William James O'brien, PA - Medicare Physician Assistant in Livingston, NJ

William James O'brien, PA is a medicare enrolled "Physician Assistant" in Livingston, New Jersey. His current practice location is 94 Old Short Hills Rd, Livingston, New Jersey. You can reach out to his office (for appointments etc.) via phone at (973) 322-5000.

William James O'brien is licensed to practice in New Jersey (license number 25MP00740600) 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 1649993841.

Contact Information

William James O'brien, PA
94 Old Short Hills Rd,
Livingston, NJ 07039-5672
(973) 322-5000
Not Available

Map and Direction




Provider's Profile

Full NameWilliam James O'brien
GenderMale
SpecialityPhysician Assistant
Location94 Old Short Hills Rd, Livingston, New Jersey
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1649993841
  • Provider Enumeration Date: 09/22/2022
  • Last Update Date: 06/27/2024
  Medicare PECOS Information:
  • PECOS PAC ID: 4082082185
  • Enrollment ID: I20221121003206

Medical Identifiers

Medical identifiers for William James O'brien such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1649993841NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
363A00000XPhysician Assistant (* (Not Available))Secondary
363A00000XPhysician Assistant 25MP00740600 (New Jersey)Primary

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. William James 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
William James O'brien, PA
102 E Bay View Dr,
Annapolis, MD 21403-4102

Ph: (240) 778-8873
William James O'brien, PA
94 Old Short Hills Rd,
Livingston, NJ 07039-5672

Ph: (973) 322-5000

Reviews and Comments


Physician Assistant Nurses in Livingston, NJ

Eugenia Glushanok, PA
Physician Assistant
Medicare: Accepting Medicare Assignments
Practice Location: 94 Old Short Hills Road, Livingston, NJ 07039
Phone: 201-322-5000    
Nikola Fistrovic, PA
Physician Assistant
Medicare: Medicare Enrolled
Practice Location: 94 Old Short Hills Rd, Livingston, NJ 07039
Phone: 973-322-5000    
Toni Ann Santillo, PA-C
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Medicare: Medicare Enrolled
Practice Location: 75 E Northfield Rd, Livingston, NJ 07039
Phone: 973-436-1330    Fax: 973-486-4210
Dana Marie Esposito, PA-C
Physician Assistant
Medicare: Medicare Enrolled
Practice Location: 94 Old Short Hills Rd, Livingston, NJ 07039
Phone: 973-322-5195    
Patricia Hoelzler, PA
Physician Assistant
Medicare: Medicare Enrolled
Practice Location: 94 Old Short Hills Rd, St. Barnabas Medical Center, Livingston, NJ 07039
Phone: 973-322-5000    
Hiral Chandni, P.A.
Physician Assistant
Medicare: Accepting Medicare Assignments
Practice Location: 94 Old Short Hills Rd, St. Barnabas Medical Center, Livingston, NJ 07039
Phone: 973-322-5000    
Dr. Kasey Lynn Disomma, DMSC, PA-C
Physician Assistant
Medicare: Accepting Medicare Assignments
Practice Location: 94 Old Short Hills Rd, Livingston, NJ 07039
Phone: 973-570-8700    

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.