Cassandra Maria Bresnahan, MD
Internal Medicine Physician · Sterling, CO
Cassandra Maria Bresnahan, MD is an internal medicine physician with a practice address in Sterling, Colorado, and NPI 1922031921, issued on Jul 10, 2006. Check the license (Colorado 43762, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Cassandra Maria Bresnahan
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 43762 CO
DR.0043762 CO
Self-reported in NPPES; status is on the state search - Practice location
- 615 Fairhurst St, Sterling, CO 80751
- Phone
- (970) 522-0122
- Enumerated
- Jul 10, 2006
- Record last updated
- Sep 26, 2023
- Medicare enrollment
- Enrolled (PECOS I20100913000815); accepts Medicare assignment
- Medical or professional school
- University Of Toledo College Of Medicine, 2003
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,046 in Colorado → Look up another NPI →
Also registered at 615 Fairhurst St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mohit Agarwal, MDRadiation Oncology Physician1609371459
- Megan Armstrong-FrankPhysician Assistant1306797881
- Jeffrey Bacon, D.O.Family Medicine Physician1255391132
- Paige Barco, NPNurse Practitioner1609512672
- Eric Becker, PA-CPhysician Assistant1376875138
- Timothy Bresnahan, MDInternal Medicine Physician1205860202
Verify Cassandra Maria Bresnahan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 43762Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average internal medicine physician in 2024
70 Medicare Part D claims for 33 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 24% of 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.
Bills Medicare through one group practice
- Red Mountain Internal MedicineSterling, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Cassandra Maria Bresnahan among 2,046 internal medicine physician records in Colorado
Cassandra Maria Bresnahan, MD is one of 2,046 internal medicine physician records with a practice address in Colorado. 71% 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 10% of them.
- NPI issued2006 · 10% of these records are older, 60% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2003 · median 2006 among the 1,090 with a school on file
- Record last updated2023 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
6 internal medicine physician records list a practice address in Sterling
They are 6 of the 313 NPPES records with a practice address in Sterling, and 2,046 internal medicine physician records in Colorado.
All 2,046 in Colorado → Every provider in Sterling → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Timothy Bresnahan, MDSterling, CO 807511205860202
- Richard Lamb, M.D.Sterling, CO 807511932105186
- Daniel Lambrecht, M.D.Sterling, CO 807511083032817
- James Miller, MDSterling, CO 807511033113733
- Thomas Soper, D.O.Sterling, CO 807511689643900
- Stephen Godar, MDFort Morgan, CO 807011992719876
- Anita Bloor, M.D.Limon, CO 808261346316130
- Kay Redman, MDLimon, CO 808281154321818
Common questions
What is Cassandra Maria Bresnahan, MD's NPI number?
Cassandra Maria Bresnahan, MD's National Provider Identifier (NPI) is 1922031921, issued on Jul 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Cassandra Maria Bresnahan, MD located?
The NPPES record lists a practice address at 615 Fairhurst St, Sterling, CO, 80751. Phone: (970) 522-0122. Providers update this record themselves, so call before visiting.
How can I verify Cassandra Maria Bresnahan, MD's license?
NPPES lists Colorado license number 43762, 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 Cassandra Maria Bresnahan, MD prescribe under Medicare Part D?
In 2024, Cassandra Maria Bresnahan, MD had 70 Medicare Part D claims for 33 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.