1609396514. It was assigned on June 21, 2017, and it is active in the NPI Registry.
What kind of doctor is Dr. Courtney Ann O'Brien?
Dr. Courtney Ann O'Brien is a rheumatologist in Los Angeles, California. The primary specialty in the NPI Registry is Rheumatology Physician (taxonomy code 207RR0500X).
Where does Dr. Courtney Ann O'Brien practice?
Dr. O'Brien practices at 5767 W Century Blvd, Los Angeles, CA 90045. Dr. O'Brien's primary practice is UCLA Medical Plaza in Los Angeles, California. Dmand AI also links Dr. O'Brien to 2 hospitals and 1 group practice or clinic.
What is Dr. Courtney Ann O'Brien's office phone number?
The practice phone on file for Dr. O'Brien is (310) 794-1276.
What is Dr. Courtney Ann O'Brien's medical license number?
Dr. O'Brien holds California license 20A18469.
Which hospitals is Dr. Courtney Ann O'Brien affiliated with?
Dr. O'Brien is affiliated with Ronald Reagan UCLA Medical Center. Dmand AI links Dr. O'Brien to 2 more hospitals.
What medical group is Dr. Courtney Ann O'Brien part of?
Dr. O'Brien is linked to UCLA Medical Group.
Does Dr. Courtney Ann O'Brien accept Medicare?
Yes. CMS data shows Dr. O'Brien billed Medicare for 1,967 services in 2024, and Dr. O'Brien accepts Medicare assignment.
Does Dr. Courtney Ann O'Brien offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. O'Brien as offering telehealth services.
What is Dr. Courtney Ann O'Brien's MIPS score?
Dr. O'Brien's MIPS final score for performance year 2024 is 88 out of 100, reported as part of a group.
Show 10 more questionsShow fewer questions
How many Medicare patients does Dr. Courtney Ann O'Brien see?
CMS counts 291 Medicare patients who saw Dr. O'Brien in 2024, with an average age of 72.
Is Dr. Courtney Ann O'Brien board certified?
Yes. Dr. O'Brien is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Courtney Ann O'Brien bill to Medicare?
In 2024, Dr. O'Brien's most billed Medicare services were injected or infused drug (J0897), office visit, established patient (99214) and medicare service (G2211).
Where did Dr. Courtney Ann O'Brien go to medical school?
Dr. O'Brien graduated from Dr. Kiran C. Patel College of Osteopathic Medicine in 2013.
What drugs does Dr. Courtney Ann O'Brien prescribe most?
In 2024 Medicare Part D data, Dr. O'Brien's most prescribed drugs by claims were Hydroxychloroquine Sulfate, Gabapentin and Methotrexate.
Has Dr. Courtney Ann O'Brien received payments from drug or device companies?
CMS Open Payments shows $565 in general payments to Dr. O'Brien from 8 companies from 2021 to 2025. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Dr. Courtney Ann O'Brien been practicing?
Dr. O'Brien graduated from medical school in 2013, 13 years ago.
Does Dr. Courtney Ann O'Brien do research?
Dmand AI links 2 publications to Dr. O'Brien.
Who does Dr. Courtney Ann O'Brien publish with?
Dr. O'Brien's most frequent co-authors are Joel A. Block, MD (1 shared paper), Sarfaraz Hasni, MD (1 shared paper) and Nancy S. Reau, MD (1 shared paper).
What insurance does Dr. Courtney Ann O'Brien accept?
Dr. O'Brien is in network with 16 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
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