Zoe Ann Gillis, MD - Medicare Obstetrics & Gynecology in Ayer, MA

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Zoe Ann Gillis, MD is a medicare enrolled "Obstetrics & Gynecology" physician in Ayer, Massachusetts. Her current practice location is 198 Groton Road, Ayer, Massachusetts. You can reach out to her office (for appointments etc.) via phone at (978) 784-9831.

Zoe Ann Gillis is licensed to practice in Massachusetts (license number 229772) 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 1437174141.

Contact Information

Zoe Ann Gillis, MD
198 Groton Road,
Ayer, MA 01432
(978) 784-9831
(978) 772-0113

Map and Direction




Physician's Profile

Full NameZoe Ann Gillis
GenderFemale
SpecialityObstetrics & Gynecology
Location198 Groton Road, Ayer, Massachusetts
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1437174141
  • Provider Enumeration Date: 07/13/2006
  • Last Update Date: 03/04/2009
  Medicare PECOS Information:
  • PECOS PAC ID: 2769488360
  • Enrollment ID: I20061004000343

Medical Identifiers

Medical identifiers for Zoe Ann Gillis such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1437174141NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207V00000XObstetrics & Gynecology 229772 (Massachusetts)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. Zoe Ann Gillis allows following entities to bill medicare on her behalf.
Entity NameSteward Medical Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1629398219
PECOS PAC ID: 2860688728
Enrollment ID: O20101119000007

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. Zoe Ann Gillis 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
Zoe Ann Gillis, MD
200 Groton Road, Nashoba Valley Healthcare Group,
Ayer, MA 01432

Ph: (978) 784-9000		Zoe Ann Gillis, MD
198 Groton Road,
Ayer, MA 01432

Ph: (978) 784-9831

Reviews and Comments


Obstetrics & Gynecology Doctors in Ayer, MA


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.