Mary J Keegan, APN - Medicare Nurse Practitioner in Saint Louis, MO

Mary J Keegan, APN is a medicare enrolled "Nurse Practitioner - Adult Health" in Saint Louis, Missouri. She graduated from nursing school in 1986 and has 38 years of diverse experience with area of expertise as Nurse Practitioner. She is a member of the group practice Heart And Vascular Associates Llc and her current practice location is 3660 Vista Ave, Saint Louis, Missouri. You can reach out to her office (for appointments etc.) via phone at (314) 977-6100.

Mary J Keegan is licensed to practice in Missouri (license number 082605) 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 1336157213.

Contact Information

Mary J Keegan, APN
3660 Vista Ave,
Saint Louis, MO 63110-2540
(314) 977-6100
(314) 977-6137

Map and Direction




Provider's Profile

Full NameMary J Keegan
GenderFemale
SpecialityNurse Practitioner
Experience38 Years
Location3660 Vista Ave, Saint Louis, Missouri
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:
  • Mary J Keegan graduated from nursing school in 1986
  NPI Data:
  • NPI Number: 1336157213
  • Provider Enumeration Date: 08/04/2006
  • Last Update Date: 09/22/2023
  Medicare PECOS Information:
  • PECOS PAC ID: 0143278440
  • Enrollment ID: I20050104000165

Medical Identifiers

Medical identifiers for Mary J Keegan such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1336157213NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
163W00000XRegistered Nurse 082605 (Missouri)Secondary
163WP2201XRegistered Nurse - Ambulatory Care 082605 (Missouri)Secondary
363L00000XNurse Practitioner 082605 (Missouri)Secondary
363LA2100XNurse Practitioner - Acute Care 082605 (Missouri)Secondary
363LA2200XNurse Practitioner - Adult Health 082605 (Missouri)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Washington County Memorial HospitalPotosi, MOHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Heart And Vascular Associates Llc70122089524

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. Mary J Keegan allows following entities to bill medicare on her behalf.
Entity NameHeart And Vascular Associates Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1336595198
PECOS PAC ID: 7012208952
Enrollment ID: O20160623000558

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. Mary J Keegan 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
Mary J Keegan, APN
3691 Rutger St, Provider Enrollment,
Saint Louis, MO 63110-2515

Ph: (314) 977-4440
Mary J Keegan, APN
3660 Vista Ave,
Saint Louis, MO 63110-2540

Ph: (314) 977-6100

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).

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.