Cassandra L. O'Brien, APRN
- Medicare services, 2024
- 19
- Medicare patients, 2024
- 20
- Part D claims, 2024
- 451
- MIPS score, 2024
- 97
- Hospital affiliations
- 1
- Practice address
- 601 E Rollins St, Orlando, FL 32803
- Practice phone
- Call (407) 303-1976
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Cassandra O'Brien's professional email, personal email and mobile number
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Cassandra L. O'Brien is a nurse practitioner in Orlando, Florida
Cassandra O'Brien practices at AdventHealth Orlando in Orlando, Florida, part of AdventHealth.
Cassandra O'Brien's NPI, 1821597717, was assigned on February 6, 2018. Cassandra O'Brien holds Florida license ARNP9363285.
- NPI
- 1821597717NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6507129038
- NPI enumeration date
- February 6, 2018
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (407) 303-1976
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 35
- Medical school graduation
- 2017
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Cassandra L. O'Brien practices at AdventHealth Orlando in Orlando, Florida
Cassandra O'Brien's primary practice is AdventHealth Orlando, at 601 E Rollins St, Orlando, FL 32803 in Orange County. The practice phone is (407) 303-1976.
- AdventHealth Orlando601 E Rollins St, Orlando, FL 32803 · Orange CountyPhone(407) 303-1976
Source: Dmand AI Affiliation Data
Cassandra L. O'Brien is affiliated with 3 sites of care and 3 medical groups
Cassandra O'Brien's primary practice is AdventHealth Orlando in Orlando, Florida, part of AdventHealth. The medical group on file is AdventHealth Medical Group. Dmand AI also links Cassandra O'Brien to 2 more group practices and clinics and 2 medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Cassandra L. O'Brien's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Cassandra O'Brien practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| AdventHealth Orlando | Available with a free account |
| +2 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Cassandra L. O'Brien is one of 5,914 nurse practitioners in Florida
Nurse practitioner is Cassandra O'Brien's primary specialty in the NPI Registry, under taxonomy code 363L00000X. Cassandra O'Brien is licensed in Florida.
Specialties and state licenses
- Nurse practitioner, FloridaPrimary
Nurse practitioners near Cassandra O'Brien
Counts of nurse practitioners 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
Cassandra L. O'Brien billed Medicare for 19 services in 2024
CMS data shows 19 Medicare services from Cassandra O'Brien across 1 procedure code in 2024, all of them office visits, for 20 Medicare patients. Medicare paid $1,521 for them. Every service was in an office.
Cassandra O'Brien compared with the Florida median for nurse practitioners, 2024
- Cassandra O'Brien
- Florida median
- Medicare services
- 19vs 36695% below
- Medicare patients
- 20vs 12584% below
- Part D claims
- 292vs 41029% below
Medians across 3,670 nurse practitioners in Florida with Dmand AI profiles that report each measure.
Cassandra 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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Cassandra L. O'Brien treated 20 Medicare patients in 2024, average age 75
CMS counts 20 Medicare patients who saw Cassandra O'Brien in 2024. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.64, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Cassandra O'Brien's median patient age at 70, with 44% women.
Chronic conditions among Cassandra O'Brien's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease70%
Share of Medicare patients with each condition. A patient can have several.
Cassandra 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 70
Patient panel by sex, all payers
- Women44%
- Men56%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Cassandra L. O'Brien wrote 451 Medicare Part D claims in 2024
In 2024, Cassandra O'Brien wrote 451 Medicare Part D claims for 149 patients. 78% of them were for generic drugs. CMS names the drug for 292 of them, across 16 drugs with 11 or more claims each, at $69,554 in total drug cost.
Cassandra O'Brien's Part D claims by kind of drug, 2024
- Generic352 claims78%
- Brand-name99 claims22%
Cassandra 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.
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
Cassandra L. O'Brien scored 97 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 97 out of 100 for Cassandra O'Brien for performance year 2024, reported as part of a group. Cassandra O'Brien accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Cassandra O'Brien's MIPS scores, performance year 2024
- 97of 100Final score
- 98.1of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 76of 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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Cassandra L. O'Brien received $1,484 in industry payments from 2024 to 2025
CMS Open Payments shows 43 general payments to Cassandra O'Brien from 11 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. Kestra Medical Technology Services, Inc. paid the most, $445.
General payments to Cassandra O'Brien by program year, 2024 to 2025
Companies that paid Cassandra O'Brien the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Cassandra L. 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 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) |
| 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 Cassandra L. 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 Cassandra L. O'Brien's NPI number?
Cassandra L. O'Brien's NPI number is 1821597717. It was assigned on February 6, 2018, and it is active in the NPI Registry.
What does Cassandra L. O'Brien specialize in?
Cassandra L. O'Brien is a nurse practitioner in Orlando, Florida. The primary specialty in the NPI Registry is Nurse Practitioner (taxonomy code 363L00000X).
Where does Cassandra L. O'Brien practice?
Cassandra O'Brien practices at 601 E Rollins St, Orlando, FL 32803. Cassandra O'Brien's primary practice is AdventHealth Orlando in Orlando, Florida, part of AdventHealth. Dmand AI also links Cassandra O'Brien to 2 group practices and clinics and 2 medical groups.
What is Cassandra L. O'Brien's office phone number?
The practice phone on file for Cassandra O'Brien is (407) 303-1976.
What is Cassandra L. O'Brien's medical license number?
Cassandra O'Brien holds Florida license ARNP9363285.
Which hospitals is Cassandra L. O'Brien affiliated with?
Cassandra O'Brien practices at AdventHealth Orlando in Orlando, Florida.
What medical group is Cassandra L. O'Brien part of?
Cassandra O'Brien is linked to AdventHealth Medical Group. Dmand AI links Cassandra O'Brien to 2 more medical groups.
Does Cassandra L. O'Brien accept Medicare?
Yes. CMS data shows Cassandra O'Brien billed Medicare for 19 services in 2024, and Cassandra O'Brien accepts Medicare assignment.
What is Cassandra L. O'Brien's MIPS score?
Cassandra O'Brien's MIPS final score for performance year 2024 is 97 out of 100, reported as part of a group.
How many Medicare patients does Cassandra L. O'Brien see?
CMS counts 20 Medicare patients who saw Cassandra O'Brien in 2024, with an average age of 75.
Show 4 more questionsShow fewer questions
What services does Cassandra L. O'Brien bill to Medicare?
In 2024, Cassandra O'Brien's most billed Medicare services were office visit, established patient (99214).
What drugs does Cassandra L. O'Brien prescribe most?
In 2024 Medicare Part D data, Cassandra O'Brien's most prescribed drugs by claims were Eliquis, Metoprolol Succinate and Losartan Potassium.
Has Cassandra L. O'Brien received payments from drug or device companies?
CMS Open Payments shows $1,484 in general payments to Cassandra O'Brien from 11 companies from 2024 to 2025. The largest total came from Kestra Medical Technology Services, Inc.
How long has Cassandra L. O'Brien been practicing?
Cassandra O'Brien graduated from medical school in 2017, 9 years ago.
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