Mary Therese Barrett, M.D.
Specialist · Longmont, CO
Mary Therese Barrett, M.D. is a specialist with a practice address in Longmont, Colorado, and NPI 1902983976, issued on Nov 1, 2006. Check the license (Colorado CDRH.0029546, as entered in NPPES) with the Colorado board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mary Therese Barrett
- Credential
- M.D.
- Primary taxonomy
- Specialist 174400000X
- License numbers
- CDRH.0029546 CO
29546 CO
01074809B IN
31245 MN
12641 ND
and 1 more
Self-reported in NPPES; status is on the state search - Practice location
- 231 E 9TH Ave Ste 1A, Longmont, CO 80504
- Phone
- (303) 651-2800
- Enumerated
- Nov 1, 2006
- Record last updated
- May 12, 2026
- Fax
- (303) 774-9100
- Medicare enrollment
- Enrolled (PECOS I20241016003069); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest specialist records → All 1,105 in Colorado → Look up another NPI →
Verify Mary Therese Barrett in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Colorado board licenses this profession
Search for license CDRH.0029546Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average specialist in 2024
125 Medicare Part D claims for 39 beneficiaries, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D. Brand-name drugs were 26% of claims.
Most prescribed
- Estradiol33 claims
- Progesterone16 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $32.33
1 payment: food and beverage; the largest payer was Astellas Pharma US Inc. The 5,844 providers of this specialty with any payment received $4,760.79 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Iowa Physicians Clinic Medical FoundationWaterloo, IA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary Therese Barrett among 1,105 specialist records in Colorado
Mary Therese Barrett, M.D. is one of 1,105 specialist records with a practice address in Colorado. 12% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 76% newer
- In a Medicare fileYes · 12% of these records are
- In the CMS Doctors and Clinicians fileYes · 8% of these records are
- Graduated1985 · median 1993 among the 86 with a school on file
- Record last updated2026 · 89% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
23 specialist records list a practice address in Longmont
They are 23 of the 2,381 NPPES records with a practice address in Longmont, and 1,105 specialist records in Colorado.
All 1,105 in Colorado → Every provider in Longmont → Specialist nationwide →
The 8 specialist records with the nearest ZIP codes
- Karie FisherLongmont, CO 805031831360270
- Mary Graeff GomezLongmont, CO 805031447104658
- Amanda HerbstreithLongmont, CO 805031730354168
- Lois Hickma N, O.T.R.Longmont, CO 805031285763714
- Pauline Morrow, PA-CLongmont, CO 805031629142484
- Sally Thompson, C.M.T.Longmont, CO 805031427368299
- Penny Trevithick, CBSLongmont, CO 805031124357082
- Pauline Wright, OTR/LNiwot, CO 805031326222852
Common questions
What is Mary Therese Barrett, M.D.'s NPI number?
Mary Therese Barrett, M.D.'s National Provider Identifier (NPI) is 1902983976, issued on Nov 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mary Therese Barrett, M.D. located?
The NPPES record lists a practice address at 231 E 9TH Ave Ste 1A, Longmont, CO, 80504. Phone: (303) 651-2800. Providers update this record themselves, so call before visiting.
How can I verify Mary Therese Barrett, M.D.'s license?
NPPES lists Colorado license number CDRH.0029546, as entered by the provider. Search the Colorado board that licenses this profession; the NPPES record confirms identity only.
How much does Mary Therese Barrett, M.D. prescribe under Medicare Part D?
In 2024, Mary Therese Barrett, M.D. had 125 Medicare Part D claims for 39 beneficiaries; the average among specialist prescribers was 1,380. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.