Eric D. Mast, D.O.
Family Medicine Physician · Longmont, CO
Eric D. Mast, D.O. is a family medicine physician with a practice address in Longmont, Colorado, and NPI 1427346287, issued on Jul 14, 2011. Check the license (Colorado 54581, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Eric D. Mast
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 54581 CO
Self-reported in NPPES; status is on the state search - Practice location
- 205 S. Main St., Longmont, CO 80501
- Phone
- (303) 772-6244
- Enumerated
- Jul 14, 2011
- Record last updated
- Apr 6, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (303) 702-1623
- Medicaid ID
- 46125086 CO
- Medicare enrollment
- Enrolled (PECOS I20160923000862); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 3,563 in Colorado → Look up another NPI →
Verify Eric D. Mast in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 54581Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
10% more Medicare Part D claims than the average family medicine physician in 2024
3,881 Medicare Part D claims for 341 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 133 claims were for opioids.
Most prescribed
- Atorvastatin Calcium281 claims
- Levothyroxine Sodium169 claims
- Lisinopril164 claims
- Amlodipine Besylate145 claims
- Losartan Potassium113 claims
- Gabapentin97 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: $38.39
2 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 55,478 providers of this specialty with any payment received $902.55 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 2 group practices
- Banner Fort Collins Pcp LLCLongmont, CO
- Vmd Primary Providers Colorado IncLongmont, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Eric D. Mast among 3,563 family medicine physician records in Colorado
Eric D. Mast, D.O. is one of 3,563 family medicine physician records with a practice address in Colorado. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 67% of them.
- NPI issued2011 · 67% of these records are older, 31% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2013 · median 2008 among the 2,077 with a school on file
- Record last updated2017 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
73 family medicine physician records list a practice address in Longmont
They are 73 of the 2,381 NPPES records with a practice address in Longmont, and 3,563 family medicine physician records in Colorado.
All 3,563 in Colorado → Every provider in Longmont → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Eric Benson, MDLongmont, CO 805011487658878
- David Britt, MDLongmont, CO 805011427052836
- Catherine Cavender, MDLongmont, CO 805011295739613
- Mary Faini, MDLongmont, CO 805011144222373
- James Freudenburg, MDLongmont, CO 805011710982137
- John Fritz, D.O.Longmont, CO 805011487655478
- Mark Hinman, M.D.Longmont, CO 805011750385415
- Richard Jacobi, MDLongmont, CO 805011639174733
Common questions
What is Eric D. Mast, D.O.'s NPI number?
Eric D. Mast, D.O.'s National Provider Identifier (NPI) is 1427346287, issued on Jul 14, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Eric D. Mast, D.O. located?
The NPPES record lists a practice address at 205 S. Main St., Longmont, CO, 80501. Phone: (303) 772-6244. Providers update this record themselves, so call before visiting.
How can I verify Eric D. Mast, D.O.'s license?
NPPES lists Colorado license number 54581, as entered by the provider. Search the Colorado Medical Board at https://dpo.colorado.gov/Medical. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Eric D. Mast, D.O. prescribe under Medicare Part D?
In 2024, Eric D. Mast, D.O. had 3,881 Medicare Part D claims for 341 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.