Dr John Joseph Hennessey, MD - Medicare Internal Medicine in Gales Ferry, CT

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Dr John Joseph Hennessey, MD is a medicare enrolled "Internal Medicine" physician in Gales Ferry, Connecticut. He went to Tufts University School Of Medicine and graduated in 1996 and has 28 years of diverse experience with area of expertise as Internal Medicine. He is a member of the group practice Gales Ferry Medical Group Llc and his current practice location is 1527 Route 12, Suite 1, Gales Ferry, Connecticut. You can reach out to his office (for appointments etc.) via phone at (860) 464-7253.

Dr John Joseph Hennessey is licensed to practice in Connecticut (license number 037592) 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 1215916564.

Contact Information

Dr John Joseph Hennessey, MD
1527 Route 12, Suite 1,
Gales Ferry, CT 06335-1800
(860) 464-7253
(860) 464-7404

Map and Direction




Physician's Profile

Full NameDr John Joseph Hennessey
GenderMale
SpecialityInternal Medicine
Experience28 Years
Location1527 Route 12, Gales Ferry, Connecticut
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 John Joseph Hennessey attended and graduated from Tufts University School Of Medicine in 1996
  NPI Data:
  • NPI Number: 1215916564
  • Provider Enumeration Date: 01/14/2006
  • Last Update Date: 11/30/2012
  Medicare PECOS Information:
  • PECOS PAC ID: 0143362525
  • Enrollment ID: I20100902000771

Medical Identifiers

Medical identifiers for Dr John Joseph Hennessey such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1215916564NPI-NPPES
001375923MedicaidCT

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 037592 (Connecticut)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Masonicare Home Health And Hospice IncWallingford, CTHospice
Hartford Healthcare At HomeBloomfield, CTHospice
Lawrence & Memorial HospitalNew london, CTHospital
Westerly HospitalWesterly, RIHospital
Avalon Health Care Center At StoneridgeMystic, CTNursing home
Groton Regency CenterGroton, CTNursing home

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Gales Ferry Medical Group Llc39716453594

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 John Joseph Hennessey allows following entities to bill medicare on his behalf.
Entity NameGales Ferry Medical Group Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1194859058
PECOS PAC ID: 3971645359
Enrollment ID: O20100122000631

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 John Joseph Hennessey 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 John Joseph Hennessey, MD
Po Box 355,
Gales Ferry, CT 06335-0355

Ph: (860) 464-7253		Dr John Joseph Hennessey, MD
1527 Route 12, Suite 1,
Gales Ferry, CT 06335-1800

Ph: (860) 464-7253

Reviews and Comments


Internal Medicine Doctors in Gales Ferry, CT

Dr. Mary Sheila Murphy-fiengo, D.O.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1527 Route 12, Suite 1, Gales Ferry, CT 06335
Phone: 860-464-7274    Fax: 860-464-7404
Kathleen Mary Oconnor, A.P.R.N.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1527 Route 12, Gales Ferry, CT 06335
Phone: 860-464-7253    Fax: 860-464-7404
Dr. Sanford Alan Greenhouse, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1527 Route 12, Gales Ferry, CT 06335
Phone: 860-464-7253    Fax: 860-464-7404

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.