William S. Foulsham, MD

Medicare activity in 2024

Official CMS public-use data for William S. Foulsham, 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)44 services
2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)36 services
3. Repair of detached retina with drainage and removal of eye fluid between lens and retina (67108)20 services
4. Injection of drug into eye (67028)17 services
5. 2d ultrasound scan of eye tissue and structures (76512)17 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%
• Arthritis43%
• Diabetes30%
• Ischemic heart disease26%
• Depression23%

Hospitals where William S. Foulsham works

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

• 21 Worthen RdLexington, MA 02421 (781) 862‑1620
• 67 Belmont St, Suite 302Worcester, MA 01605 (508) 752‑1155
• 975 Merriam Ave, Suite 117Leominster, MA 01453 (508) 752‑1155

Group practices

Medicare enrollment lists William S. Foulsham as a member of these groups (CMS data updated October 2, 2026).

• Lexington Eye Associates - Bid34 clinicians in the group
• Lexington Eye Associates, Inc34 clinicians in the group
• Vitreo-Retinal Associates PC5 clinicians in the group

Specialties

• Ophthalmologyprimary

Find other Ophthalmology doctors in Massachusetts →

Other ophthalmologists in Lexington

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

• Daniel Lefebvre
• Frank J. McCabe, MD
• Nedda S. Del Plato, MD
• Elton K. Zhou, MD
• Li-Wei Lin, MD
• Brad Baker, MD
• Bryan K. Hong, MD
• Marianeli Rodriguez

All ophthalmologists in Lexington →

Other clinicians in Lexington Eye Associates - Bid

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

• Daniel Lefebvre
• Gabriella M. Velonias
• Frank J. McCabe, MD
• James W. Umlas, MD
• Nicole H. Siegel, MD
• Heather A. Bell, OD

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