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Anesthesiology

John E. Delhagen, MD

Works at hospitals in San Antonio, TX · Webster, TX · Texas

Summary

Dr. John E. Delhagen, MD is an anesthesiologist at 555 Creekside Xing, New Braunfels, TX 78130. Phone: (830) 500-6900. Accepts Medicare assignment. In 2024, John E. Delhagen had 643 Original Medicare patients and 951 services. NPI 1053325019. 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 John E. Delhagen, 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 John E. Delhagen accept Medicare assignment?
Yes. Medicare's clinician data says John E. Delhagen 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 John E. Delhagen see?
In 2024, CMS data shows 643 Original Medicare patients and 951 services for John E. Delhagen. This counts Original Medicare only and measures volume, not quality.
What is John E. Delhagen's NPI number?
1053325019. 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 John E. Delhagen, 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 patients643
Services billed to Medicare951
Different services or procedures4
Participating Medicare providerYes
Average age of these patients75

Most frequent services

  1. Anesthesia for lens surgery (00142)750 services
  2. Anesthesia for other procedure on eye (00140)119 services
  3. Anesthesia for retinal surgery (00145)51 services
  4. Anesthesia for procedure on eye for corneal transplant (00144)29 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%
  • Arthritis42%
  • Diabetes37%
  • Ischemic heart disease27%
  • Chronic kidney disease24%

Hospitals where John E. Delhagen works

Medicare's Facility Affiliation Data lists John E. Delhagen 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 John E. Delhagen is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists John E. Delhagen as a member of these groups (CMS data updated October 2, 2026).

  • U S Anesthesia Partners of Texas, PA2,752 clinicians in the group
  • Houston Anesthesia Services PLLC27 clinicians in the group

Specialties

Find other Anesthesiology doctors in Texas →

Other anesthesiologists in New Braunfels

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

All anesthesiologists in New Braunfels →

Other clinicians in U S Anesthesia Partners of Texas, PA

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

Clinician information

CredentialMD
Medical schoolWarren Alpert Medical School Of Brown University
Graduation year1992 (34 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1053325019
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