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Emergency Medicine

Janetta L. Iwanicki, MD

Works at hospitals in Denver, CO · Colorado

Summary

Dr. Janetta L. Iwanicki, MD is an emergency medicine doctor at 777 Bannock St, Denver, CO 80204. Phone: (303) 436-6000. Accepts Medicare assignment. In 2024, Janetta L. Iwanicki had 54 Original Medicare patients and 67 services. NPI 1649437393. 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: 777 Bannock St, Denver, CO 80204 · Directions
  • Phone: (303) 436‑6000
  • Medicare: Accepts Medicare assignment
  • Hospital: Denver Health & Hospital Authority
  • Group practice: Denver Health and Hospital Authority
  • Medical school: University Of California, San Francisco School Of Medicine · graduated 2008 (18 years since medical school)
  • Gender (as listed): Female

From official Medicare data

This page shows what Medicare's official clinician data says about Janetta L. Iwanicki, 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 Janetta L. Iwanicki accept Medicare assignment?
Yes. Medicare's clinician data says Janetta L. Iwanicki 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 Janetta L. Iwanicki see?
In 2024, CMS data shows 54 Original Medicare patients and 67 services for Janetta L. Iwanicki. This counts Original Medicare only and measures volume, not quality.
What is Janetta L. Iwanicki's NPI number?
1649437393. 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 Janetta L. Iwanicki, 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 patients54
Services billed to Medicare67
Different services or procedures11
Participating Medicare providerYes
Average age of these patients62

Most frequent services

  1. Emergency department visit with high level of medical decision making (99285)28 services
  2. Emergency department visit with moderate level of medical decision making (99284)19 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 blood pressure65%
  • Anxiety48%
  • High cholesterol39%
  • Depression37%
  • Arthritis31%
  • Chronic kidney disease30%

Hospitals where Janetta L. Iwanicki works

Medicare's Facility Affiliation Data lists Janetta L. Iwanicki 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.

Practice locations

Addresses where Janetta L. Iwanicki is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Janetta L. Iwanicki as a member of this group (CMS data updated October 2, 2026).

  • Denver Health and Hospital Authority849 clinicians in the group

Specialties

Find other Emergency Medicine doctors in Colorado →

Other emergency medicine doctors in Denver

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

All emergency medicine doctors in Denver →

Other clinicians in Denver Health and Hospital Authority

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

Clinician information

CredentialMD
Medical schoolUniversity Of California, San Francisco School Of Medicine
Graduation year2008 (18 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1649437393
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