Mark Holley, M.D.
NPI 1588673107 · Emergency Medical Services (Emergency Medicine) Physician · Denver, CO
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Holley, M.D. is a Emergency Medical Services (Emergency Medicine) Physician provider in Denver, CO (NPI 1588673107).
Provider details
- NPI number
- 1588673107
- Entity type
- Individual
- Primary specialty
- Emergency Medical Services (Emergency Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 36330 (CO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
170 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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 does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 37 | $131 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 32 | $94 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 25 | $106 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 23 | $166 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 15 | $188 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 4 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Doxycycline Hyclate | 27 | 26 |
| Cephalexin | 26 | 26 |
| Cefuroxime Axetilbrand: Cefuroxime | 21 | 21 |
| Prednisone | 13 | 13 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude 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 no Part D record, 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
Additional practice locations (1)
- 1400 Jackson StDenver, CO 80206Phone: (303) 388-4461Fax: (303) 398-1211
Registry dates
- Enumerated
- 2006-08-05
- Last updated
- 2021-04-30
- Certified
- 2021-04-30
Frequently asked questions
- What is Mark Holley's NPI number?
- Mark Holley's National Provider Identifier (NPI) is 1588673107, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Holley's specialty?
- Mark Holley is listed in the NPPES registry with a primary specialty of Emergency Medical Services (Emergency Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Holley located?
- Mark Holley's practice location on file with NPPES is 2227 West 35th Ave., Denver, CO 80211.
- What is Mark Holley's phone number?
- The practice phone number listed in the NPPES registry for Mark Holley is (303) 455-0815.
- Does Mark Holley accept Medicare?
- Mark Holley is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Holley's NPI active?
- Yes — Mark Holley's NPI (1588673107) is active in the NPPES registry as of the last update on 2021-04-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.