Howard K. O Neil, MD

Medicare activity in 2024

Official CMS public-use data for Howard K. O Neil, 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. X-ray of chest, 1 view (71045)368 services
2. X-ray of chest, 2 views (71046)194 services
3. Ct scan head or brain without contrast (70450)178 services
4. Dxa bone density measurement of hip, pelvis, spine (77080)177 services
5. Ct scan of abdomen and pelvis with contrast (74177)84 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%
• Arthritis64%
• Ischemic heart disease41%
• Diabetes37%
• Anxiety35%

Hospitals where Howard K. O Neil works

Medicare's Facility Affiliation Data lists Howard K. O Neil 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.

• UChicago Medicine AdventHealth BolingbrookBolingbrook, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140304
• UChicago Medicine AdventHealth GlenoaksGlendale Heights, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140292
• UChicago Medicine AdventHealth HinsdaleHinsdale, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140122
• UChicago Medicine AdventHealth La GrangeLa Grange, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140065

Practice locations

Addresses where Howard K. O Neil is enrolled with Medicare (CMS data updated October 2, 2026).

• 120 N Oak StHinsdale, IL 60521 (630) 856‑9000
• 5101 Willow Springs RdLa Grange, IL 60525 (708) 245‑9000
• 701 Winthrop AveGlendale Heights, IL 60139 (630) 545‑8000

Group practices

Medicare enrollment lists Howard K. O Neil as a member of this group (CMS data updated October 2, 2026).

• Suburban Radiologists, S.C.22 clinicians in the group

Specialties

• Diagnostic Radiologyprimary
• Interventional Radiologyalso

Find other Diagnostic Radiology doctors in Illinois →

Other radiologists in Hinsdale

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

• Suleimaan Waheed, DO
• Katherine E. Conlon, MD
• Scott K. Lee, MD
• Patricia E. Lee, MD
• Khushboo Jhala, MD
• Gaston A. Saint Martin, MD
• Kaushik Chagarlamudi, MD
• John Olivieri

All radiologists in Hinsdale →

Other clinicians in Suburban Radiologists, S.C.

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

• Suleimaan Waheed, DO
• Katherine E. Conlon, MD
• Scott K. Lee, MD
• Arjun Sharma, MD
• Susan Fanapour, DO
• Tony Kim, 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