Medical emergency?Emergency? Call 911. Nearest emergency roomsNearest ERs

Emergency Medicine

Justin S. McLean, MD

Works at hospitals in Boulder, CO · Colorado

Summary

Dr. Justin S. McLean, MD is an emergency medicine doctor at 1000 W S Boulder Rd, Lafayette, CO 80026. Phone: (303) 666-4357. Accepts Medicare assignment. In 2024, Justin S. McLean had 541 Original Medicare patients and 901 services. NPI 1154688505. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: Emergency medicine doctor (Medicare lists Emergency Medicine)
  • Address: 1000 W S Boulder Rd, Lafayette, CO 80026 · Directions (1 more location)
  • Phone: (303) 666‑4357
  • Medicare: Accepts Medicare assignment
  • Hospital: Boulder Community Health
  • Group practice: Boulder Emergency Physicians P.C.
  • Medical school: graduated 2012 (14 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Justin S. McLean, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Justin S. McLean accept Medicare assignment?
Yes. Medicare's clinician data says Justin S. McLean accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does Justin S. McLean see?
In 2024, CMS data shows 541 Original Medicare patients and 901 services for Justin S. McLean. This counts Original Medicare only and measures volume, not quality.
What is Justin S. McLean's NPI number?
1154688505. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Justin S. McLean, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients541
Services billed to Medicare901
Different services or procedures30
Participating Medicare providerYes
Average age of these patients76

Most frequent services

  1. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)315 services
  2. Emergency department visit with high level of medical decision making (99285)278 services
  3. Emergency department visit with moderate level of medical decision making (99284)154 services
  4. Critical care, first 30-74 minutes (99291)97 services
  5. Emergency department visit with low level of medical decision making (99283)18 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High cholesterol70%
  • High blood pressure68%
  • Arthritis49%
  • Ischemic heart disease42%
  • Anxiety37%
  • Depression31%

Hospitals where Justin S. McLean works

Medicare's Facility Affiliation Data lists Justin S. McLean at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

  • Boulder Community HealthBoulder, CO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 060027

Practice locations

Addresses where Justin S. McLean is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Justin S. McLean as a member of this group (CMS data updated October 2, 2026).

  • Boulder Emergency Physicians P.C.10 clinicians in the group

Specialties

Find other Emergency Medicine doctors in Colorado →

Other emergency medicine doctors in Lafayette

Clinicians with the same Medicare primary specialty in Lafayette, CO — not a recommendation.

All emergency medicine doctors in Lafayette →

Other clinicians in Boulder Emergency Physicians P.C.

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Graduation year2012 (14 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1154688505
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians