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Internal Medicine

Antonio G. Topacio, MD

Works at hospitals in Orange, CA · Anaheim, CA · California

Summary

Dr. Antonio G. Topacio, MD is an internal medicine doctor at 4955 Van Nuys Blvd, Suite 308, Sherman Oaks, CA 91403. Phone: (818) 528-1260. Accepts Medicare assignment. In 2024, Antonio G. Topacio had 397 Original Medicare patients and 1,878 services. NPI 1518225325. 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: Internal medicine doctor (Medicare lists Internal Medicine)
  • Address: 4955 Van Nuys Blvd, Suite 308, Sherman Oaks, CA 91403 · Directions
  • Phone: (818) 528‑1260
  • Medicare: Accepts Medicare assignment
  • Hospitals: UCI Health-Orange, West Anaheim Medical Center
  • Group practice: Epic Medical Group, Inc
  • Medical school: graduated 2012 (14 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Antonio G. Topacio, 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 Antonio G. Topacio accept Medicare assignment?
Yes. Medicare's clinician data says Antonio G. Topacio 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 Antonio G. Topacio see?
In 2024, CMS data shows 397 Original Medicare patients and 1,878 services for Antonio G. Topacio. This counts Original Medicare only and measures volume, not quality.
What is Antonio G. Topacio's NPI number?
1518225325. 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 Antonio G. Topacio, 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 patients397
Services billed to Medicare1,878
Different services or procedures19
Participating Medicare providerYes
Average age of these patients75

Most frequent services

  1. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)488 services
  2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)337 services
  3. Hospital discharge day management, more than 30 minutes (99239)287 services
  4. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)269 services
  5. Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)115 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 cholesterol75%
  • Diabetes60%
  • Chronic kidney disease60%
  • Ischemic heart disease57%
  • Arthritis56%

Hospitals where Antonio G. Topacio works

Medicare's Facility Affiliation Data lists Antonio G. Topacio 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.

  • UCI Health-OrangeOrange, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050348
  • West Anaheim Medical CenterAnaheim, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050426

Practice locations

Addresses where Antonio G. Topacio is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Antonio G. Topacio as a member of this group (CMS data updated October 2, 2026).

  • Epic Medical Group, Inc59 clinicians in the group

Specialties

Find other Internal Medicine doctors in California →

Other internal medicine doctors in Sherman Oaks

Clinicians with the same Medicare primary specialty in Sherman Oaks, CA — not a recommendation.

All internal medicine doctors in Sherman Oaks →

Other clinicians in Epic Medical Group, Inc

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

Clinician information

CredentialMD
Graduation year2012 (14 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1518225325
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