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Emergency Medicine

Thomas C. Segerson, MD

Works at hospitals in Humble, TX · Texas

Summary

Dr. Thomas C. Segerson, MD is an emergency medicine doctor at 18951 N Memorial Dr, Memorial Hermann Emergency Physicians, Humble, TX 77338. Phone: (713) 338-6565. Accepts Medicare assignment. In 2024, Thomas C. Segerson had 260 Original Medicare patients and 437 services. NPI 1316352628. 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: 18951 N Memorial Dr, Memorial Hermann Emergency Physicians, Humble, TX 77338 · Directions
  • Phone: (713) 338‑6565
  • Medicare: Accepts Medicare assignment
  • Hospital: Memorial Hermann Northeast Hospital
  • Group practice: Memorial Hermann Hospital Based Physician Group
  • Medical school: University Of Rochester School Of Medicine And Dentistry · graduated 2014 (12 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Thomas C. Segerson, 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 Thomas C. Segerson accept Medicare assignment?
Yes. Medicare's clinician data says Thomas C. Segerson 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 Thomas C. Segerson see?
In 2024, CMS data shows 260 Original Medicare patients and 437 services for Thomas C. Segerson. This counts Original Medicare only and measures volume, not quality.
What is Thomas C. Segerson's NPI number?
1316352628. 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 Thomas C. Segerson, 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 patients260
Services billed to Medicare437
Different services or procedures11
Participating Medicare providerYes
Average age of these patients72

Most frequent services

  1. Emergency department visit with high level of medical decision making (99285)192 services
  2. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)164 services
  3. Emergency department visit with moderate level of medical decision making (99284)39 services
  4. Critical care, first 30-74 minutes (99291)32 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%
  • Arthritis54%
  • Ischemic heart disease48%
  • Diabetes45%
  • Chronic kidney disease45%

Hospitals where Thomas C. Segerson works

Medicare's Facility Affiliation Data lists Thomas C. Segerson 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 Thomas C. Segerson is enrolled with Medicare (CMS data updated October 2, 2026).

  • 18951 N Memorial Dr, Memorial Hermann Emergency PhysiciansHumble, TX 77338 (713) 338‑6565

Group practices

Medicare enrollment lists Thomas C. Segerson as a member of this group (CMS data updated October 2, 2026).

  • Memorial Hermann Hospital Based Physician Group276 clinicians in the group

Specialties

Find other Emergency Medicine doctors in Texas →

Other emergency medicine doctors in Humble

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

All emergency medicine doctors in Humble →

Other clinicians in Memorial Hermann Hospital Based Physician Group

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

Clinician information

CredentialMD
Medical schoolUniversity Of Rochester School Of Medicine And Dentistry
Graduation year2014 (12 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1316352628
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