Marek N. Denisiuk, DO

Medicare activity in 2024

Official CMS public-use data for Marek N. Denisiuk, 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. Treatment of broken neck of thigh bone with bone implant (27245)29 services
2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)22 services
3. Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)17 services
4. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)13 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%
• Arthritis61%
• Chronic kidney disease47%
• Depression45%
• Diabetes43%

Hospitals where Marek N. Denisiuk works

Medicare's Facility Affiliation Data lists Marek N. Denisiuk 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.

• Bayhealth Hospital, Sussex CampusMilford, DE · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 080009
• Bayhealth Medical Center, Kent CampusDover, DE · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 080004
• Beebe Medical CenterLewes, DE · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 080007

Practice locations

Addresses where Marek N. Denisiuk is enrolled with Medicare (CMS data updated October 2, 2026).

• 315 S Carter Rd, Bayhealth Ortho Surgery SmyrnaSmyrna, DE 19977 (302) 730‑4366

Group practices

Medicare enrollment lists Marek N. Denisiuk as a member of this group (CMS data updated October 2, 2026).

• Bayhealth Medical Center, Inc413 clinicians in the group

Specialties

• Orthopedic Surgeryprimary

Find other Orthopedic Surgery doctors in Delaware →

Other orthopedic surgeons in Delaware

Clinicians with the same Medicare primary specialty in Delaware — not a recommendation.

• Nicholas Quercetti Iii, DO
• Michael W. Shrader, MD
• Eric T. Johnson, MD
• Lawrence Piccioni, MD
• Paul C. Kupcha, MD
• Joseph J. Mesa, MD
• William Mackenzie, MD
• Christopher A. Rivera-Pintado, MD

All orthopedic surgeons in Delaware →

Other clinicians in Bayhealth Medical Center, Inc

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

• Bryan Patrick D. Villar, MD
• Madhulika Urella, MD
• David Ramos, MD
• Sana Hyder, MD
• Kelly Ryan, NP
• Robert S. Baeder, 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