Pia A. Ong, MD

Medicare activity in 2024

Official CMS public-use data for Pia A. Ong, 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.

Most frequent services

1. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)250 services
2. Critical care, first 30-74 minutes (99291)69 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%
• Arthritis67%
• Chronic kidney disease50%
• Diabetes49%
• Heart failure49%

Hospitals where Pia A. Ong works

Medicare's Facility Affiliation Data lists Pia A. Ong 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.

• OSF Saint Elizabeth MDL CenterPeru, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140110
• OSF Saint Katharine Medical CenterDixon, IL · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 140012
• OSF Saint Paul Medical CenterMendota, IL · Critical Access Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 141310
• Rochelle Community HospitalRochelle, IL · Critical Access Hospital · Emergency services: listed by Medicare · CCN 141312
• Saint Anthony Medical CenterRockford, IL · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 140233

Practice locations

Addresses where Pia A. Ong is enrolled with Medicare (CMS data updated October 2, 2026).

• 5666 E State StRockford, IL 61108 (815) 921‑8929
• 8600 State Route 91, Suite 130Peoria, IL 61615 (309) 683‑5050

Group practices

Medicare enrollment lists Pia A. Ong as a member of this group (CMS data updated October 2, 2026).

• OSF Multi-Specialty Group2,114 clinicians in the group

Specialties

• Hospitalistprimary
• Internal Medicinealso

Find other Hospitalist doctors in Illinois →

Other hospitalists in Rockford

Clinicians with the same Medicare primary specialty in Rockford, IL — not a recommendation.

• Eugene K. Vortia, MD
• Christine B. Ward, MD
• Mohammad A. Moiz, MD
• Huma Khan, MD
• Gautham A. Oroskar, MD
• Shazia P. Khatoon, MD
• Ravi Mohan, MD
• Thomas J. Brefeld, MD

All hospitalists in Rockford →

Other clinicians in OSF Multi-Specialty Group

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

• Daniel K. Chan, MD
• Viviane M. Santos
• Theresa Kircher, CSW
• Kayla M. Adams
• Waseem Ahmad, MD
• Alpa M. Patel, MD

Clinician information

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