Alexandra L Messerli, MD - Medicare Internal Medicine in Williston, VT

Alexandra L Messerli, MD is a medicare enrolled "Internal Medicine - Geriatric Medicine" physician in Williston, Vermont. She went to University Of Vermont College Of Medicine and graduated in 2013 and has 11 years of diverse experience with area of expertise as Internal Medicine. She is a member of the group practice University Of Vermont Medical Center Inc and her current practice location is 353 Blair Park Rd, Williston, Vermont. You can reach out to her office (for appointments etc.) via phone at (802) 847-1470.

Alexandra L Messerli is licensed to practice in Vermont (license number 042.0013838) and she also participates in the medicare program. She accepts medicare assignments (which means she accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and her NPI Number is 1992142939.

Contact Information

Alexandra L Messerli, MD
353 Blair Park Rd,
Williston, VT 05495-7530
(802) 847-1470
(802) 847-7135

Map and Direction




Physician's Profile

Full NameAlexandra L Messerli
GenderFemale
SpecialityInternal Medicine
Experience11 Years
Location353 Blair Park Rd, Williston, Vermont
Accepts Medicare AssignmentsYes. She accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Alexandra L Messerli attended and graduated from University Of Vermont College Of Medicine in 2013
  NPI Data:
  • NPI Number: 1992142939
  • Provider Enumeration Date: 05/31/2013
  • Last Update Date: 07/21/2022
  Medicare PECOS Information:
  • PECOS PAC ID: 8527208735
  • Enrollment ID: I20180129000515

Medical Identifiers

Medical identifiers for Alexandra L Messerli such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1992142939NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RG0300XInternal Medicine - Geriatric Medicine 042.0013838 (Vermont)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Bayada Home Health CareWilliston, VTHome health agency
Vna Of Chittenden & Grand Isle CountiesColchester, VTHospice
Univ. Of Vermont - Fletcher Allen Health CareBurlington, VTHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
University Of Vermont Medical Center Inc3779491071970

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. Alexandra L Messerli allows following entities to bill medicare on her behalf.
Entity NameUniversity Of Vermont Medical Center Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1659309615
PECOS PAC ID: 3779491071
Enrollment ID: O20040406001047

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. Alexandra L Messerli 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
Alexandra L Messerli, MD
353 Blair Park Rd,
Williston, VT 05495-7530

Ph: (802) 847-1470
Alexandra L Messerli, MD
353 Blair Park Rd,
Williston, VT 05495-7530

Ph: (802) 847-1470

Reviews and Comments


Internal Medicine Doctors in Williston, VT

Dr. Lucy Miller, MD
Geriatric Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 353 Blair Park Rd, Williston, VT 05495
Phone: 802-847-1470    
Dr. Dennis Armand Plante, MD
Geriatric Medicine
Medicare: Medicare Enrolled
Practice Location: 353 Blair Park Rd, Williston, VT 05495
Phone: 802-847-1470    Fax: 802-847-7135
Dr. Marvin Klikunas, MD
Geriatric Medicine
Medicare: Medicare Enrolled
Practice Location: 353 Blair Park Rd, Williston, VT 05495
Phone: 802-847-1470    Fax: 802-847-7135
Owen David Maguire, MD
Geriatric Medicine
Medicare: Medicare Enrolled
Practice Location: 353 Blair Park Rd, Williston, VT 05495
Phone: 802-847-1470    
Jonathan Benjamin Wilfong, M.D.
Geriatric Medicine
Medicare: Medicare Enrolled
Practice Location: 353 Blair Park Rd, Williston, VT 05495
Phone: 802-847-1470    Fax: 802-847-7135
Anne E Brena, MD
Geriatric Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 353 Blair Park Rd, Williston, VT 05495
Phone: 802-847-1470    

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.