Joanna Greenhalgh, DO

Medicare activity in 2024

Official CMS public-use data for Joanna Greenhalgh, 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. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)114 services
2. New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)54 services
3. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)22 services
4. X-ray of chest, 2 views (71046)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%
• Arthritis53%
• Ischemic heart disease38%
• Anxiety28%
• Atrial fibrillation27%

Hospitals where Joanna Greenhalgh works

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

• 12899 Walsingham RdLargo, FL 33774 (727) 596‑9490

Group practices

Medicare enrollment lists Joanna Greenhalgh as a member of this group (CMS data updated October 2, 2026).

• BayCare Medical Group, Inc.1,547 clinicians in the group

Specialties

• Family Practiceprimary

Find other Family Practice doctors in Florida →

Other family doctors in Largo

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

• Daniel A. Eckstein, MD
• Angel A. Perez Sori, MD
• Geeta Mehan, MD
• Amber R. Stephens, MD
• Rajay D. Seudath, MD
• Tony Tran, DO
• Liudmila Buell, MD
• Megan G. McGrath, MD

All family doctors in Largo →

Other clinicians in BayCare Medical Group, Inc.

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

• Saira B. Campos
• Susan L. Schweiger Salazar, CNM
• Rose T. Trotta, MD
• Richard Hirasuna, MD
• Michael Lopez-Molina
• Duy M. Nguyen, 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