Louis G. Jenis, MD

Medicare activity in 2024

Official CMS public-use data for Louis G. Jenis, 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. New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)42 services
2. Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)27 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%
• Arthritis71%
• Ischemic heart disease42%
• Diabetes39%
• Anxiety34%

Hospitals where Louis G. Jenis works

Medicare's Facility Affiliation Data lists Louis G. Jenis 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.

• St Vincent HospitalWorcester, MA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 220176

Practice locations

Addresses where Louis G. Jenis is enrolled with Medicare (CMS data updated October 2, 2026).

• 123 Summer StWorcester, MA 01608 (508) 363‑5000
• 133 Brookline AveBoston, MA 02215 (617) 421‑1000
• 228 Billerica RdChelmsford, MA 01824 (978) 250‑6000
• 24 Newton StSouthborough, MA 01772 (508) 486‑4472

Group practices

Medicare enrollment lists Louis G. Jenis as a member of these groups (CMS data updated October 2, 2026).

• Atrius Health Inc1,222 clinicians in the group
• Reliant Medical Group Inc640 clinicians in the group

Specialties

• Orthopedic Surgeryprimary

Find other Orthopedic Surgery doctors in Massachusetts →

Other orthopedic surgeons in Worcester

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

• David C. Ayers, MD
• Scott Pascal, MD
• Daniel L. Aaron, MD
• Donald H. Hangen, MD
• Philip J. Lahey Iv, MD
• Robert R. Hall, MD
• Mark Kraus, MD
• Ian Wellington

All orthopedic surgeons in Worcester →

Other clinicians in Atrius Health Inc

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

• Nora L. Watson
• John A. Zambrano, MD
• Linda M. Rice, CNM
• Carolyn L. Dinjian, NP
• Mina Sehizadeh, OD
• Joseph Olandt, PA

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