CASSANDRA L O'BRIEN APRN
NPI 1821597717
Nurse Practitioner in Winter Park, FL

Q: What is Cassandra O'brien's NPI number?

The NPI number for Cassandra O'brien is 1821597717. It was assigned to this individual provider in the NPPES registry on February 6, 2018.

Q: What is Cassandra O'brien's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

Q: When was this NPI record last updated?

The NPPES record for Cassandra O'brien was last updated on January 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since February 06, 2018PECOS EnrolledAccepts Medicare Assignment

1605 W FAIRBANKS AVE, WINTER PARK, FL 32789(407) 845-8356 Get Directions Write a Review

NPPES record last updated: January 6, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

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About Cassandra L O'brien Aprn NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

CASSANDRA L O'BRIEN APRN (NPI 1821597717) is an individual nurse practitioner in Winter Park, Florida, licensed in Florida (APRN9363285) and active in the NPI registry since February 2018. She is enrolled in Medicare PECOS, is affiliated with Adventhealth Orlando, and is a graduate of Other (2017).

NPPES Registry Identity

NPI1821597717

Entity TypeIndividualFemale

Primary Taxonomy363L00000X

Provider Legal NameCASSANDRA L O'BRIENCredential: APRN

Location Address1605 W FAIRBANKS AVEWinter Park, FL 32789-4603

Mailing Address1605 W Fairbanks AveWinter Park, FL 32789-4603 · (407) 845-8356

Phone(407) 845-8356

Sole ProprietorNo

Medical School CMSOtherGraduated 2017

Enumeration DateFebruary 6, 2018

Last NPPES UpdateJanuary 6, 2026

NPPES CertifiedJanuary 6, 2026

✔ NPI 1821597717 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363L00000X

License✔ Licensed in FL · APRN9363285

Definition

(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.

Also ListedNurse Practitioner · FamilyTaxonomy 363LF0000X · License APRN9363285 (FL)

1605 W FAIRBANKS AVE, Winter Park, FL 32789

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Other Identifiers 1

OtherARNP9363285FL · Medical License

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Superior HealthPlan, Ambetter Health, Ambetter of Alabama.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Cassandra L O'brien Aprn is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID6507129038

PECOS Enrollment IDI20180417000111

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Cassandra O'brien reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Florida Hospital Medical Group Inc

3.2 mi

Family Medicine

1115 E RIDGEWOOD ST
Orlando, FL 32803

Reassigned Medicare billing, Florida enrollment
3,005 clinicians in this Medicare group

NPI 1225034234 (407) 841-1100

Orlando Cardiac And Vascular Specialists LLC

4.6 mi

Interventional Cardiology

251 MAITLAND AVE, SUITE 116
Altamonte Springs, FL 32701

Reassigned Medicare billing, Florida enrollment
11 clinicians in this Medicare group

NPI 1194116848 (407) 915-5643

Central Florida Inpatient Medicine LLC

9.9 mi

Internal Medicine

525 TECHNOLOGY PARK STE 109
Lake Mary, FL 32746

Reassigned Medicare billing, Florida enrollment
329 clinicians in this Medicare group

NPI 1649228859 (407) 647-2346

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

19 services19 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Adventhealth Orlando

Acute Care Hospitals · Orlando, FL

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number100007

Location601 E Rollins StOrlando, FL 32803 · Orange County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 32789 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$87.62 typical visit price

range $56.00 – $171.84

Typical copayment $21.90 (range $14.00 – $42.96)

Most-billed visit code 99203

Established Patient

$99.16 typical visit price

range $17.57 – $139.16

Typical copayment $24.79 (range $4.39 – $34.79)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Automatic external defibrillator, with integrated electrocardiogram analysis, garment type K0606

DME-Other DME · category DE013N

1 supplier14 claims14 services$2,344.60 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MRS. SHAMIM A HASAN PA-C

Physician Assistant