Dr Mary Therese Barrett, MD - Medicare Obstetrics/gynecology in Longmont, CO

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Dr Mary Therese Barrett, MD is a medicare enrolled "Specialist" physician in Longmont, Colorado. She graduated from medical school in 1985 and has 41 years of diverse experience with area of expertise as Obstetrics/gynecology. She is a member of the group practice Iowa Physicians Clinic Medical Foundation and her current practice location is 231 E 9th Ave Ste 1a, Longmont, Colorado. You can reach out to her office (for appointments etc.) via phone at (303) 651-2800.

Dr Mary Therese Barrett is licensed to practice in Colorado (license number CDRH.0029546) 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 1902983976.

Contact Information

Dr Mary Therese Barrett, MD
231 E 9th Ave Ste 1a,
Longmont, CO 80504-4687
(303) 651-2800
(303) 774-9100

Map and Direction




Physician's Profile

Full NameDr Mary Therese Barrett
GenderFemale
SpecialityObstetrics/gynecology
Experience41 Years
Location231 E 9th Ave Ste 1a, Longmont, Colorado
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 Mary Therese Barrett graduated from medical school in 1985
  NPI Data:
  • NPI Number: 1902983976
  • Provider Enumeration Date: 11/01/2006
  • Last Update Date: 05/12/2026
  Medicare PECOS Information:
  • PECOS PAC ID: 6002901873
  • Enrollment ID: I20241016003069

Medical Identifiers

Medical identifiers for Dr Mary Therese Barrett such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1902983976NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207V00000XObstetrics & Gynecology 12641 (North Dakota)Secondary
207V00000XObstetrics & Gynecology 31245 (Minnesota)Secondary
207V00000XObstetrics & Gynecology MD16855 (Rhode Island)Secondary
174400000XSpecialist 29546 (Colorado)Secondary
207V00000XObstetrics & Gynecology 01074809B (Indiana)Secondary
174400000XSpecialist CDRH.0029546 (Colorado)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Allen HospitalWaterloo, IAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Iowa Physicians Clinic Medical Foundation87299923181234

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 Mary Therese Barrett allows following entities to bill medicare on her behalf.
Entity NameIowa Physicians Clinic Medical Foundation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1366425274
PECOS PAC ID: 8729992318
Enrollment ID: O20031118000363
Entity NameAllen Memorial Hospital Corporation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1891772927
PECOS PAC ID: 4284546045
Enrollment ID: O20031211000480

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 Mary Therese Barrett 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 Mary Therese Barrett, MD
231 E 9th Ave,
Longmont, CO 80504-4686

Ph: (303) 651-2800		Dr Mary Therese Barrett, MD
231 E 9th Ave Ste 1a,
Longmont, CO 80504-4687

Ph: (303) 651-2800

Reviews and Comments



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.