Mark A. Chidel, MD
Radiation Oncology Physician · Denver, CO
Mark A. Chidel, MD is a radiation oncology physician with a practice address in Denver, Colorado, and NPI 1780711366, issued on Feb 28, 2007. Check the license (Colorado 40739, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mark A. Chidel
- Credential
- MD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- 40739 CO
Self-reported in NPPES; status is on the state search - Practice location
- 1375 E 19TH Ave, Denver, CO 80218
- Phone
- (303) 338-4545
- Enumerated
- Feb 28, 2007
- Record last updated
- Jun 23, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 79583571 CO
- Medicare enrollment
- Enrolled (PECOS I20040629000891); accepts Medicare assignment
- Medical or professional school
- University Of Michigan Medical School, 1995
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 111 in Colorado → Look up another NPI →
Also registered at 1375 E 19TH Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Bruce Adams, M.D.Emergency Medicine Physician1407946197
- Michele Adams, RNRegistered Nurse1851242572
- Drew Albright, D.O.Surgery Physician1578944633
- Corrie Alonzo, M.D.Neonatal-Perinatal Medicine Physician1073956033
- Amanda Alpert, RNRegistered Nurse1861086936
- Ainsley Anderson, M.D.Emergency Medicine Physician1558756569
Verify Mark A. Chidel in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 40739Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
35% fewer Medicare Part D claims than the average radiation oncology physician in 2024
87 Medicare Part D claims for 33 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D.
Most prescribed
- Tamsulosin Hcl21 claims
- Memantine Hcl14 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 2 group practices
- Colorado Permanente Medical Group PCDenver, CO
- Intermountain Medical Group Denver LLCLafayette, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark A. Chidel among 111 radiation oncology physician records in Colorado
Mark A. Chidel, MD is one of 111 radiation oncology physician records with a practice address in Colorado. 86% 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 42% of them.
- NPI issued2007 · 42% of these records are older, 44% newer
- In a Medicare fileYes · 86% of these records are
- In the CMS Doctors and Clinicians fileYes · 79% of these records are
- Graduated1995 · median 2007 among the 88 with a school on file
- Record last updated2021 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in Colorado
There are 111 radiation oncology physician records in Colorado.
All 111 in Colorado → Every provider in Denver → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Ari Ballonoff, MDDenver, CO 802181689720260
- Christopher Deig, M.D.Denver, CO 802181043743883
- Kathryn Howell, MDDenver, CO 802181811971542
- James Jacobs, MDDenver, CO 802181861619173
- Michelle Klem, M.D.Denver, CO 802181790989556
- Brandon Patton, MDDenver, CO 802181659572758
- Narine Wandrey, MDDenver, CO 802181437654332
- Andrzej Wojcieszynski, MDDenver, CO 802181316203003
Common questions
What is Mark A. Chidel, MD's NPI number?
Mark A. Chidel, MD's National Provider Identifier (NPI) is 1780711366, issued on Feb 28, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Mark A. Chidel, MD located?
The NPPES record lists a practice address at 1375 E 19TH Ave, Denver, CO, 80218. Phone: (303) 338-4545. Providers update this record themselves, so call before visiting.
How can I verify Mark A. Chidel, MD's license?
NPPES lists Colorado license number 40739, 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 Mark A. Chidel, MD prescribe under Medicare Part D?
In 2024, Mark A. Chidel, MD had 87 Medicare Part D claims for 33 beneficiaries; the average among radiation oncology physician prescribers was 134. 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.