Gregory T Williams, MD - Medicare in Worcester, MA

Gregory T Williams, MD is a medicare enrolled "Internal Medicine - Infectious Disease" physician in Worcester, Massachusetts. His current practice location is 123 Summer Street, Suite 220 S, Worcester, Massachusetts. You can reach out to his office (for appointments etc.) via phone at (508) 368-3122.

Gregory T Williams is licensed to practice in Massachusetts (license number 79617) 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 1043288848.

Contact Information

Gregory T Williams, MD
123 Summer Street, Suite 220 S,
Worcester, MA 01608
(508) 368-3122
(508) 368-3121

Map and Direction




Physician's Profile

Full NameGregory T Williams
GenderMale
Speciality
Experience Years
Location123 Summer Street, Worcester, 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:
  • Gregory T Williams attended and graduated from in
  NPI Data:
  • NPI Number: 1043288848
  • Provider Enumeration Date: 03/09/2006
  • Last Update Date: 03/04/2009
  Medicare PECOS Information:
  • PECOS PAC ID:
  • Enrollment ID:

Medical Identifiers

Medical identifiers for Gregory T Williams such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1043288848NPI-NPPES
AA2844OtherHARVARD PILGRIM HEALTHCAR
J14908OtherBLUE SHIELD IDEMNITY
J14908OtherBLUE SHIELD HMO BLUE
042472266OtherHEALTHCARE VALUE MANAGEME
3130711MedicaidMA
784106OtherMVP HEALTH CARE
042472266OtherPRIVATE HEALTHCARE SYSTEM
1061518OtherFIRST HEALTH
26881OtherHEALTHY START
042472266OtherONE HEALTH PLAN
J14908OtherBLUE CARE ELECT
26881OtherCHILDRENS MEDICAL SECURIT
5218590OtherCIGNA HEALTH PLAN
91119OtherFALLON COMMUNITY HEALTH P
5237703OtherAETNA US HEALTHCARE
9200061OtherEVERCARE

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 79617 (Massachusetts)Secondary
207RI0200XInternal Medicine - Infectious Disease 79617 (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. Gregory T Williams 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
Gregory T Williams, MD
630 Plantation St,
Worcester, MA 01605

Ph: (508) 368-3122
Gregory T Williams, MD
123 Summer Street, Suite 220 S,
Worcester, MA 01608

Ph: (508) 368-3122

Reviews and Comments


Internal Medicine Doctors in Worcester, MA

Dr. Adepeju Gbadebo Champion, M.D.
Infectious Disease
Medicare: Not Enrolled in Medicare
Practice Location: 55 Lake Ave N, Worcester, MA 01655
Phone: 508-334-2731    Fax: 774-442-4672
Madaiah Lokeshwari, M.D.
Infectious Disease
Medicare: Accepting Medicare Assignments
Practice Location: 123 Summer St, Worcester, MA 01608
Phone: 508-363-6849    
Sowmya Korapati,
Infectious Disease
Medicare: Accepting Medicare Assignments
Practice Location: 55 Lake Ave N, Worcester, MA 01655
Phone: 508-334-3550    Fax: 774-442-6715
Irma Hashmi, DO
Infectious Disease
Medicare: Medicare Enrolled
Practice Location: 55 Lake Ave N, Worcester, MA 01655
Phone: 508-334-1000    
Dr. Madhav Sharma, MD
Infectious Disease
Medicare: Medicare Enrolled
Practice Location: 123 Summer St, Worcester, MA 01608
Phone: 508-363-5438    
Daniel M Steigman, MD
Infectious Disease
Medicare: Medicare Enrolled
Practice Location: 123 Summer Street, Suite 390, Worcester, MA 01608
Phone: 508-368-3120    Fax: 508-368-3121
Dr. Julia D Andrieni, M.D.
Infectious Disease
Medicare: Not Enrolled in Medicare
Practice Location: 55 Lake Ave N, Department Of General Medicine, Worcester, MA 01655
Phone: 508-334-2731    

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.