NPPES file of Aug 9, 2026

Heather Markham, PMHNP

Psychiatric/Mental Health Nurse Practitioner · Littleton, CO

Heather Markham, PMHNP is a psychiatric/mental health nurse practitioner with a practice address in Littleton, Colorado, and NPI 1306651047, issued on Feb 10, 2025. Check the license (Colorado 1000475, as entered in NPPES) with the Colorado board that licenses this profession; the Medicare figures below come from public CMS files.

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

NPPES recordNPPES file of Aug 9, 2026
1306651047
Name
Heather Markham
Credential
PMHNP
Primary taxonomy
Psychiatric/Mental Health Nurse Practitioner 363LP0808X
License number
1000475 CO
Self-reported in NPPES; status is on the state search
Practice location
6507 S Santa FE Dr, Littleton, CO 80120
Phone
(303) 730-8858
Enumerated
Feb 10, 2025
Record last updated
Feb 17, 2025
Medicare enrollment
Enrolled (PECOS I20250317000307); accepts Medicare assignment
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest psychiatric/mental health nurse practitioner records → All 1,336 in Colorado → Look up another NPI →

Also registered at 6507 S Santa FE Dr

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

  1. Malia Addison, MDPsychiatry Physician1043871320
  2. Ona Ahumada, NPNurse Practitioner1790074763
  3. Theodore Anfinson, M.D.Psychiatry Physician1992838718
  4. Valarie Barros, LPC, LACProfessional Counselor1750983250
  5. Heather BentonProfessional Counselor1447892740
  6. Jordan BierbrauerClinical Social Worker1811569866

Verify Heather Markham 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 1000475    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

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Chriesl Infusion Centers LLCAurora, CO

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Heather Markham among 1,336 psychiatric/mental health nurse practitioner records in Colorado

Heather Markham, PMHNP is one of 1,336 psychiatric/mental health nurse practitioner records with a practice address in Colorado. 70% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2025, is newer than 83% of them.

  • NPI issued2025 · 83% of these records are older, 6% newer
  • In a Medicare fileYes · 70% of these records are
  • In the CMS Doctors and Clinicians fileYes · 55% of these records are
  • Graduated2024 · median 2021 among the 730 with a school on file
  • Record last updated2025 · 18% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LP0808X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

61 psychiatric/mental health nurse practitioner records list a practice address in Littleton

They are 61 of the 3,918 NPPES records with a practice address in Littleton, and 1,336 psychiatric/mental health nurse practitioner records in Colorado.

All 1,336 in Colorado → Every provider in Littleton → Psychiatric/Mental Health Nurse Practitioner nationwide →

The 8 psychiatric/mental health nurse practitioner records with the nearest ZIP codes

  1. Holly Ellis-Ponomarev, RN, BSN, PMHNP-BCLittleton, CO 801201437500097
  2. Carla Farris, CFNPLittleton, CO 801201881845881
  3. Donna KenneyLittleton, CO 801201578707790
  4. Timberly KlinestiverLittleton, CO 801201245566256
  5. Ramona Logue, RNLittleton, CO 801201316485030
  6. Amanda Matz, DNPLittleton, CO 801201346667441
  7. Chelsie Monroe, APNLittleton, CO 801201104235761
  8. Esther Okanlawon, NP-CLittleton, CO 801201073917035

Common questions

What is Heather Markham, PMHNP's NPI number?

Heather Markham, PMHNP's National Provider Identifier (NPI) is 1306651047, issued on Feb 10, 2025. An NPI identifies a provider in billing; it is not a license.

Where is Heather Markham, PMHNP located?

The NPPES record lists a practice address at 6507 S Santa FE Dr, Littleton, CO, 80120. Phone: (303) 730-8858. Providers update this record themselves, so call before visiting.

How can I verify Heather Markham, PMHNP's license?

NPPES lists Colorado license number 1000475, 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. Medicare files from data.cms.gov. 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.