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Internal Medicine

Clive L. Alonzo, MD

Works at hospitals in Gary, IN · Indiana

Summary

Dr. Clive L. Alonzo, MD is an internal medicine doctor at 5215 Holy Cross Pkwy, Mishawaka, IN 46545. Phone: (574) 335-5000. Accepts Medicare assignment. In 2024, Clive L. Alonzo had 136 Original Medicare patients and 358 services. NPI 1134190721. 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: 5215 Holy Cross Pkwy, Mishawaka, IN 46545 · Directions (1 more location)
  • Phone: (574) 335‑5000
  • Medicare: Accepts Medicare assignment
  • Hospital: Methodist Hospitals Inc
  • Group practice: Sound Physicians of Indiana LLC
  • Medical school: Meharry Medical College School Of Medicine · graduated 2002 (24 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Clive L. Alonzo, 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 Clive L. Alonzo accept Medicare assignment?
Yes. Medicare's clinician data says Clive L. Alonzo 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 Clive L. Alonzo see?
In 2024, CMS data shows 136 Original Medicare patients and 358 services for Clive L. Alonzo. This counts Original Medicare only and measures volume, not quality.
What is Clive L. Alonzo's NPI number?
1134190721. 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 Clive L. Alonzo, 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 patients136
Services billed to Medicare358
Different services or procedures7
Participating Medicare providerYes
Average age of these patients71

Most frequent services

  1. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)148 services
  2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)92 services
  3. Critical care, first 30-74 minutes (99291)34 services
  4. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)33 services
  5. Hospital discharge day management, more than 30 minutes (99239)26 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 cholesterol71%
  • Heart failure60%
  • Diabetes57%
  • COPD57%
  • Chronic kidney disease51%

Hospitals where Clive L. Alonzo works

Medicare's Facility Affiliation Data lists Clive L. Alonzo 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.

  • Methodist Hospitals IncGary, IN · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 150002

Practice locations

Addresses where Clive L. Alonzo is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Clive L. Alonzo as a member of this group (CMS data updated October 2, 2026).

  • Sound Physicians of Indiana LLC78 clinicians in the group

Specialties

Find other Internal Medicine doctors in Indiana →

Other internal medicine doctors in Mishawaka

Clinicians with the same Medicare primary specialty in Mishawaka, IN — not a recommendation.

All internal medicine doctors in Mishawaka →

Other clinicians in Sound Physicians of Indiana LLC

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

Clinician information

CredentialMD
Medical schoolMeharry Medical College School Of Medicine
Graduation year2002 (24 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1134190721
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