Theresa Callahan, MD - Medicare Pediatric Medicine in Leominster, MA

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Theresa Callahan, MD is a medicare enrolled "Pediatrics" physician in Leominster, Massachusetts. She went to University Of Massachusetts Medical School and graduated in 1991 and has 33 years of diverse experience with area of expertise as Pediatric Medicine. She is a member of the group practice Medical Associates Pediatrics, P.c. and her current practice location is 100 Hospital Rd, Suite 4, Leominster, Massachusetts. You can reach out to her office (for appointments etc.) via phone at (978) 514-6300.

Theresa Callahan is licensed to practice in Massachusetts (license number 80890) 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 1861480931.

Contact Information

Theresa Callahan, MD
100 Hospital Rd, Suite 4,
Leominster, MA 01453-2253
(978) 514-6300
(978) 514-6324

Map and Direction




Physician's Profile

Full NameTheresa Callahan
GenderFemale
SpecialityPediatric Medicine
Experience33 Years
Location100 Hospital Rd, Leominster, 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:
  • Theresa Callahan attended and graduated from University Of Massachusetts Medical School in 1991
  NPI Data:
  • NPI Number: 1861480931
  • Provider Enumeration Date: 10/12/2005
  • Last Update Date: 06/24/2011
  Medicare PECOS Information:
  • PECOS PAC ID: 0345282356
  • Enrollment ID: I20060227000089

Medical Identifiers

Medical identifiers for Theresa Callahan such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1861480931NPI-NPPES
3141454MedicaidMA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
208000000XPediatrics 80890 (Massachusetts)Primary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Medical Associates Pediatrics, P.c.67098287184

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. Theresa Callahan allows following entities to bill medicare on her behalf.
Entity NameMedical Associates Pediatrics, P.c.
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1417946161
PECOS PAC ID: 6709828718
Enrollment ID: O20050531000480

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. Theresa Callahan 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
Theresa Callahan, MD
100 Hospital Rd, Suite 4,
Leominster, MA 01453-2253

Ph: (978) 514-6300		Theresa Callahan, MD
100 Hospital Rd, Suite 4,
Leominster, MA 01453-2253

Ph: (978) 514-6300

Reviews and Comments


Pediatrics Doctors in Leominster, MA

Janice Lee Son, M.D.
Pediatrics
Medicare: Not Enrolled in Medicare
Practice Location: 60 Hospital Rd, Leominster, MA 01453
Phone: 978-466-2257    
Lazaros Xanthopoulos, MD
Pediatrics
Medicare: Medicare Enrolled
Practice Location: 60 Hospital Rd, Leominster, MA 01453
Phone: 978-466-2000    
Michael Lyons, M.D.
Pediatrics
Medicare: Medicare Enrolled
Practice Location: 100 Hospital Rd, Suite 4, Leominster, MA 01453
Phone: 978-514-6300    Fax: 978-514-6324
Dr. Rashmi Bhopi, M.D
Pediatrics
Medicare: Not Enrolled in Medicare
Practice Location: 60 Hospital Rd, Leominster, MA 01453
Phone: 978-466-2257    Fax: 978-466-2291
Toby M Milgrome, MD
Pediatrics
Medicare: Medicare Enrolled
Practice Location: 165 Mill St, Leominster, MA 01453
Phone: 978-534-6500    Fax: 978-534-2991
Sejal Daga, M.D.
Pediatrics
Medicare: Medicare Enrolled
Practice Location: 100 Hospital Rd, Suite 4, Leominster, MA 01453
Phone: 978-514-6300    Fax: 978-514-6324
Ingrid Cruse, M.D.
Pediatrics
Medicare: Medicare Enrolled
Practice Location: 100 Hospital Rd, Suite 4, Leominster, MA 01453
Phone: 978-514-6300    Fax: 978-514-6324

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.