Dr William Allison Barret, MD, MS - Medicare Interventional Radiology in Nashville, TN

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Dr William Allison Barret, MD, MS is a medicare enrolled "Radiology - Vascular & Interventional Radiology" physician in Nashville, Tennessee. He went to Wake Forest University School Of Medicine and graduated in 2010 and has 16 years of diverse experience with area of expertise as Interventional Radiology. He is a member of the group practice Regents Of The Univ Of Ca, Vanderbilt University Medical Center, Vanderbilt Imaging Services Llc, Williamson Imaging Llc, One Hundred Oaks Imaging Llc and his current practice location is 3601 The Vanderbilt Clinic, Nashville, Tennessee. You can reach out to his office (for appointments etc.) via phone at (615) 322-3000.

Dr William Allison Barret is licensed to practice in Tennessee (license number 54144) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1891012696.

Contact Information

Dr William Allison Barret, MD, MS
3601 The Vanderbilt Clinic,
Nashville, TN 37232-2637
(615) 322-3000
Not Available

Map and Direction




Physician's Profile

Full NameDr William Allison Barret
GenderMale
SpecialityInterventional Radiology
Experience16 Years
Location3601 The Vanderbilt Clinic, Nashville, Tennessee
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Dr William Allison Barret attended and graduated from Wake Forest University School Of Medicine in 2010
  NPI Data:
  • NPI Number: 1891012696
  • Provider Enumeration Date: 05/03/2010
  • Last Update Date: 05/08/2026
  Medicare PECOS Information:
  • PECOS PAC ID: 2668618315
  • Enrollment ID: I20200203000742

Medical Identifiers

Medical identifiers for Dr William Allison Barret such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1891012696NPI-NPPES
Q022578MedicaidTN

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
2085R0204XRadiology - Vascular & Interventional Radiology 4301113903 (Michigan)Secondary
2085R0204XRadiology - Vascular & Interventional Radiology 54144 (Tennessee)Primary
2085R0202XRadiology - Diagnostic Radiology 54144 (Tennessee)Secondary
2085R0202XRadiology - Diagnostic Radiology 31315 (Alabama)Secondary
2085R0204XRadiology - Vascular & Interventional Radiology 49096 (Kentucky)Secondary
2085R0204XRadiology - Vascular & Interventional Radiology 64788 (Arizona)Secondary
2085R0204XRadiology - Vascular & Interventional Radiology 31315 (Alabama)Secondary
2085R0204XRadiology - Vascular & Interventional Radiology A153029 (California)Secondary

Medical Facilities Affiliation

Facility NameLocationFacility Type
University Of California Davis Medical CenterSacramento, CAHospital
Vanderbilt Wilson County HospitalLebanon, TNHospital
Tennova Healthcare-hartonTullahoma, TNHospital
Vanderbilt University Medical CenterNashville, TNHospital
Tennova Healthcare-shelbyvilleShelbyville, TNHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Regents Of The Univ Of Ca33754566191602
Vanderbilt University Medical Center50920234163447
Vanderbilt Imaging Services Llc2163417882122
Williamson Imaging Llc3375447139111
One Hundred Oaks Imaging Llc1355490756113

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. Dr William Allison Barret allows following entities to bill medicare on his behalf.
Entity NameRegents Of The University Of California
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1558463927
PECOS PAC ID: 3577476761
Enrollment ID: O20040107000584
Entity NameCounty Of San Joaquin
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1801830583
PECOS PAC ID: 6002703436
Enrollment ID: O20040301001287
Entity NameSan Joaquin Faculty Medical Group
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1225063761
PECOS PAC ID: 4082631395
Enrollment ID: O20051026000742
Entity NameRegents Of The University Of California Ucsd Department Of Radiology
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1225213655
PECOS PAC ID: 8224108741
Enrollment ID: O20080610000132
Entity NameCity Of Hope Medical Foundation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1871886366
PECOS PAC ID: 3779751656
Enrollment ID: O20110720000244

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. Dr William Allison Barret 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
Dr William Allison Barret, MD, MS
3841 Green Hills Village Dr Ste 200,
Nashville, TN 37215-2691

Ph: () -		Dr William Allison Barret, MD, MS
3601 The Vanderbilt Clinic,
Nashville, TN 37232-2637

Ph: (615) 322-3000

Reviews and Comments


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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).

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