Johanna M. Seddon, MD

Medicare activity in 2024

Official CMS public-use data for Johanna M. Seddon, 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. Imaging of retina (92134)365 services
2. Established patient complete exam of visual system (92014)328 services
3. Injection of drug into eye (67028)236 services
4. New patient complete exam of visual system (92004)27 services
5. Established patient problem focused exam of visual system (92012)12 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%
• Arthritis41%
• Diabetes38%
• Ischemic heart disease30%
• Chronic kidney disease30%

Hospitals where Johanna M. Seddon works

Medicare's Facility Affiliation Data lists Johanna M. Seddon 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.

• UMass Memorial Medical Center/University CampusWorcester, MA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 220163

Practice locations

Addresses where Johanna M. Seddon is enrolled with Medicare (CMS data updated October 2, 2026).

• 281 Lincoln StWorcester, MA 01605 (508) 334‑1000

Group practices

Medicare enrollment lists Johanna M. Seddon as a member of this group (CMS data updated October 2, 2026).

• UMass Memorial Medical Group Inc2,516 clinicians in the group

Specialties

• Ophthalmologyprimary

Find other Ophthalmology doctors in Massachusetts →

Other ophthalmologists in Worcester

Clinicians with the same Medicare primary specialty in Worcester, MA — not a recommendation.

• Stuart W. Weisman, MD
• Chukwuemeka C. Nwanze, MD
• Jeffrey P. Gallo, MD
• Jeffrey D. Levine, MD
• Jad Ayash, MD
• Priya M. Janardhana, MD
• Narae Ko, MD
• Teri T. Kleinberg, MD

All ophthalmologists in Worcester →

Other clinicians in UMass Memorial Medical Group Inc

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

• Sushma Kumari Basa, MD
• Emilia Miranda Feu
• Ryan Boyd
• Robert G. Sexton, MD
• Duncan Daviau, PA
• Prateek Shukla, DO

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