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

Orthopedic Surgery

Steven R. Niedermeier, MD

Works at hospitals in Mansfield, TX · Texas

Summary

Dr. Steven R. Niedermeier, MD is an orthopedic surgeon at 3533 Matlock Rd, Arlington, TX 76015. Phone: (817) 419-0303. May accept Medicare assignment. In 2024, Steven R. Niedermeier had 294 Original Medicare patients and 2,025 services. NPI 1447647599. 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: Orthopedic surgeon (Medicare lists Orthopedic Surgery)
  • Address: 3533 Matlock Rd, Arlington, TX 76015 · Directions
  • Phone: (817) 419‑0303
  • Medicare: May accept Medicare assignment
  • Hospital: Methodist Mansfield Medical Center
  • Group practice: Tmi Sports Medicine and Orthopedic Surgery PA
  • Medical school: Ohio State University College Of Medicine · graduated 2015 (11 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Steven R. Niedermeier, 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 Steven R. Niedermeier accept Medicare assignment?
Medicare's clinician data says Steven R. Niedermeier may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
How many Medicare patients does Steven R. Niedermeier see?
In 2024, CMS data shows 294 Original Medicare patients and 2,025 services for Steven R. Niedermeier. This counts Original Medicare only and measures volume, not quality.
What is Steven R. Niedermeier's NPI number?
1447647599. 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 Steven R. Niedermeier, 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 patients294
Services billed to Medicare2,025
Different services or procedures108
Participating Medicare providerYes
Average age of these patients74

Most frequent services

  1. Injection, betamethasone acetate 3 mg and betamethasone sodium phosphate 3 mg (J0702)230 services
  2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)198 services
  3. X-ray of hand, minimum of 3 views (73130)140 services
  4. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)122 services
  5. X-ray of shoulder, minimum of 2 views (73030)98 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%
  • Arthritis72%
  • Ischemic heart disease28%
  • Diabetes27%
  • Depression26%

Hospitals where Steven R. Niedermeier works

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

Group practices

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

  • Tmi Sports Medicine and Orthopedic Surgery PA21 clinicians in the group

Specialties

Find other Orthopedic Surgery doctors in Texas →

Other orthopedic surgeons in Arlington

Clinicians with the same Medicare primary specialty in Arlington, TX — not a recommendation.

All orthopedic surgeons in Arlington →

Other clinicians in Tmi Sports Medicine and Orthopedic Surgery PA

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

Clinician information

CredentialMD
Medical schoolOhio State University College Of Medicine
Graduation year2015 (11 years since medical school)
Gender (as listed)Male
Medicare assignmentMay accept for some services
NPI (National Provider Identifier)1447647599
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