NPPES file of Aug 9, 2026

Mark G. Leifeste, M.D.

Specialist · Boulder, CO

Mark G. Leifeste, M.D. is a specialist with a practice address in Boulder, Colorado, and NPI 1033156427, issued on Jun 2, 2006. Check the license (Colorado 23486, as entered in NPPES) with the Colorado board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1033156427
Name
Mark G. Leifeste
Credential
M.D.
Primary taxonomy
Specialist 174400000X
License number
23486 CO
Self-reported in NPPES; status is on the state search
Practice location
4770 Baseline RD, Boulder, CO 80303
Phone
(303) 449-6577
Enumerated
Jun 2, 2006
Record last updated
Jul 13, 2026
Fax
(303) 447-1880
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest specialist records → All 1,105 in Colorado → Look up another NPI →

Also registered at 4770 Baseline RD

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Karin Johnson, LPCMental Health Counselor1396959219
  2. Eve Kilmer, PHDPsychologist1184645202
  3. Karen McCarthy, PH.D.Psychologist1033109962
  4. John Morris, MDPsychiatry Physician1851314603
  5. Lisa Morrison, ARNPPsychiatric/Mental Health Nurse Practitioner1386667137
  6. Dolores MuzerProfessional Counselor1306308945

Verify Mark G. Leifeste in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Colorado board licenses this profession
    Search for license 23486    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Colorado license search

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Mark G. Leifeste among 1,105 specialist records in Colorado

Mark G. Leifeste, M.D. is one of 1,105 specialist records with a practice address in Colorado. 12% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 4% of them.

  • NPI issued2006 · 4% of these records are older, 76% newer
  • In a Medicare fileNo · 12% of these records are
  • In the CMS Doctors and Clinicians fileNo · 8% of these records are
  • Record last updated2026 · 89% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Specialist providers in Colorado

There are 1,105 specialist records in Colorado. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 1,105 in Colorado → Every provider in Boulder → Specialist nationwide →

The 8 specialist records with the nearest ZIP codes

  1. Craig Beyer, DOBoulder, CO 803031831283415
  2. Jill Blomer, MEDICAL RECEPTIONISTBoulder, CO 803031174739635
  3. Erin Chlumsky, CMT, RYTBoulder, CO 803031790068070
  4. James Clark, MDBoulder, CO 803031902908593
  5. Christina Green, MABoulder, CO 803031972831097
  6. Karen HontzBoulder, CO 803031316148422
  7. Sameh Melouk, MDBoulder, CO 803031841392487
  8. Jonathan Oldham, PTBoulder, CO 803031437332764

Common questions

What is Mark G. Leifeste, M.D.'s NPI number?

Mark G. Leifeste, M.D.'s National Provider Identifier (NPI) is 1033156427, issued on Jun 2, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Mark G. Leifeste, M.D. located?

The NPPES record lists a practice address at 4770 Baseline RD, Boulder, CO, 80303. Phone: (303) 449-6577. Providers update this record themselves, so call before visiting.

How can I verify Mark G. Leifeste, M.D.'s license?

NPPES lists Colorado license number 23486, as entered by the provider. Search the Colorado board that licenses this profession; the NPPES record confirms identity 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. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.