Mark Huun, M.D.
NPI 1366579245 · Internal Medicine Physician · Denver, CO
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Huun, M.D. is a Internal Medicine Physician provider in Denver, CO (NPI 1366579245).
Provider details
- NPI number
- 1366579245
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 30960 (CO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 88 | 82 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 41 | 40 |
| Cephalexin | 25 | 25 |
| Doxycycline Hyclate | 20 | 20 |
| Amlodipine Besylate | 13 | — |
| Fluconazole | 11 | 11 |
| Methylprednisolone | 11 | 11 |
These counts cover prescriptions paid through Medicare Part D in 2024 — they include cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-02-27
- Last updated
- 2012-11-19
Frequently asked questions
- What is Mark Huun's NPI number?
- Mark Huun's National Provider Identifier (NPI) is 1366579245, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Huun's specialty?
- Mark Huun is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Huun located?
- Mark Huun's practice location on file with NPPES is 1515 Wazee St, Denver, CO 80202-1478.
- What is Mark Huun's phone number?
- The practice phone number listed in the NPPES registry for Mark Huun is (303) 534-9550.
- Does Mark Huun accept Medicare?
- Mark Huun is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Huun's NPI active?
- Yes — Mark Huun's NPI (1366579245) is active in the NPPES registry as of the last update on 2012-11-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.