Colleen Sherkow, MD

Medicare activity in 2024

Official CMS public-use data for Colleen Sherkow, 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 moderate level of decision making, if using time, 30 minutes or more (99214)233 services
2. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)102 services
3. Administration of influenza virus vaccine (G0008)60 services
4. Influenza vaccine split virus, preservative free (90662)50 services
5. Admn sarscov2 vacc 1 dose (90480)44 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%
• Arthritis51%
• Diabetes30%
• Anxiety30%
• Chronic kidney disease30%

Hospitals where Colleen Sherkow works

Medicare's Facility Affiliation Data lists Colleen Sherkow 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.

• Griffin HospitalDerby, CT · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 070031
• Hartford HospitalHartford, CT · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 070025
• Midstate Medical CenterMeriden, CT · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 070017
• Yale-New Haven HospitalNew Haven, CT · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 070022

Practice locations

Addresses where Colleen Sherkow is enrolled with Medicare (CMS data updated October 2, 2026).

• 55 Meriden Ave, Suite 1dSouthington, CT 06489 (860) 276‑5144

Group practices

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

• Hartford Healthcare Medical Group Inc267 clinicians in the group

Specialties

• Internal Medicineprimary

Find other Internal Medicine doctors in Connecticut →

Other internal medicine doctors in Southington

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

• Letterio Asciuto, MD
• Gidon F. Goldenberg, MD
• Sarah Rasool
• Joseph A. Babiarz, MD
• Wilner Samson, MD
• Hanna H. Chao, MD
• Anthony D. Ciardella, MD
• Marques Johnson, MD

All internal medicine doctors in Southington →

Other clinicians in Hartford Healthcare Medical Group Inc

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

• Pallavi Lakra, MD
• Li Zhu, MD
• Eric J. Fisher, DO
• Shirley Y. Samy
• Letterio Asciuto, MD
• Gidon F. Goldenberg, 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