David K Hahn, MD - Medicare Neurology in Greenwich, CT

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David K Hahn, MD is a medicare enrolled "Psychiatry & Neurology - Neurology" physician in Greenwich, Connecticut. He went to Warren Alpert Medical School Of Brown University and graduated in 2008 and has 17 years of diverse experience with area of expertise as Neurology. He is a member of the group practice Nuvance Health Medical Practice Ct Inc, Midstate Medical Center and his current practice location is 115 Mason St Ste 1, Greenwich, Connecticut. You can reach out to his office (for appointments etc.) via phone at (203) 276-4464.

David K Hahn is licensed to practice in Florida (license number ME134710) 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 1053625459.

Contact Information

David K Hahn, MD
115 Mason St Ste 1,
Greenwich, CT 06830-6630
(203) 276-4464
(203) 276-4468

Map and Direction




Physician's Profile

Full NameDavid K Hahn
GenderMale
SpecialityNeurology
Experience17 Years
Location115 Mason St Ste 1, Greenwich, 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:
  • David K Hahn attended and graduated from Warren Alpert Medical School Of Brown University in 2008
  NPI Data:
  • NPI Number: 1053625459
  • Provider Enumeration Date: 07/28/2010
  • Last Update Date: 10/28/2025
  Medicare PECOS Information:
  • PECOS PAC ID: 7911217724
  • Enrollment ID: I20151106001648

Medical Identifiers

Medical identifiers for David K Hahn such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1053625459NPI-NPPES
3118697MedicaidNH

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
2084N0400XPsychiatry & Neurology - Neurology 54629 (Connecticut)Secondary
2084N0400XPsychiatry & Neurology - Neurology 4301114366 (Michigan)Secondary
2084N0400XPsychiatry & Neurology - Neurology ME134710 (Florida)Primary
2084N0400XPsychiatry & Neurology - Neurology 19408 (New Hampshire)Secondary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Norwalk HospitalNorwalk, CTHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Nuvance Health Medical Practice Ct Inc4789597691694
Midstate Medical Center7416840699158

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. David K Hahn allows following entities to bill medicare on his behalf.
Entity NameNuvance Health Medical Practice Ct Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1407898117
PECOS PAC ID: 4789597691
Enrollment ID: O20031205000130
Entity NameThe Hospital Of Connecticut At New Britain And Bradley Memorial
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1063461481
PECOS PAC ID: 6507776564
Enrollment ID: O20040115000497
Entity NameNortheast Medical Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1043278351
PECOS PAC ID: 1254233836
Enrollment ID: O20040123000522
Entity NameThe Charlotte Hungerford Hospital
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1629075734
PECOS PAC ID: 4486557501
Enrollment ID: O20040128000183
Entity NameNorwalk Hospital Association
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1427041581
PECOS PAC ID: 3375436660
Enrollment ID: O20040202000988
Entity NameMidstate Medical Center
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1154425288
PECOS PAC ID: 7416840699
Enrollment ID: O20040203000244

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. David K Hahn 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
David K Hahn, MD
115 Mason St Ste 1,
Greenwich, CT 06830-6630

Ph: (718) 514-0224		David K Hahn, MD
115 Mason St Ste 1,
Greenwich, CT 06830-6630

Ph: (203) 276-4464

Reviews and Comments


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Dr. William Harrison Koch, MD
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Gene Ganz, M.D.
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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).

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