Tatyana M. Gerachshenko

Medicare activity in 2024

Official CMS public-use data for Tatyana M. Gerachshenko, 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)1,137 services
2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)384 services
3. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)167 services
4. Hospital discharge day management, more than 30 minutes (99239)137 services
5. Prolonged hospital inpatient or observation care evaluation and management service(s) beyond the total time for the primary service (when the primary service has been selected using time on the date of the primary service); each additional 15 minutes by th (G0316)40 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%
• Arthritis65%
• Chronic kidney disease56%
• Ischemic heart disease54%
• Depression45%

Hospitals where Tatyana M. Gerachshenko works

Medicare's Facility Affiliation Data lists Tatyana M. Gerachshenko 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.

• Oconomowoc Memorial HospitalOconomowoc, WI · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 520062
• Waukesha Memorial HospitalWaukesha, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520008

Practice locations

Addresses where Tatyana M. Gerachshenko is enrolled with Medicare (CMS data updated October 2, 2026).

• 721 American Ave, Suite 108Waukesha, WI 53188 (262) 928‑8200

Group practices

Medicare enrollment lists Tatyana M. Gerachshenko as a member of this group (CMS data updated October 2, 2026).

• Prohealth Medical Group Inc479 clinicians in the group

Specialties

• Physical Medicine and Rehabilitationprimary

Find other Physical Medicine and Rehabilitation doctors in Wisconsin →

Other rehabilitation doctors in Waukesha

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

• Jennifer Coulter, DO
• Sheila S. Bhat, MD
• Angela M. Taylor, DO
• Colleen M. Correa, DO

All rehabilitation doctors in Waukesha →

Other clinicians in Prohealth Medical Group Inc

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

• Charles E. Allen Jr., MD
• Petar Duvnjak, MD
• William R. Cooper, MD
• Dayken Underdahl
• Mark E. Hwang, MD
• Michelle K. Heaton, DO

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