Johana B. Castro Wagner, MD

Medicare activity in 2024

Official CMS public-use data for Johana B. Castro Wagner, 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. Test for allergy using allergenic extract (95004)993 services
2. Professional service for preparation and provision of 1 or more antigens (95165)940 services
3. Test for allergy using allergenic extract injected into skin (95024)263 services
4. Professional service for multiple injections of allergen (95117)158 services
5. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)135 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 cholesterol75%
• High blood pressure67%
• Arthritis52%
• Asthma42%
• Anxiety31%
• Ischemic heart disease29%

Hospitals where Johana B. Castro Wagner works

Medicare's Facility Affiliation Data lists Johana B. Castro Wagner 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.

• Morton Plant HospitalClearwater, FL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 100127

Practice locations

Addresses where Johana B. Castro Wagner is enrolled with Medicare (CMS data updated October 2, 2026).

• 11200 Seminole Blvd, Suite 310Largo, FL 33778 (727) 397‑8557

Group practices

Medicare enrollment lists Johana B. Castro Wagner as a member of this group (CMS data updated October 2, 2026).

• Florida Pediatric Associates, LLC35 clinicians in the group

Specialties

• Allergy/Immunologyprimary

Find other Allergy/Immunology doctors in Florida →

Other allergist and immunologists in Largo

Clinicians with the same Medicare primary specialty in Largo, FL — not a recommendation.

• Catherine Kubiak, MD
• David M. Gubernick, MD
• Samuel Gubernick, DO
• Mandel R. Sher, MD

All allergist and immunologists in Largo →

Other clinicians in Florida Pediatric Associates, LLC

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

• Leah R. Chernin, DO
• Alan B. Halsey, MD
• Megha Pansara, MD
• Louis C. Blumenfeld, MD
• Vikisha Hazariwala, DO
• Kris-Ann S. Humphrey, 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