Medical emergency?Emergency? Call 911. Nearest emergency roomsNearest ERs

Internal Medicine

Prashan H. Thiagarajah, MD

Works at hospitals in Pittsburgh, PA · Pennsylvania

Summary

Dr. Prashan H. Thiagarajah, MD is an internal medicine doctor at 1211 Wilmington Ave, New Castle, PA 16105. Phone: (724) 656-4660. Accepts Medicare assignment. In 2024, Prashan H. Thiagarajah had 346 Original Medicare patients and 3,454 services. NPI 1184924417. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: Internal medicine doctor (Medicare lists Internal Medicine)
  • Address: 1211 Wilmington Ave, New Castle, PA 16105 · Directions (6 more locations)
  • Phone: (724) 656‑4660
  • Medicare: Accepts Medicare assignment
  • Hospitals: Magee Womens Hospital of UPMC Health System, UPMC Passavant
  • Group practice: University of Pittsburgh Physicians (+2 more)
  • Medical school: graduated 2008 (18 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Prashan H. Thiagarajah, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Prashan H. Thiagarajah accept Medicare assignment?
Yes. Medicare's clinician data says Prashan H. Thiagarajah accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does Prashan H. Thiagarajah see?
In 2024, CMS data shows 346 Original Medicare patients and 3,454 services for Prashan H. Thiagarajah. This counts Original Medicare only and measures volume, not quality.
What is Prashan H. Thiagarajah's NPI number?
1184924417. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Prashan H. Thiagarajah, 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.

Original Medicare patients346
Services billed to Medicare3,454
Different services or procedures94
Participating Medicare providerYes
Average age of these patients73

Most frequent services

  1. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)573 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)363 services
  3. Insertion of needle into vein for collection of blood sample (36415)274 services
  4. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)221 services
  5. Testing for presence of drug, read by direct observation (80305)164 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%
  • Arthritis52%
  • Depression38%
  • Diabetes36%
  • Anxiety35%

Hospitals where Prashan H. Thiagarajah works

Medicare's Facility Affiliation Data lists Prashan H. Thiagarajah 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.

Practice locations

Addresses where Prashan H. Thiagarajah is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 7; the Medicare profile lists all.

Group practices

Medicare enrollment lists Prashan H. Thiagarajah as a member of these groups (CMS data updated October 2, 2026).

  • University of Pittsburgh Physicians4,236 clinicians in the group
  • Genesis Medical Associates, Inc.100 clinicians in the group
  • Clearfield-Jefferson Primary Care Associates PC77 clinicians in the group

Specialties

Find other Internal Medicine doctors in Pennsylvania →

Other internal medicine doctors in New Castle

Clinicians with the same Medicare primary specialty in New Castle, PA — not a recommendation.

All internal medicine doctors in New Castle →

Other clinicians in University of Pittsburgh Physicians

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

Clinician information

CredentialMD
Graduation year2008 (18 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1184924417
CorrectionsReport an error or suggest an update →

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