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

Hand Surgery

Timothy R. Niacaris, MD

Works at hospitals in Arlington, TX · Fort Worth, TX · Texas

Summary

Dr. Timothy R. Niacaris, MD is a hand surgeon at 902 W Randol Mill Rd, Suite 120, Arlington, TX 76012. Phone: (817) 801-1503. Accepts Medicare assignment. In 2024, Timothy R. Niacaris had 124 Original Medicare patients and 829 services. NPI 1700033743. 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.

From official Medicare data

This page shows what Medicare's official clinician data says about Timothy R. Niacaris, 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 Timothy R. Niacaris accept Medicare assignment?
Yes. Medicare's clinician data says Timothy R. Niacaris 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 Timothy R. Niacaris see?
In 2024, CMS data shows 124 Original Medicare patients and 829 services for Timothy R. Niacaris. This counts Original Medicare only and measures volume, not quality.
What is Timothy R. Niacaris's NPI number?
1700033743. 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 Timothy R. Niacaris, 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 patients124
Services billed to Medicare829
Different services or procedures76
Participating Medicare providerYes
Average age of these patients75

Most frequent services

  1. Injection, triamcinolone acetonide, not otherwise specified, 10 mg (J3301)244 services
  2. X-ray of hand, minimum of 3 views (73130)70 services
  3. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)67 services
  4. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)51 services
  5. X-ray of wrist, minimum of 3 views (73110)48 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%
  • Arthritis68%
  • Anxiety36%
  • Depression35%
  • Diabetes33%

Hospitals where Timothy R. Niacaris works

Medicare's Facility Affiliation Data lists Timothy R. Niacaris 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 Timothy R. Niacaris is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Timothy R. Niacaris as a member of this group (CMS data updated October 2, 2026).

  • Texas Health Physicians Group1,365 clinicians in the group

Specialties

Find other Hand Surgery doctors in Texas →

Other hand surgeons in Texas

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

All hand surgeons in Texas →

Other clinicians in Texas Health Physicians Group

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

Clinician information

CredentialMD
Medical schoolUniversity Of Texas Southwestern Medical School At Dallas
Graduation year2004 (22 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1700033743
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