Robert E. Dexter, M.D.
Internal Medicine Physician · Denver, CO
Robert E. Dexter, M.D. is an internal medicine physician with a practice address in Denver, Colorado, and NPI 1265562029, issued on Mar 7, 2007. Check the license (Colorado 42427, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Robert E. Dexter
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 42427 CO
Self-reported in NPPES; status is on the state search - Practice location
- 1375 E 20TH Ave, Denver, CO 80205
- Phone
- (303) 338-4545
- Enumerated
- Mar 7, 2007
- Record last updated
- Feb 1, 2022
- Medicaid ID
- 42088356 CO
- Medicare enrollment
- Enrolled (PECOS I20100208000494); accepts Medicare assignment
- Medical or professional school
- University Of Washington School Of Medicine, 2001
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,046 in Colorado → Look up another NPI →
Also registered at 1375 E 20TH Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jennifer Allen-Thomas, REGISTERED NURSERegistered Nurse1841327814
- Mana Amir, MDPulmonary Disease Physician1598731994
- Barbara Anderson, NPNurse Practitioner1962617076
- Sheri AndrusRegistered Nurse1750418638
- Sharisse Arnold Rehring, M.D.Pediatrics Physician1083741045
- Tyler Ashford, RNRegistered Nurse1568903383
Verify Robert E. Dexter in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 42427Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.4 times the Medicare Part D claims of the average internal medicine physician in 2024
7,615 Medicare Part D claims for 609 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 688 claims were for opioids.
Most prescribed
- Atorvastatin Calcium573 claims
- Losartan Potassium319 claims
- Amlodipine Besylate318 claims
- Hydrocodone-Acetaminophen296 claims
- Lisinopril260 claims
- Oxycodone Hcl240 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
- Kaiser Foundation Health Plan OF The NorthwestClackamas, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert E. Dexter among 2,046 internal medicine physician records in Colorado
Robert E. Dexter, M.D. 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 2007, is newer than 40% of them.
- NPI issued2007 · 40% of these records are older, 39% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2001 · median 2006 among the 1,090 with a school on file
- Record last updated2022 · 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).
493 internal medicine physician records list a practice address in Denver
They are 493 of the 25,068 NPPES records with a practice address in Denver, and 2,046 internal medicine physician records in Colorado.
All 2,046 in Colorado → Every provider in Denver → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Jennifer Adams, MDDenver, CO 802051386663946
- Joshua Blum, M.D.Denver, CO 802051770526881
- Sarah Brodhead, MDDenver, CO 802051851438121
- Daniela Grayeb, MDDenver, CO 802051700852886
- Everette Jones, MDDenver, CO 802051376518522
- Cathie Korey, MDDenver, CO 802051962484253
- David LeonardDenver, CO 802051801823422
- Daniel Lewis, MDDenver, CO 802051598784985
Common questions
What is Robert E. Dexter, M.D.'s NPI number?
Robert E. Dexter, M.D.'s National Provider Identifier (NPI) is 1265562029, issued on Mar 7, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Robert E. Dexter, M.D. located?
The NPPES record lists a practice address at 1375 E 20TH Ave, Denver, CO, 80205. Phone: (303) 338-4545. Providers update this record themselves, so call before visiting.
How can I verify Robert E. Dexter, M.D.'s license?
NPPES lists Colorado license number 42427, 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 Robert E. Dexter, M.D. prescribe under Medicare Part D?
In 2024, Robert E. Dexter, M.D. had 7,615 Medicare Part D claims for 609 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.