Madhan Nellaiyappan, MD

Medicare activity in 2024

Official CMS public-use data for Madhan Nellaiyappan, 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. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)133 services
2. Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)114 services
3. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)110 services
4. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)93 services
5. Evaluation of single, dual, or multiple lead implantable defibrillator system, remote up to 90 days (93295)62 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%
• Atrial fibrillation68%
• Heart failure58%
• Ischemic heart disease49%
• Arthritis43%

Hospitals where Madhan Nellaiyappan works

Medicare's Facility Affiliation Data lists Madhan Nellaiyappan 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.

• Legacy Salmon Creek Medical CenterVancouver, WA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 500150
• OHSU Hospital and ClinicsPortland, OR · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 380009
• PeaceHealth Southwest Medical CenteVancouver, WA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: not listed by Medicare · CCN 500050

Practice locations

Addresses where Madhan Nellaiyappan is enrolled with Medicare (CMS data updated October 2, 2026).

• 200 NE Mother Joseph Pl, Suite 400Vancouver, WA 98664 (360) 256‑2640

Group practices

Medicare enrollment lists Madhan Nellaiyappan as a member of this group (CMS data updated October 2, 2026).

• PeaceHealth103 clinicians in the group

Specialties

• Cardiac Electrophysiologyprimary

Find other Cardiac Electrophysiology doctors in Washington →

Other cardiac electrophysiologists in Washington

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

• Stephen J. Rechenmacher, MD
• Benjamin T. John, MD
• Peter Kudenchuk, MD
• Arun R Mahankali Sridhar, MD
• Kasturi K. Ghia, MD
• Makoto Nagahama, MD
• Matthew Sather, MD
• Shaun L. Ageno, MD

All cardiac electrophysiologists in Washington →

Other clinicians in PeaceHealth

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

• Lisa M. Elsasser, CSW
• John A. Nusser, MD
• Peter Black, MD
• Aimee Slater, CSW
• Yamac Gungor, MD
• Margaret L. Grove, 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