Catharina Armstrong, MD - Medicare Infectious Disease in Worcester, MA

Catharina Armstrong, MD is a medicare enrolled "Internal Medicine" physician in Worcester, Massachusetts. She graduated from medical school in 2003 and has 21 years of diverse experience with area of expertise as Infectious Disease. She is a member of the group practice Newton-wellesley Medical Group, Inc. and her current practice location is 119 Belmont St, Worcester, Massachusetts. You can reach out to her office (for appointments etc.) via phone at (508) 334-8515.

Catharina Armstrong is licensed to practice in Massachusetts (license number L-221067) 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 1538295217.

Contact Information

Catharina Armstrong, MD
119 Belmont St,
Worcester, MA 01605-2903
(508) 334-8515
(508) 334-6490

Map and Direction




Physician's Profile

Full NameCatharina Armstrong
GenderFemale
SpecialityInfectious Disease
Experience21 Years
Location119 Belmont 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:
  • Catharina Armstrong graduated from medical school in 2003
  NPI Data:
  • NPI Number: 1538295217
  • Provider Enumeration Date: 02/26/2007
  • Last Update Date: 03/25/2021
  Medicare PECOS Information:
  • PECOS PAC ID: 1153476627
  • Enrollment ID: I20090904000330

Medical Identifiers

Medical identifiers for Catharina Armstrong such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1538295217NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine L-221067 (Massachusetts)Primary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Newton-wellesley Medical Group, Inc.0244133494392

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. Catharina Armstrong allows following entities to bill medicare on her behalf.
Entity NameNewton-wellesley Medical Group, Inc.
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1538191218
PECOS PAC ID: 0244133494
Enrollment ID: O20040127001012

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. Catharina Armstrong 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
Catharina Armstrong, MD
Massachusetts General Hospital, 55 Fruit Street,
Boston, MA 02114

Ph: (617) 726-2066
Catharina Armstrong, MD
119 Belmont St,
Worcester, MA 01605-2903

Ph: (508) 334-8515

Reviews and Comments


Internal Medicine Doctors in Worcester, MA

Dr. Adepeju Gbadebo Champion, M.D.
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Phone: 508-334-2731    Fax: 774-442-4672
Madaiah Lokeshwari, M.D.
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Phone: 508-334-3550    Fax: 774-442-6715
Irma Nadeem Hashmi, DO
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Practice Location: 55 Lake Ave N, Worcester, MA 01655
Phone: 508-334-1000    
Dr. Madhav Sharma, MD
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Phone: 508-363-5438    
Daniel M Steigman, MD
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Practice Location: 123 Summer Street, Suite 390, Worcester, MA 01608
Phone: 508-368-3120    Fax: 508-368-3121
Dr. Julia D Andrieni, M.D.
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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.

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