NPPES file of Aug 9, 2026

Gastroenterology Physician in Arizona

403 NPPES records list gastroenterology physician with a practice address in Arizona, 5.4 per 100,000 residents, the 27th highest rate of 51. Scottsdale and Phoenix have the most; each record links to the provider's NPI and the Arizona license search. Page 9 of 9.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207RG0100X · method

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

Scottsdale has the most, 107

  1. Scottsdale107
  2. Phoenix70
  3. Tucson60
  4. Mesa39
  5. Chandler30

Gastroenterology Physician records in Arizona

  1. Steven Zierer, M.D.Mesa, AZ 852061366437337
  2. Norman Zitomer, M.D.Scottsdale, AZ 852551669447132
  3. Nadim Zyadeh, MDPhoenix, AZ 850151609877935

Source: CMS NPPES, primary taxonomy 207RG0100X: records by practice city and the list of records, file of Aug 9, 2026.

Arizona ranks 27 of 51 per resident

  1. South Carolina5.6
  2. California5.5
  3. Michigan5.5
  4. Arizona5.4
  5. Indiana5.4
  6. Vermont5.4
  7. 50 states and D.C.6.2

Source: CMS NPPES, primary taxonomy 207RG0100X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

84.4% of these records appear in a Medicare file, against 84.4% 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. Arizona84.4%
  2. United States84.4%

Gastroenterology Physician records in Arizona, measured

  • In a Medicare file340 of 403 · 84.4% here, 84.4% nationally
  • In the CMS Doctors and Clinicians file295 · 73.2% here, 73.7% nationally
  • Not updated in five years or more190 · 47.1% here, 55.6% nationally
  • Median graduation year2001 · the 295 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207RG0100X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

403 NPPES records list gastroenterology physician (207RG0100X) as their primary taxonomy with a practice address in Arizona: 5.4 per 100,000 residents against 6.2 nationally (50 states and D.C.). Scottsdale has 107 of them (27%).

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. Missouri414
  2. Tennessee384
  3. Indiana372
  4. Minnesota457

States with a similar rate per 100,000

  1. Vermont5.4
  2. Michigan5.5
  3. California5.5
  4. South Dakota5.3

The largest states

  1. California2,140
  2. New York1,797
  3. Florida1,513
  4. Texas1,478
  5. Pennsylvania1,049

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.