Mark A. Dennis, M.D.
Diagnostic Radiology Physician · Englewood, CO
Mark A. Dennis, M.D. is a diagnostic radiology physician with a practice address in Englewood, Colorado, and NPI 1649256561, issued on Dec 22, 2005. Check the license (Colorado 23198, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mark A. Dennis
- Credential
- M.D.
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License numbers
- 23198 CO
MD17507 HI
04-36688 KS
25104 NE
Self-reported in NPPES; status is on the state search - Practice location
- 10800 E Geddes Ave Ste 300, Englewood, CO 80112
- Phone
- (303) 761-9190
- Enumerated
- Dec 22, 2005
- Record last updated
- Dec 14, 2022
- Fax
- (720) 874-4462
- Medicaid IDs
- 10025709000 NE
2301381 LA
1649256561 WY
1649256561 IA - Medicare enrollment
- Enrolled (PECOS I20091002000065); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest diagnostic radiology physician records → All 796 in Colorado → Look up another NPI →
Also registered at 10800 E Geddes Ave Ste 300
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- John Anderson, D.O.Diagnostic Radiology Physician1174937072
- Daniel April, M.D.Diagnostic Radiology Physician1851748057
- Annemarie Aubry, APRNNurse Practitioner1578165262
- Aria Bagheri, MDDiagnostic Radiology Physician1649769969
Verify Mark A. Dennis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 23198Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Medical Imaging OF Colorado Radiology Imaging Assc PC Etal PTEnglewood, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark A. Dennis among 796 diagnostic radiology physician records in Colorado
Mark A. Dennis, M.D. is one of 796 diagnostic radiology physician records with a practice address in Colorado. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 86% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated1979 · median 2006 among the 562 with a school on file
- Record last updated2022 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
120 diagnostic radiology physician records list a practice address in Englewood
They are 120 of the 2,840 NPPES records with a practice address in Englewood, and 796 diagnostic radiology physician records in Colorado.
All 796 in Colorado → Every provider in Englewood → Diagnostic Radiology Physician nationwide →
The 8 diagnostic radiology physician records with the nearest ZIP codes
- Sarah Beale, MDEnglewood, CO 801121164406310
- Ross Goldstein, MDEnglewood, CO 801121972586998
- William Graf, M.D.Englewood, CO 801121568433209
- Phillip Gunther, MDEnglewood, CO 801121922083401
- Orlin Hopper, MDEnglewood, CO 801121144294752
- Paul Hsieh, MDEnglewood, CO 801121861453789
- Craig Jonas, MDEnglewood, CO 801121184609513
- Aaron Kirkpatrick, MDEnglewood, CO 801121851372866
Common questions
What is Mark A. Dennis, M.D.'s NPI number?
Mark A. Dennis, M.D.'s National Provider Identifier (NPI) is 1649256561, issued on Dec 22, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mark A. Dennis, M.D. located?
The NPPES record lists a practice address at 10800 E Geddes Ave Ste 300, Englewood, CO, 80112. Phone: (303) 761-9190. Providers update this record themselves, so call before visiting.
How can I verify Mark A. Dennis, M.D.'s license?
NPPES lists Colorado license number 23198, 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.
What is Mark A. Dennis, M.D.'s MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.