Robert Gleser, M.D.
Internal Medicine Physician · Denver, CO
Robert Gleser, M.D. is an internal medicine physician with a practice address in Denver, Colorado, and NPI 1679538516, issued on Apr 20, 2006. Check the license (Colorado 21533, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Robert Gleser
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 21533 CO
Self-reported in NPPES; status is on the state search - Practice location
- 4700 E Iliff Ave, Denver, CO 80222
- Phone
- (303) 584-8900
- Enumerated
- Apr 20, 2006
- Record last updated
- Jun 22, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (720) 524-9475
- Medicare enrollment
- Enrolled (PECOS I20200423002110); may accept Medicare assignment
- 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 4700 E Iliff Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Colleen Busch, M.S.N., F.N.P.Family Nurse Practitioner1154465938
- Jennifer Cammilleri, FNP-BCFamily Nurse Practitioner1194193631
- Haley Chiado, PA-CMedical Physician Assistant1306216627
- Gretchen Frey, MDObstetrics & Gynecology Physician1326154014
- Janet Garcia, FNPFamily Nurse Practitioner1952003733
- Kristin Haber, MDInternal Medicine Physician1598835894
Verify Robert Gleser in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 21533Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.3 times the Medicare Part D claims of the average internal medicine physician in 2024
7,421 Medicare Part D claims for 732 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 142 claims were for opioids.
Most prescribed
- Atorvastatin Calcium500 claims
- Levothyroxine Sodium336 claims
- Losartan Potassium317 claims
- Rosuvastatin Calcium301 claims
- Amlodipine Besylate256 claims
- Alendronate Sodium209 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
- Regents Univ OF California UcsfSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert Gleser among 2,046 internal medicine physician records in Colorado
Robert Gleser, 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 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
- Graduated1970 · median 2006 among the 1,090 with a school on file
- Record last updated2018 · 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
- William Alford, M.D.Denver, CO 802221386602456
- Richard Capek, MDDenver, CO 802221457452096
- Kristin Haber, MDDenver, CO 802221598835894
- Lynn IwaniecDenver, CO 802221235190661
- Jennifer Mix, DODenver, CO 802221477631521
- Wayne Peters, M.D.Denver, CO 802221649235599
- Walker Pride, MDDenver, CO 802221295312957
- Garland Truitt, M.D.Denver, CO 802221629104658
Common questions
What is Robert Gleser, M.D.'s NPI number?
Robert Gleser, M.D.'s National Provider Identifier (NPI) is 1679538516, issued on Apr 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert Gleser, M.D. located?
The NPPES record lists a practice address at 4700 E Iliff Ave, Denver, CO, 80222. Phone: (303) 584-8900. Providers update this record themselves, so call before visiting.
How can I verify Robert Gleser, M.D.'s license?
NPPES lists Colorado license number 21533, 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 Gleser, M.D. prescribe under Medicare Part D?
In 2024, Robert Gleser, M.D. had 7,421 Medicare Part D claims for 732 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.