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Allergy/Immunology

Kanao Otsu, MD

Works at hospitals in Boulder, CO · Denver, CO · Colorado

Summary

Dr. Kanao Otsu, MD is an allergist and immunologist at 1400 Jackson St, Denver, CO 80206. Phone: (303) 398-1355. Accepts Medicare assignment. In 2024, Kanao Otsu had 170 Original Medicare patients and 263 services. NPI 1881748226. 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: Allergist and immunologist (Medicare lists Allergy/Immunology)
  • Address: 1400 Jackson St, Denver, CO 80206 · Directions
  • Phone: (303) 398‑1355
  • Medicare: Accepts Medicare assignment
  • Hospitals: Boulder Community Health, National Jewish Health
  • Group practice: National Jewish Health
  • Medical school: Columbia University College Of Physicians And Surgeons · graduated 2003 (23 years since medical school)
  • Gender (as listed): Female
  • Telehealth: offered

From official Medicare data

This page shows what Medicare's official clinician data says about Kanao Otsu, 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 Kanao Otsu accept Medicare assignment?
Yes. Medicare's clinician data says Kanao Otsu 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 Kanao Otsu see?
In 2024, CMS data shows 170 Original Medicare patients and 263 services for Kanao Otsu. This counts Original Medicare only and measures volume, not quality.
What is Kanao Otsu's NPI number?
1881748226. 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 Kanao Otsu, 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 patients170
Services billed to Medicare263
Different services or procedures10
Participating Medicare providerYes
Average age of these patients70

Most frequent services

  1. New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)99 services
  2. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)50 services
  3. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)21 services
  4. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)19 services
  5. Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)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 cholesterol68%
  • Asthma61%
  • Arthritis58%
  • COPD55%
  • High blood pressure54%
  • Ischemic heart disease30%

Hospitals where Kanao Otsu works

Medicare's Facility Affiliation Data lists Kanao Otsu 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 Kanao Otsu is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Kanao Otsu as a member of this group (CMS data updated October 2, 2026).

  • National Jewish Health247 clinicians in the group

Specialties

Find other Allergy/Immunology doctors in Colorado →

Other allergist and immunologists in Denver

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

All allergist and immunologists 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)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1881748226
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