Tracy A Williamson, - Medicare Psychologist in Irvine, CA

Tracy A Williamson, is a medicare enrolled "Psychologist - Clinical" provider in Irvine, California. Her current practice location is 300 Spectrum Dr., Irvine, California. You can reach out to her office (for appointments etc.) via phone at (949) 201-9147.

Tracy A Williamson is licensed to practice in California (license number PSY18060) and she also participates in the medicare program. She does not accept medicare assignments directly but she may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. Her NPI Number is 1285834424.

Contact Information

Tracy A Williamson,
300 Spectrum Dr.,
Irvine, CA 92618
(949) 201-9147
Not Available

Map and Direction




Healthcare Provider's Profile

Full NameTracy A Williamson
GenderFemale
SpecialityPsychologist - Clinical
Location300 Spectrum Dr., Irvine, California
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1285834424
  • Provider Enumeration Date: 07/24/2007
  • Last Update Date: 03/17/2018
  Medicare PECOS Information:
  • PECOS PAC ID: 5890033823
  • Enrollment ID: I20190215002224

Medical Identifiers

Medical identifiers for Tracy A Williamson such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1285834424NPI-NPPES
1285834424OtherCANPI

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
103TC0700XPsychologist - Clinical PSY18060 (California)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. Tracy A Williamson allows following entities to bill medicare on her behalf.
Entity NameHarbor Psychiatry & Mental Health Professional Corporation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1780050054
PECOS PAC ID: 8729394572
Enrollment ID: O20150825004062

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. Tracy A Williamson 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
Tracy A Williamson,
5901 Victory Ct,
Fairfield, CA 94533-9747

Ph: (949) 201-9147
Tracy A Williamson,
300 Spectrum Dr.,
Irvine, CA 92618

Ph: (949) 201-9147

Reviews and Comments


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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.

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