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DR. MARY THERESE BARRETT M.D.
NPI 1902983976
Specialist in Longmont, CO

Active since November 01, 2006PECOS EnrolledAccepts Medicare Assignment
231 E 9TH AVE STE 1A, LONGMONT, CO 80504(303) 651-2800(303) 774-9100 Get Directions Write a Review

NPPES record last updated: May 12, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: May 12, 2026, Aug 13, 2025, Jun 7, 2024 and 2 more (5 updates tracked since 2016).

About Dr. Mary Therese Barrett M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. MARY THERESE BARRETT M.D. (NPI 1902983976) is an individual specialist in Longmont, Colorado, licensed in Colorado (CDRH.0029546) and active in the NPI registry since November 2006. She is enrolled in Medicare PECOS and is a graduate of Other (1985).

NPPES Registry Identity

NPI1902983976
Entity TypeIndividualFemale
Primary Taxonomy174400000X
Provider Legal NameDR. MARY THERESE BARRETTCredential: M.D.
Location Address231 E 9TH AVE STE 1ALongmont, CO 80504-4687
Mailing Address231 E 9th AveLongmont, CO 80504-4686 · (303) 651-2800 · Fax (303) 774-9100
Phone(303) 651-2800
Fax(303) 774-9100
Sole ProprietorYes
Medical School CMSOtherGraduated 1985
Enumeration DateNovember 1, 2006
Last NPPES UpdateMay 12, 20265 updates tracked since enumeration
NPPES CertifiedMay 12, 2026
✔ NPI 1902983976 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtySpecialistOther Service Providers
Taxonomy Code174400000X
Licenses✔ Licensed in CO · CDRH.0029546✔ Licensed in CO · 29546
Definition
An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.
Also ListedObstetrics & GynecologyTaxonomy 207V00000X · License 12641 (ND), 31245 (MN), MD16855 (RI), 01074809B (IN)
231 E 9TH AVE STE 1A, Longmont, CO 80504
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Premera Blue Cross Blue Shield of Alaska, Security Health Plan, Wellmark Health Plan of Iowa, Inc..Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Mary Therese Barrett M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID6002901873
PECOS Enrollment IDI20071009000487, I20170914003753, I20241016003069
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

4

Medicare enrollment records show Mary Barrett reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

M. Therese Barrett, MD PC
0.6 mi
Specialist
231 E 9TH AVE, SUITE 1A
Longmont, CO 80504
  • Reassigned Medicare billing, Colorado enrollment
NPI 1568669943 (303) 651-2800
Iowa Physicians Clinic Medical Foundation
503 mi
Rural Health
111 MAIN ST
Kingsley, IA 51028
  • Reassigned Medicare billing, Iowa enrollment
  • 1,506 clinicians in this Medicare group
NPI 1659263523 (712) 378-2921
Allen Memorial Hospital Corporation
682 mi
Women's Health
233 VOLD DR
Waterloo, IA 50703
  • Reassigned Medicare billing, Iowa enrollment
  • 273 clinicians in this Medicare group
NPI 1891772927 (319) 235-5090
Sanford Health Of Northern Minnesota
700 mi
Rural Health
1656 CENTRAL ST W
Bagley, MN 56621
  • Reassigned Medicare billing, Minnesota enrollment
  • 607 clinicians in this Medicare group
NPI 1972875490 (218) 694-2384

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 3

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
27 services22 patients
Cervical or vaginal cancer screening; pelvic and clinical breast examination G0101
This procedure involves checking for health issues in the lower abdomen and chest area. It helps identify early signs of certain conditions, increasing the chance for successful treatment. It's a routine check-up that's important for maintaining good health.
21 services21 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
15 services13 patients

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mary Barrett's NPI number?

The NPI number for Mary Barrett is 1902983976. It was assigned to this individual provider in the NPPES registry on November 1, 2006.

Where is Mary Barrett located?

Mary Barrett practices at 231 E 9th Ave Ste 1A, Longmont, CO 80504. The listed phone number is (303) 651-2800.

What is Mary Barrett's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Is Mary Barrett enrolled in Medicare?

Yes. Mary Barrett is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Mary Barrett's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mary Barrett reassigns Medicare benefits to 4 organizations: M. Therese Barrett, MD PC (Longmont, CO), Iowa Physicians Clinic Medical Foundation (Kingsley, IA), Allen Memorial Hospital Corporation (Waterloo, IA) and Sanford Health Of Northern Minnesota (Bagley, MN). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Mary Barrett's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mary Barrett accept?

Health plans from Premera Blue Cross Blue Shield of Alaska, Security Health Plan and Wellmark Health Plan of Iowa, Inc. list Mary Barrett as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Mary Barrett was last updated on May 12, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.