Dr William Douglas Gammon, PHD - Medicare Psychologist in Billerica, MA

Dr William Douglas Gammon, PHD is a medicare enrolled "Psychologist - Clinical" provider in Billerica, Massachusetts. He graduated from medical school in 1978 and has 46 years of diverse experience with area of expertise as Clinical Psychologist. His current practice location is 572 Boston Rd, Suite 14, Billerica, Massachusetts. You can reach out to his office (for appointments etc.) via phone at (781) 696-2070.

Dr William Douglas Gammon is licensed to practice in Massachusetts (license number 2402) 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 1306892898.

Contact Information

Dr William Douglas Gammon, PHD
572 Boston Rd, Suite 14,
Billerica, MA 01821-3776
(781) 696-2070
(978) 294-8977

Map and Direction




Healthcare Provider's Profile

Full NameDr William Douglas Gammon
GenderMale
SpecialityClinical Psychologist
Experience46 Years
Location572 Boston Rd, Billerica, Massachusetts
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 William Douglas Gammon graduated from medical school in 1978
  NPI Data:
  • NPI Number: 1306892898
  • Provider Enumeration Date: 05/26/2006
  • Last Update Date: 03/04/2015
  Medicare PECOS Information:
  • PECOS PAC ID: 5698788420
  • Enrollment ID: I20060724000016

Medical Identifiers

Medical identifiers for Dr William Douglas Gammon such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1306892898NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
103TC0700XPsychologist - Clinical 2402 (Massachusetts)Primary

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 William Douglas Gammon 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 William Douglas Gammon, PHD
572 Boston Rd, Suite 14,
Billerica, MA 01821

Ph: (781) 696-2070
Dr William Douglas Gammon, PHD
572 Boston Rd, Suite 14,
Billerica, MA 01821-3776

Ph: (781) 696-2070

Reviews and Comments


Psychologist in Billerica, MA

Dr. Ronald Louis Michaud, PHD
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Phone: 978-667-8977    Fax: 978-667-1238
Mrs. Lilian Ezereth Allen,
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Paul Sandler, ED.D.
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Practice Location: 505 Middlesex Tpke, Billerica, MA 01821
Phone: 978-663-7077    
Robert Viti, PSY.D.
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Medicare: Not Enrolled in Medicare
Practice Location: 572 Boston Rd, Suite 14, Billerica, MA 01821
Phone: 978-330-5150    Fax: 978-608-4102
Dr. Gina Marie Aguayo, PH.D.
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Medicare: Medicare Enrolled
Practice Location: 294 Concord Rd, Billerica, MA 01821
Phone: 978-330-5105    
Joan Esther Goldman, PHD
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Medicare: Not Enrolled in Medicare
Practice Location: 505 Middlesex Tpke, #3, Billerica, MA 01821
Phone: 978-663-7077    Fax: 617-527-2199

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.