Dr Shirley Pak So, MD - Medicare Geriatric Medicine in Worcester, MA

Dr Shirley Pak So, MD is a medicare enrolled "Internal Medicine - Geriatric Medicine" physician in Worcester, Massachusetts. She graduated from medical school in 2004 and has 20 years of diverse experience with area of expertise as Geriatric Medicine. She is a member of the group practice Umass Memorial Medical Group Inc and her current practice location is 291 Lincoln St, Worcester, Massachusetts. You can reach out to her office (for appointments etc.) via phone at (508) 334-6251.

Dr Shirley Pak So is licensed to practice in Massachusetts (license number 249041) and she also participates in the medicare program. She accepts medicare assignments (which means she accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and her NPI Number is 1639466592.

Contact Information

Dr Shirley Pak So, MD
291 Lincoln St,
Worcester, MA 01605-3643
(508) 334-6251
(508) 334-6906

Map and Direction




Physician's Profile

Full NameDr Shirley Pak So
GenderFemale
SpecialityGeriatric Medicine
Experience20 Years
Location291 Lincoln St, Worcester, Massachusetts
Accepts Medicare AssignmentsYes. She accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Dr Shirley Pak So graduated from medical school in 2004
  NPI Data:
  • NPI Number: 1639466592
  • Provider Enumeration Date: 06/29/2011
  • Last Update Date: 05/01/2022
  Medicare PECOS Information:
  • PECOS PAC ID: 7113198243
  • Enrollment ID: I20110922000164

Medical Identifiers

Medical identifiers for Dr Shirley Pak So such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1639466592NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RG0300XInternal Medicine - Geriatric Medicine 249041 (Massachusetts)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Notre Dame HospiceWorcester, MAHospice
Umass Memorial Medical Center/university CampusWorcester, MAHospital
Notre Dame Long Term Care CenterWorcester, MANursing home
Shrewsbury Nursing & Rehabilitation CenterShrewsbury, MANursing home

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Umass Memorial Medical Group Inc42845398911889

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 Shirley Pak So allows following entities to bill medicare on her behalf.
Entity NameUmass Memorial Medical Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1760445373
PECOS PAC ID: 4284539891
Enrollment ID: O20040113000267

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 Shirley Pak So 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 Shirley Pak So, MD
Po Box 415348,
Boston, MA 02241-5348

Ph: (800) 225-8885
Dr Shirley Pak So, MD
291 Lincoln St,
Worcester, MA 01605-3643

Ph: (508) 334-6251

Reviews and Comments


Internal Medicine Doctors in Worcester, MA

Dr. Adepeju Gbadebo Champion, M.D.
Geriatric Medicine
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.
Geriatric Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 123 Summer St, Worcester, MA 01608
Phone: 508-363-6849    
Sowmya Korapati,
Geriatric Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 55 Lake Ave N, Worcester, MA 01655
Phone: 508-334-3550    Fax: 774-442-6715
Irma Hashmi, DO
Geriatric Medicine
Medicare: Medicare Enrolled
Practice Location: 55 Lake Ave N, Worcester, MA 01655
Phone: 508-334-1000    
Dr. Madhav Sharma, MD
Geriatric Medicine
Medicare: Medicare Enrolled
Practice Location: 123 Summer St, Worcester, MA 01608
Phone: 508-363-5438    
Daniel M Steigman, MD
Geriatric Medicine
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.
Geriatric Medicine
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.