Bridget Ann O'Brien, PA
- Medicare patients, 2024
- 47
- Part D claims, 2024
- 43
- MIPS score, 2024
- 93
- Hospital affiliations
- 3
- Industry payments
- $29
- Practice address
- 1600 N Rose Ave, Oxnard, CA 93030
- Practice phone
- Call (805) 988-2500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Bridget 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.
Bridget Ann O'Brien is a physician assistant in Oxnard, California
Bridget O'Brien practices at Dignity Health - St. John's Regional Medical Center in Oxnard, California, part of CommonSpirit Health.
Bridget O'Brien's NPI, 1144453457, was assigned on September 2, 2009. Bridget O'Brien holds California license PA60390.
- NPI
- 1144453457NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4981741907
- NPI enumeration date
- September 2, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (805) 988-2500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 43
- Medical school graduation
- 2009
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Bridget Ann O'Brien practices at Dignity Health - St. John's Regional Medical Center in Oxnard, California
Bridget O'Brien's primary practice is Dignity Health - St. John's Regional Medical Center, at 1600 N Rose Ave, Oxnard, CA 93030 in Ventura County. The practice phone is (805) 988-2500.
- Dignity Health - St. John's Regional Medical Center1600 N Rose Ave, Oxnard, CA 93030 · Ventura CountyPhone(805) 988-2500
Source: Dmand AI Affiliation Data
Bridget Ann O'Brien is affiliated with 4 sites of care and 3 medical groups
Bridget O'Brien's primary practice is Dignity Health - St. John's Regional Medical Center in Oxnard, California, part of CommonSpirit Health. Bridget O'Brien is also affiliated with Cedars-Sinai Medical Center. The medical group on file is Cedars-Sinai Medical Center. Dmand AI also links Bridget O'Brien to 1 more hospital, 2 medical groups and 1 group practice or clinic, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Bridget Ann O'Brien's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Bridget O'Brien practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dignity Health - St. John's Regional Medical Center | Available with a free account |
| +3 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Bridget Ann O'Brien is one of 11,482 physician assistants in California
Physician assistant is Bridget O'Brien's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Dmand AI has Bridget O'Brien's licenses on file in 2 states: California and North Carolina.
Specialties and state licenses
- Physician assistant, CaliforniaPrimary
- Surgical physician assistant, North Carolina
Physician assistants near Bridget O'Brien
Counts of physician assistants 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
Bridget Ann O'Brien treated 47 Medicare patients in 2024, average age 76
CMS counts 47 Medicare patients who saw Bridget O'Brien in 2024. The largest group is 65 to 74, with 22 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 43% are also on Medicaid. Their average risk score is 2.83, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Bridget O'Brien's median patient age at 46, with 45% women.
Bridget O'Brien's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Bridget O'Brien's Medicare patients by sex, 2024
- Women2860%
- Men1940%
Chronic conditions among Bridget O'Brien's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis70%
- Heart failure60%
- Mood disorders60%
- Ischemic heart disease57%
- Depression53%
- Diabetes53%
Share of Medicare patients with each condition. A patient can have several.
Bridget 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 46
Patient panel by sex, all payers
- Women45%
- Men55%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Bridget Ann O'Brien wrote 43 Medicare Part D claims in 2024
In 2024, Bridget O'Brien wrote 43 Medicare Part D claims for 21 patients. 98% of them were for generic drugs.
Bridget O'Brien's Part D claims by kind of drug, 2024
- Generic42 claims98%
- Brand-name and other1 claims2%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
Bridget Ann O'Brien scored 93 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 93 out of 100 for Bridget O'Brien for performance year 2024, reported as part of a group. Bridget O'Brien accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Bridget O'Brien's MIPS scores, performance year 2024
- 93of 100Final score
- 77.8of 100Quality
- 98of 100Promoting Interoperability
- 40of 100Improvement Activities
- 71of 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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Bridget Ann O'Brien received $29 in industry payments in 2025
CMS Open Payments shows 1 general payment to Bridget O'Brien from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Incyte Corporation paid the most, $29.
Companies that paid Bridget O'Brien the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Bridget 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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| 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 (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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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 Bridget 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 Bridget Ann O'Brien's NPI number?
Bridget Ann O'Brien's NPI number is 1144453457. It was assigned on September 2, 2009, and it is active in the NPI Registry.
What does Bridget Ann O'Brien specialize in?
Bridget Ann O'Brien is a physician assistant in Oxnard, California. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Bridget Ann O'Brien practice?
Bridget O'Brien practices at 1600 N Rose Ave, Oxnard, CA 93030. Bridget O'Brien's primary practice is Dignity Health - St. John's Regional Medical Center in Oxnard, California, part of CommonSpirit Health. Dmand AI also links Bridget O'Brien to 1 hospital, 2 medical groups and 1 group practice or clinic.
What is Bridget Ann O'Brien's office phone number?
The practice phone on file for Bridget O'Brien is (805) 988-2500.
What is Bridget Ann O'Brien's medical license number?
Bridget O'Brien holds California license PA60390, one of the licenses on file in 2 states.
Which states has Bridget Ann O'Brien been licensed in?
Dmand AI has state licenses on file for Bridget O'Brien in California and North Carolina.
Which hospitals is Bridget Ann O'Brien affiliated with?
Bridget O'Brien practices at Dignity Health - St. John's Regional Medical Center in Oxnard, California. Bridget O'Brien is also affiliated with Cedars-Sinai Medical Center. Dmand AI links Bridget O'Brien to 1 more hospital.
What medical group is Bridget Ann O'Brien part of?
Bridget O'Brien is linked to Cedars-Sinai Medical Center. Dmand AI links Bridget O'Brien to 2 more medical groups.
Does Bridget Ann O'Brien accept Medicare?
Yes. CMS lists Bridget O'Brien as accepting Medicare assignment.
What is Bridget Ann O'Brien's MIPS score?
Bridget O'Brien's MIPS final score for performance year 2024 is 93 out of 100, reported as part of a group.
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How many Medicare patients does Bridget Ann O'Brien see?
CMS counts 47 Medicare patients who saw Bridget O'Brien in 2024, with an average age of 76.
Has Bridget Ann O'Brien received payments from drug or device companies?
CMS Open Payments shows $29 in general payments to Bridget O'Brien from 1 company from 2025 to 2025. The largest total came from Incyte Corporation.
How long has Bridget Ann O'Brien been practicing?
Bridget O'Brien graduated from medical school in 2009, 17 years ago.
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