Johann J. Mathew, MD

Medicare activity in 2024

Official CMS public-use data for Johann J. Mathew, 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. Anesthesia for procedure on heart and large blood vessels (00560)15 services
2. Anesthesia for procedure to assess heart electrical activity (00537)13 services
3. Insertion of artery tube for blood sampling or infusion through skin (36620)13 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%
• Ischemic heart disease66%
• Arthritis56%
• Diabetes50%
• Heart failure50%

Hospitals where Johann J. Mathew works

Medicare's Facility Affiliation Data lists Johann J. Mathew 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.

• Hartford HospitalHartford, CT · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 070025
• John Dempsey Hospital of the University of ConnectFarmington, CT · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 070036
• William W Backus HospitalNorwich, CT · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 070024

Practice locations

Addresses where Johann J. Mathew is enrolled with Medicare (CMS data updated October 2, 2026).

• 326 Washington StNorwich, CT 06360 (860) 282‑0833
• 65 Memorial Rd, Suite 500West Hartford, CT 06107 (860) 586‑8655
• 80 Semour StHartford, CT 06106 (860) 972‑2117
• 80 Seymour StHartford, CT 06102 (860) 545‑7500

Group practices

Medicare enrollment lists Johann J. Mathew as a member of these groups (CMS data updated October 2, 2026).

• Hartford Hospital1,044 clinicians in the group
• Integrated Anesthesia Associates LLC409 clinicians in the group

Specialties

• Anesthesiologyprimary

Find other Anesthesiology doctors in Connecticut →

Other anesthesiologists in Norwich

Clinicians with the same Medicare primary specialty in Norwich, CT — not a recommendation.

• Daniel L. Hseuh, MD
• Kevin J. Finkel, MD
• Kevin M. Shaw, MD
• Alexander Stangle, DO
• Robert Petrillo, DO
• Adam D. Goldstein, MD
• Aymen Asad, MD
• David Y. Chung, MD

All anesthesiologists in Norwich →

Other clinicians in Hartford Hospital

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

• Tonya Ruggieri, MD
• Pamela C. Griswold, MD
• Patrick W. Ferguson
• Kelly Maloney
• Anumeha Singh, MD
• Harold I. Schwartz, 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