Dr Kathryn Leigh Mazza, DO - Medicare Internal Medicine in Guilford, CT

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Dr Kathryn Leigh Mazza, DO is a medicare enrolled "Internal Medicine" physician in Guilford, Connecticut. Her current practice location is 1591 Boston Post Rd Ste 100, Guilford, Connecticut. You can reach out to her office (for appointments etc.) via phone at (203) 453-9911.

Dr Kathryn Leigh Mazza is licensed to practice in Connecticut (license number 079272) 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 1497196471.

Contact Information

Dr Kathryn Leigh Mazza, DO
1591 Boston Post Rd Ste 100,
Guilford, CT 06437-4335
(203) 453-9911
(203) 458-1905

Map and Direction




Physician's Profile

Full NameDr Kathryn Leigh Mazza
GenderFemale
SpecialityInternal Medicine
Location1591 Boston Post Rd Ste 100, Guilford, Connecticut
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1497196471
  • Provider Enumeration Date: 07/08/2013
  • Last Update Date: 08/19/2025
  Medicare PECOS Information:
  • PECOS PAC ID: 3375817810
  • Enrollment ID: I20170921001275

Medical Identifiers

Medical identifiers for Dr Kathryn Leigh Mazza such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1497196471NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207Q00000XFamily Medicine 289426 (New York)Secondary
207R00000XInternal Medicine 079272 (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. Dr Kathryn Leigh Mazza allows following entities to bill medicare on her behalf.
Entity NameSun River Health Inc.
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1568526838
PECOS PAC ID: 6608783568
Enrollment ID: O20040714000375
Entity NameWestchester Medical Center Advanced Physician Services Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1912131392
PECOS PAC ID: 3173660776
Enrollment ID: O20091031000042

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 Kathryn Leigh Mazza 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 Kathryn Leigh Mazza, DO
55 Water St, Fl 12,
New York, NY 10041-0004

Ph: (646) 680-2888		Dr Kathryn Leigh Mazza, DO
1591 Boston Post Rd Ste 100,
Guilford, CT 06437-4335

Ph: (203) 453-9911

Reviews and Comments


Internal Medicine Doctors in Guilford, CT

Dr. Jeffrey Carlton Roeser, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1591 Boston Post Rd Ste 100, Guilford, CT 06437
Phone: 203-453-9911    
Dr. Robert Aaron Levine, MD
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 137 Winthrop Rd, Guilford, CT 06437
Phone: 203-671-0840    
Charles E. Glass, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 96a Broad St, Guilford, CT 06437
Phone: 203-453-3621    Fax: 203-453-4501
Mary J Scheimann, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 5 Durham Rd, Bdg 3, C-1, Guilford, CT 06437
Phone: 203-453-4444    Fax: 203-458-9477
Dr. Harold F Stepanek, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 741 Boston Post Rd, Suite 304, Guilford, CT 06437
Phone: 203-671-3561    Fax: 203-453-4594
Dr. Jonathan Thomas Puchalski, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 350 Goose Ln Ste 203b, Guilford, CT 06437
Phone: 203-738-7700    Fax: 203-689-6500
Donna R Criscenzo, M.D.
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 199 Goose Lane, Guilford, CT 06437
Phone: 203-458-2888    Fax: 203-458-2889

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.