John H. Fischer Ii, MD

Medicare activity in 2024

Official CMS public-use data for John H. Fischer Ii, 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.

Most frequent services

1. X-ray of chest, 1 view (71045)126 services
2. Ct scan of abdomen and pelvis with contrast (74177)63 services
3. Ct scan of blood vessels of chest with contrast (71275)42 services
4. Ct scan of abdomen and pelvis without contrast (74176)38 services
5. Ct scan of chest without contrast (71250)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%
• Arthritis57%
• Ischemic heart disease52%
• Diabetes47%
• Chronic kidney disease43%

Hospitals where John H. Fischer Ii works

Medicare's Facility Affiliation Data lists John H. Fischer Ii 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.

• Memorial Hermann Northeast HospitalHumble, TX · Acute Care Hospital · Medicare rating: 3 of 5 stars · CCN 450684

Practice locations

Addresses where John H. Fischer Ii is enrolled with Medicare (CMS data updated October 2, 2026).

• 23510 Kingsland Blvd, Suite 100Katy, TX 77494 (866) 552‑4866
• 251 W Medical Ctr Blvd, Suite 200Webster, TX 77598 (866) 552‑4866
• 9250 Pinecroft DrShenandoah, TX 77380 (713) 897‑2300

Group practices

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

• Singleton Associates PA838 clinicians in the group
• Interventional Partners PLLC95 clinicians in the group

Specialties

• Diagnostic Radiologyprimary

Find other Diagnostic Radiology doctors in Texas →

Other radiologists in Katy

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

• Ezinne Ihenachor, MD
• Ashmitha Srinivasan, MD
• Sean Bender, MD
• Adam D. Rulnick, MD
• Michael Evans, MD
• Ndy Ikwuagwu, MD

All radiologists in Katy →

Other clinicians in Singleton Associates PA

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

• Eniola F. Mudasiru-Dawodu, MD
• Joseph P. Morand, MD
• Melanie Dahse, MD
• David B. Fox, MD
• Gregory C. Downing, MD
• Fredric M. Pfeifer Ii, MD

Clinician information

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