Adam Messenger, MD - Medicare Hospitalist in Cos Cob, CT

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Adam Messenger, MD is a medicare enrolled "Hospitalist" physician in Cos Cob, Connecticut. His current practice location is 31 River Rd, 200, Cos Cob, Connecticut. You can reach out to his office (for appointments etc.) via phone at (203) 661-9433.

Adam Messenger is licensed to practice in Connecticut (license number 045186) and he also participates in the medicare program. He does not accept medicare assignments directly but he may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. His NPI Number is 1447471784.

Contact Information

Adam Messenger, MD
31 River Rd, 200,
Cos Cob, CT 06807-2152
(203) 661-9433
Not Available

Map and Direction




Physician's Profile

Full NameAdam Messenger
GenderMale
SpecialityHospitalist
Location31 River Rd, Cos Cob, Connecticut
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1447471784
  • Provider Enumeration Date: 05/02/2007
  • Last Update Date: 11/05/2015
  Medicare PECOS Information:
  • PECOS PAC ID: 5294824512
  • Enrollment ID: I20071210000037

Medical Identifiers

Medical identifiers for Adam Messenger such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1447471784NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 045186 (Connecticut)Secondary
208M00000XHospitalist 045186 (Connecticut)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. Adam Messenger allows following entities to bill medicare on his behalf.
Entity NameGlenville Medical Associates P.c
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1982826574
PECOS PAC ID: 1456408400
Enrollment ID: O20090415000654

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. Adam Messenger 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
Adam Messenger, MD
121 Pilgrim Dr,
Greenwich, CT 06831-4941

Ph: (914) 433-0633		Adam Messenger, MD
31 River Rd, 200,
Cos Cob, CT 06807-2152

Ph: (203) 661-9433

Reviews and Comments


Hospitalist Doctors in Cos Cob, CT


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.