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Colorectal Surgery (Proctology)

Ronald Gagliano, MD

Works at hospitals in Phoenix, AZ · Arizona

Summary

Dr. Ronald Gagliano, MD is a colorectal surgeon at 500 W Thomas Rd, 400 Dhmg St. Joseph'S Surgical Specialty, Phoenix, AZ 85013. Phone: (602) 406-3874. Accepts Medicare assignment. In 2024, Ronald Gagliano had 38 Original Medicare patients and 96 services. NPI 1043296460. 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: Colorectal surgeon (Medicare lists Colorectal Surgery (Proctology))
  • Address: 500 W Thomas Rd, 400 Dhmg St. Joseph'S Surgical Specialty, Phoenix, AZ 85013 · Directions (1 more location)
  • Phone: (602) 406‑3874
  • Medicare: Accepts Medicare assignment
  • Hospital: St Josephs Hospital and Medical Center
  • Group practice: SJHMC Physician Services
  • Medical school: Tulane University School Of Medicine · graduated 1994 (32 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Ronald Gagliano, 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 Ronald Gagliano accept Medicare assignment?
Yes. Medicare's clinician data says Ronald Gagliano 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 Ronald Gagliano see?
In 2024, CMS data shows 38 Original Medicare patients and 96 services for Ronald Gagliano. This counts Original Medicare only and measures volume, not quality.
What is Ronald Gagliano's NPI number?
1043296460. 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 Ronald Gagliano, 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 patients38
Services billed to Medicare96
Different services or procedures27
Participating Medicare providerYes
Average age of these patients71

Most frequent services

  1. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)13 services
  2. Diagnostic exam of anus using an endoscope (46600)12 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 cholesterol75%
  • High blood pressure66%
  • Arthritis50%
  • Ischemic heart disease39%
  • Chronic kidney disease39%
  • Diabetes37%

Hospitals where Ronald Gagliano works

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

Group practices

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

  • SJHMC Physician Services646 clinicians in the group

Specialties

Find other Colorectal Surgery (Proctology) doctors in Arizona →

Other colorectal surgeons in Phoenix

Clinicians with the same Medicare primary specialty in Phoenix, AZ — not a recommendation.

All colorectal surgeons in Phoenix →

Other clinicians in SJHMC Physician Services

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

Clinician information

CredentialMD
Medical schoolTulane University School Of Medicine
Graduation year1994 (32 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1043296460
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