Casey M O'brien, PA-C - Medicare Physician Assistant in Williston, VT

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Casey M O'brien, PA-C is a medicare enrolled "Physician Assistant" in Williston, Vermont. His current practice location is 426 Industrial Ave Ste 130, Williston, Vermont. You can reach out to his office (for appointments etc.) via phone at (802) 878-1175.

Casey M O'brien is licensed to practice in Vermont (license number 055.0031747) and he also participates in the medicare program. He does not accept medicare assignments directly but he may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. His NPI Number is 1073133484.

Contact Information

Casey M O'brien, PA-C
426 Industrial Ave Ste 130,
Williston, VT 05495-4449
(802) 878-1175
(802) 652-5355

Map and Direction




Provider's Profile

Full NameCasey M O'brien
GenderMale
SpecialityPhysician Assistant
Location426 Industrial Ave Ste 130, Williston, Vermont
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1073133484
  • Provider Enumeration Date: 04/26/2020
  • Last Update Date: 01/13/2026
  Medicare PECOS Information:
  • PECOS PAC ID: 7214328921
  • Enrollment ID: I20240708000606

Medical Identifiers

Medical identifiers for Casey M O'brien such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1073133484NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
363A00000XPhysician Assistant 055.0031747 (Vermont)Primary

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Casey M O'brien allows following entities to bill medicare on his behalf.
Entity NameEvergreen Family Health Partners
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1588790562
PECOS PAC ID: 1153402888
Enrollment ID: O20080118000342

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Casey M O'brien is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Casey M O'brien, PA-C
426 Industrial Ave Ste 130,
Williston, VT 05495-4449

Ph: (802) 878-1175		Casey M O'brien, PA-C
426 Industrial Ave Ste 130,
Williston, VT 05495-4449

Ph: (802) 878-1175

Reviews and Comments


Physician Assistant Nurses in Williston, VT

Emma Waters-dukes, PA-C
Physician Assistant
Medicare: May Accept Medicare Assignments
Practice Location: 426 Industrial Ave Ste 130, Williston, VT 05495
Phone: 802-299-1180    
Johanna Hauser, PA
Physician Assistant
Medicare: Not Enrolled in Medicare
Practice Location: 75 Talcott Rd, Suite 10, Williston, VT 05495
Phone: 802-879-4800    
Zachary Nollet, PA-C
Physician Assistant
Medicare: Accepting Medicare Assignments
Practice Location: 586 Oak Hill Rd, Williston, VT 05495
Phone: 802-878-8131    
Nathan Albert Wigton Bell, PA-C
Physician Assistant
Medicare: Accepting Medicare Assignments
Practice Location: 426 Industrial Ave Ste 130, Williston, VT 05495
Phone: 802-878-1008    
Elizabeth Kathryn Loscalzo, PA-C
Physician Assistant
Medicare: Medicare Enrolled
Practice Location: 28 Park Ave, Williston, VT 05495
Phone: 802-878-1008    Fax: 802-872-2679
Jamie Kazar, PA
Physician Assistant
Medicare: Accepting Medicare Assignments
Practice Location: 62 Merchants Row, Williston, VT 05495
Phone: 802-307-1200    Fax: 802-307-1201
Molly Backup, PA
Physician Assistant
Medicare: Not Enrolled in Medicare
Practice Location: 28 Park Ave, Williston, VT 05495
Phone: 802-878-1008    Fax: 802-872-2679

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.