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Emergency Medicine

Stephanie K. Clark, MD

Works at hospitals in Austin, TX · Texas

Summary

Dr. Stephanie K. Clark, MD is an emergency medicine doctor at 2400 Round Rock Ave, Round Rock, TX 78681. Phone: (512) 341-1000. Accepts Medicare assignment. In 2024, Stephanie K. Clark had 430 Original Medicare patients and 651 services. NPI 1578907549. 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: Emergency medicine doctor (Medicare lists Emergency Medicine)
  • Address: 2400 Round Rock Ave, Round Rock, TX 78681 · Directions (1 more location)
  • Phone: (512) 341‑1000
  • Medicare: Accepts Medicare assignment
  • Hospital: North Austin Medical Center
  • Group practice: Longhorn Emergency Medical Associates PA
  • Medical school: graduated 2013 (13 years since medical school)
  • Gender (as listed): Female

From official Medicare data

This page shows what Medicare's official clinician data says about Stephanie K. Clark, 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 Stephanie K. Clark accept Medicare assignment?
Yes. Medicare's clinician data says Stephanie K. Clark 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 Stephanie K. Clark see?
In 2024, CMS data shows 430 Original Medicare patients and 651 services for Stephanie K. Clark. This counts Original Medicare only and measures volume, not quality.
What is Stephanie K. Clark's NPI number?
1578907549. 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 Stephanie K. Clark, 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 patients430
Services billed to Medicare651
Different services or procedures36
Participating Medicare providerYes
Average age of these patients77

Most frequent services

  1. Emergency department visit with high level of medical decision making (99285)348 services
  2. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)153 services
  3. Emergency department visit with moderate level of medical decision making (99284)65 services
  4. X-ray of chest, 1 view (71045)12 services
  5. Critical care, first 30-74 minutes (99291)11 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%
  • Arthritis57%
  • Ischemic heart disease47%
  • Diabetes46%
  • Depression45%

Hospitals where Stephanie K. Clark works

Medicare's Facility Affiliation Data lists Stephanie K. Clark 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 Stephanie K. Clark is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Stephanie K. Clark as a member of this group (CMS data updated October 2, 2026).

  • Longhorn Emergency Medical Associates PA159 clinicians in the group

Specialties

Find other Emergency Medicine doctors in Texas →

Other emergency medicine doctors in Round Rock

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

All emergency medicine doctors in Round Rock →

Other clinicians in Longhorn Emergency Medical Associates PA

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

Clinician information

CredentialMD
Graduation year2013 (13 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1578907549
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