NPPES file of Aug 9, 2026

Allergy & Immunology (Internal Medicine) Physician in Colorado

12 NPPES records list allergy & immunology (internal medicine) physician with a practice address in Colorado, 0.2 per 100,000 residents, the 12th highest rate of 47. Aurora and Lakewood have the most; each record links to the provider's NPI and the Colorado license search.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207RA0201X · method

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Aurora has the most, 5

  1. Aurora5
  2. Lakewood2
  3. Colorado Springs1
  4. Durango1
  5. Lone Tree1

Allergy & Immunology (Internal Medicine) Physician records in Colorado

  1. Allen Adinoff, MDAurora, CO 800451386614691
  2. Jason Catanzaro, M.D.Lone Tree, CO 801241780845768
  3. W Donald Cooke, MDDurango, CO 813011558437681
  4. Stephen Dreskin, MDAurora, CO 800451457441131
  5. Andrew Fontenot, MDAurora, CO 800451962592642
  6. Richard Luzietti, M.D.Aurora, CO 800121336293745
  7. Robert Nathan, MDColorado Springs, CO 809071487648077
  8. Kevin O'Brien, M.D.Thornton, CO 802331134131733
  9. Robert Pace, MDLongmont, CO 805011861404220
  10. Snehal Patel, D.OLakewood, CO 804011275897001
  11. Paul Schkade, MDLakewood, CO 804011306865498
  12. Jenny StittAurora, CO 800451215101019

Source: CMS NPPES, primary taxonomy 207RA0201X: records by practice city and the list of records, file of Aug 9, 2026.

Colorado ranks 12 of 47 per resident

  1. North Dakota0.3
  2. Connecticut0.2
  3. California0.2
  4. Colorado0.2
  5. Arkansas0.2
  6. Iowa0.2
  7. 50 states and D.C.0.2

Source: CMS NPPES, primary taxonomy 207RA0201X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

50.0% of these records appear in a Medicare file, against 78.6% nationally

A Medicare file here is Part D prescribing (2024), a MIPS score (2023), an Open Payments record (2024) or Medicare group billing (CMS Doctors and Clinicians). A record outside them may still see patients: these files cover Medicare only.

  1. Colorado50.0%
  2. United States78.6%

Allergy & Immunology (Internal Medicine) Physician records in Colorado, measured

  • In a Medicare file6 of 12 · 50.0% here, 78.6% nationally
  • In the CMS Doctors and Clinicians file4 · 33.3% here, 64.0% nationally
  • Not updated in five years or more6 · 50.0% here, 51.0% nationally

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207RA0201X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

12 NPPES records list allergy & immunology (internal medicine) physician (207RA0201X) as their primary taxonomy with a practice address in Colorado: 0.2 per 100,000 residents against 0.2 nationally (50 states and D.C.). Aurora has 5 of them (42%).

A record is a registration a provider made and keeps up to date: it shows neither that the provider is licensed nor that they still practice there. The state's own license search is the check.

States with a similar number

  1. Washington12
  2. Georgia11
  3. Ohio11
  4. Michigan16

States with a similar rate per 100,000

  1. California0.2
  2. Virginia0.2
  3. Illinois0.2
  4. New Jersey0.2

The largest states

  1. California81
  2. New York61
  3. Texas50
  4. Maryland30
  5. Missouri28

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy; 2023 Census population estimates. A registry record is not a license.

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.