Andrew J. Okas, DO

Medicare activity in 2024

Official CMS public-use data for Andrew J. Okas, 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. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)260 services
2. Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)150 services
3. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)105 services
4. Hospital discharge day management, more than 30 minutes (99239)64 services
5. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)58 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 cholesterol72%
• Heart failure50%
• Arthritis47%
• Ischemic heart disease43%
• Chronic kidney disease43%

Hospitals where Andrew J. Okas works

Medicare's Facility Affiliation Data lists Andrew J. Okas 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.

• UnityPoint Health - MeriterMadison, WI · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 520089
• University of WI Hospitals & Clinics AuthorityMadison, WI · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 520098

Practice locations

Addresses where Andrew J. Okas is enrolled with Medicare (CMS data updated October 2, 2026).

• 202 S Park StMadison, WI 53715 (608) 417‑6000
• 3102 Meriter WayMadison, WI 53719 (608) 417‑8800

Group practices

Medicare enrollment lists Andrew J. Okas as a member of this group (CMS data updated October 2, 2026).

• Meriter Hospital Inc122 clinicians in the group

Specialties

• Internal Medicineprimary

Find other Internal Medicine doctors in Wisconsin →

Other internal medicine doctors in Madison

Clinicians with the same Medicare primary specialty in Madison, WI — not a recommendation.

• Rachael L. Ziska, DO
• Lawrence J. Ozers, MD
• Kathryn A. Miller, MD
• Sophie K. Kramer, MD
• Brenda N. Nishizawa, DO
• Erik C. Bartholomew, MD
• Heather E. Certain, MD
• Christopher D. Anderson, MD

All internal medicine doctors in Madison →

Other clinicians in Meriter Hospital Inc

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

• Chia Thao, NP
• Joshua P. Babu, MD
• Rebecca M. Radue, MD
• Rebekah K. Brannen
• Frances L. Pogue, MD
• Heather E. Certain, 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