Dr Mary Margaret Hennessy, MD - Medicare Psychiatry & Neurology in Marshfield, WI

  1. Home
  2. Psychiatry & Neurology
  3. WI
  4. Marshfield
Dr Mary Margaret Hennessy, MD is a medicare enrolled "Psychiatry & Neurology - Psychiatry" physician in Marshfield, Wisconsin. Her current practice location is 1000 N Oak Ave, Marshfield, Wisconsin. You can reach out to her office (for appointments etc.) via phone at (715) 387-5511.

Dr Mary Margaret Hennessy is licensed to practice in Wisconsin (license number 56027) 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 1104980119.

Contact Information

Dr Mary Margaret Hennessy, MD
1000 N Oak Ave,
Marshfield, WI 54449-5703
(715) 387-5511
Not Available

Map and Direction




Physician's Profile

Full NameDr Mary Margaret Hennessy
GenderFemale
SpecialityPsychiatry & Neurology - Psychiatry
Location1000 N Oak Ave, Marshfield, Wisconsin
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1104980119
  • Provider Enumeration Date: 12/21/2006
  • Last Update Date: 09/16/2011
  Medicare PECOS Information:
  • PECOS PAC ID: 7911048160
  • Enrollment ID: I20110921000056

Medical Identifiers

Medical identifiers for Dr Mary Margaret Hennessy such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1104980119NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
2084P0800XPsychiatry & Neurology - Psychiatry 33238 (Minnesota)Secondary
2084P0804XPsychiatry & Neurology - Child & Adolescent Psychiatry 33238 (Minnesota)Secondary
2084P0800XPsychiatry & Neurology - Psychiatry 56027 (Wisconsin)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. Dr Mary Margaret Hennessy allows following entities to bill medicare on her behalf.
Entity NameMarshfield Clinic Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1952347981
PECOS PAC ID: 2264345206
Enrollment ID: O20031106000590
Entity NameMchs Hospitals Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1093221434
PECOS PAC ID: 5698071173
Enrollment ID: O20180208000096

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 Mary Margaret Hennessy 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 Mary Margaret Hennessy, MD
1000 N Oak Ave,
Marshfield, WI 54449-5703

Ph: (715) 387-5511		Dr Mary Margaret Hennessy, MD
1000 N Oak Ave,
Marshfield, WI 54449-5703

Ph: (715) 387-5511

Reviews and Comments


Psychiatry & Neurology Doctors in Marshfield, WI

Dr. Sonja Blum, MD, PHD
Psychiatry & Neurology
Medicare: Accepting Medicare Assignments
Practice Location: 1000 N Oak Ave, Marshfield, WI 54449
Phone: 715-387-5511    
Daniel Alan Jurczyk, MD
Psychiatry & Neurology
Medicare: Medicare Enrolled
Practice Location: 1000 N Oak Ave, Marshfield, WI 54449
Phone: 715-387-5511    
Soniya Sweeti Mascarenhas, DNP
Psychiatry & Neurology
Medicare: Accepting Medicare Assignments
Practice Location: 1000 N Oak Ave, Marshfield, WI 54449
Phone: 715-387-5744    
Percy N Karanjia, MD
Psychiatry & Neurology
Medicare: Not Enrolled in Medicare
Practice Location: 1000 N Oak Ave, Marshfield, WI 54449
Phone: 715-387-5351    
Justin W. Schoen, M.D.
Psychiatry & Neurology
Medicare: Accepting Medicare Assignments
Practice Location: 1000 N Oak Ave, Marshfield, WI 54449
Phone: 715-387-5511    
John Waters, MD
Psychiatry & Neurology
Medicare: Accepting Medicare Assignments
Practice Location: 1000 N Oak Ave, Marshfield, WI 54449
Phone: 715-387-5751    

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.