Clifford Howard Siegel, MD
Psychiatry Physician · Greenwood Village, CO
Clifford Howard Siegel, MD is a psychiatry physician with a practice address in Greenwood Village, Colorado, and NPI 1427143239, issued on Oct 4, 2006. Check the license (Colorado 22035, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Clifford Howard Siegel
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 22035 CO
Self-reported in NPPES; status is on the state search - Practice location
- 7000 E Belleview Ave Ste 203, Greenwood Village, CO 80111
- Phone
- (303) 671-8700
- Enumerated
- Oct 4, 2006
- Record last updated
- Oct 7, 2022
- Fax
- (720) 480-3822
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 990 in Colorado → Look up another NPI →
Also registered at 7000 E Belleview Ave Ste 203
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Bonnie Mucklow, LPC, LMFT, CAC IIIMarriage & Family Therapist1528082179
Verify Clifford Howard Siegel in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 22035Check 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 psychiatry physician in 2024
17 Medicare Part D claims, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% 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.
Clifford Howard Siegel among 990 psychiatry physician records in Colorado
Clifford Howard Siegel, MD is one of 990 psychiatry physician records with a practice address in Colorado. 65% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 62% newer
- In a Medicare fileYes · 65% of these records are
- In the CMS Doctors and Clinicians fileNo · 35% of these records are
- Record last updated2022 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatry Physician providers in Colorado
There are 990 psychiatry physician records in Colorado.
All 990 in Colorado → Every provider in Greenwood Village → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Barbara Dutmers, MDGreenwood Village, CO 801111861552739
- Steven Dworetsky, M.DGreenwood Village, CO 801111871646257
- Howard Entin, M.D.Centennial, CO 801111679918882
- Gershom Hernandez, M.D.Greenwood Village, CO 801111679927818
- Daniel Hoffman, MDGreenwood Village, CO 801111942282058
- David Lyons, M.D.Englewood, CO 801111851458673
- Douglas Newton, MDGreenwood Village, CO 801111184727356
- Richard Rewey, MDEnglewood, CO 801111548311822
Common questions
What is Clifford Howard Siegel, MD's NPI number?
Clifford Howard Siegel, MD's National Provider Identifier (NPI) is 1427143239, issued on Oct 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Clifford Howard Siegel, MD located?
The NPPES record lists a practice address at 7000 E Belleview Ave Ste 203, Greenwood Village, CO, 80111. Phone: (303) 671-8700. Providers update this record themselves, so call before visiting.
How can I verify Clifford Howard Siegel, MD's license?
NPPES lists Colorado license number 22035, 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 Clifford Howard Siegel, MD prescribe under Medicare Part D?
In 2024, Clifford Howard Siegel, MD had 17 Medicare Part D claims; the average among psychiatry physician prescribers was 1,000. 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.