Nishant Tiwari, MD

Medicare activity in 2024

Official CMS public-use data for Nishant Tiwari, 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. Special stained specimen slides to examine tissue, each additional procedure (88341)139 services
2. Pathology examination of tissue using a microscope, moderately high complexity (88307)63 services
3. Special stained specimen slides to examine tissue, initial procedure (88342)42 services
4. Microscopic genetic analysis of tumor, manual (88360)36 services
5. Pathology examination of tissue using a microscope, intermediate complexity (88305)23 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 pressure74%
• High cholesterol64%
• Arthritis56%
• Stroke or mini-stroke37%
• Ischemic heart disease34%
• Anxiety30%

Hospitals where Nishant Tiwari works

Medicare's Facility Affiliation Data lists Nishant Tiwari 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.

• OHSU Hospital and ClinicsPortland, OR · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 380009

Practice locations

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

• 3181 SW Sam Jackson Park RdPortland, OR 97239 (503) 494‑8311

Group practices

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

• University Professional Services1,724 clinicians in the group

Specialties

• Pathologyprimary

Find other Pathology doctors in Oregon →

Other pathologists in Portland

Clinicians with the same Medicare primary specialty in Portland, OR — not a recommendation.

• Sarah Walter, MD
• Todd Williams, MD
• Marcela Riveros Angel, MD
• Ken M. Gatter, MD
• Brian N. Werstein, MD
• Brian T. Brinkerhoff, MD
• Camilla Allen, MD
• Gregory D. Scott, MD

All pathologists in Portland →

Other clinicians in University Professional Services

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

• Maros Ferencik, MD
• Alia Mowery, MD
• Jeffrey M. Healey, MD
• Christopher R. Shaw, MD
• Maria Palazeti, MD
• Manasi Joshi, 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