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

Diagnostic Radiology

Kenneth S. Allison Jr., MD

Works at hospitals in Littleton, CO · Parker, CO · Englewood, CO … · Colorado, Hawaii

Summary

Dr. Kenneth S. Allison Jr., MD is a radiologist at 1400 Jackson St, Denver, CO 80206. Phone: (303) 398-1355. Accepts Medicare assignment. In 2024, Kenneth S. Allison Jr. had 1,490 Original Medicare patients and 3,386 services. NPI 1134398365. 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.

From official Medicare data

This page shows what Medicare's official clinician data says about Kenneth S. Allison Jr., 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 Kenneth S. Allison Jr. accept Medicare assignment?
Yes. Medicare's clinician data says Kenneth S. Allison Jr. 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 Kenneth S. Allison Jr. see?
In 2024, CMS data shows 1,490 Original Medicare patients and 3,386 services for Kenneth S. Allison Jr.. This counts Original Medicare only and measures volume, not quality.
What is Kenneth S. Allison Jr.'s NPI number?
1134398365. 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 Kenneth S. Allison Jr., 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 patients1,490
Services billed to Medicare3,386
Different services or procedures48
Participating Medicare providerYes
Average age of these patients76

Most frequent services

  1. Ct scan head or brain without contrast (70450)820 services
  2. Ct scan of upper spine without contrast (72125)375 services
  3. Ct scan of blood vessels of head with contrast (70496)215 services
  4. Ct scan of blood vessels of neck with contrast (70498)209 services
  5. Mri scan of brain without contrast (70551)162 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 pressure75%
  • High cholesterol74%
  • Arthritis58%
  • Depression38%
  • Chronic kidney disease36%
  • Stroke or mini-stroke34%

Hospitals where Kenneth S. Allison Jr. works

Medicare's Facility Affiliation Data lists Kenneth S. Allison Jr. 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 Kenneth S. Allison Jr. is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 6; the Medicare profile lists all.

Group practices

Medicare enrollment lists Kenneth S. Allison Jr. as a member of these groups (CMS data updated October 2, 2026).

  • National Jewish Health247 clinicians in the group
  • Radiology Imaging Associates PC149 clinicians in the group
  • Medical Imaging of Colorado Radiology Imaging Assc PC Etal PT127 clinicians in the group
  • Hawaii Radiologic Associates Ltd89 clinicians in the group

Specialties

Find other Diagnostic Radiology doctors in Colorado →

Other radiologists in Denver

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

All radiologists in Denver →

Other clinicians in National Jewish Health

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

Clinician information

CredentialMD
Medical schoolColumbia University College Of Physicians And Surgeons
Graduation year2003 (23 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1134398365
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