Marjan L. Koch, MD

Medicare activity in 2024

Official CMS public-use data for Marjan L. Koch, 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)223 services
2. Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)63 services
3. Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)16 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%
• Arthritis53%
• Ischemic heart disease50%
• Anxiety50%
• Depression44%

Hospitals where Marjan L. Koch works

Medicare's Facility Affiliation Data lists Marjan L. Koch 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.

• Cooper University HospitalCamden, NJ · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 310014

Practice locations

Addresses where Marjan L. Koch is enrolled with Medicare (CMS data updated October 2, 2026).

• 900 Centennial Blvd MVoorhees, NJ 08043 (856) 325‑6750

Group practices

Medicare enrollment lists Marjan L. Koch as a member of this group (CMS data updated October 2, 2026).

• CMC Department of Medicine Group PA478 clinicians in the group

Specialties

• Hematology/Oncologyprimary
• Internal Medicinealso

Find other Hematology/Oncology doctors in New Jersey →

Other hematologist-oncologists in Voorhees

Clinicians with the same Medicare primary specialty in Voorhees, NJ — not a recommendation.

• Stephen E. Zrada, MD
• Trina Poretta, DO
• Ruby Hanna, MD

All hematologist-oncologists in Voorhees →

Other clinicians in CMC Department of Medicine Group PA

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

• Matthew L. Ortman, MD
• Teresita Devera, NP
• Maura C. Porto, DO
• Emily Walzer, MD
• Curtis Allumbaugh, MD
• Alana Persaud, 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