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Internal Medicine

Mark A. Piekarsky, MD

Works at hospitals in New Britain, CT · Connecticut

Summary

Dr. Mark A. Piekarsky, MD is an internal medicine doctor at 100 Simsbury Rd, Avon, CT 06001. Phone: (860) 258-3480. Accepts Medicare assignment. In 2024, Mark A. Piekarsky had 251 Original Medicare patients and 968 services. NPI 1558355792. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: Internal medicine doctor (Medicare lists Internal Medicine)
  • Address: 100 Simsbury Rd, Avon, CT 06001 · Directions (1 more location)
  • Phone: (860) 258‑3480
  • Medicare: Accepts Medicare assignment
  • Hospital: The Hospital of Central Connecticut
  • Group practice: Starling Physicians, PLLC
  • Medical school: State University Of New York At Stony Brook, School Of Medicine · graduated 1996 (30 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Mark A. Piekarsky, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Mark A. Piekarsky accept Medicare assignment?
Yes. Medicare's clinician data says Mark A. Piekarsky accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does Mark A. Piekarsky see?
In 2024, CMS data shows 251 Original Medicare patients and 968 services for Mark A. Piekarsky. This counts Original Medicare only and measures volume, not quality.
What is Mark A. Piekarsky's NPI number?
1558355792. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Mark A. Piekarsky, 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.

Original Medicare patients251
Services billed to Medicare968
Different services or procedures20
Participating Medicare providerYes
Average age of these patients77

Most frequent services

  1. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)439 services
  2. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)213 services
  3. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)98 services
  4. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)86 services
  5. Administration of influenza virus vaccine (G0008)37 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%
  • Arthritis35%
  • Chronic kidney disease29%
  • Diabetes27%
  • Ischemic heart disease27%

Hospitals where Mark A. Piekarsky works

Medicare's Facility Affiliation Data lists Mark A. Piekarsky 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.

Practice locations

Addresses where Mark A. Piekarsky is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Mark A. Piekarsky as a member of this group (CMS data updated October 2, 2026).

  • Starling Physicians, PLLC283 clinicians in the group

Specialties

Find other Internal Medicine doctors in Connecticut →

Other internal medicine doctors in Avon

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

All internal medicine doctors in Avon →

Other clinicians in Starling Physicians, PLLC

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

Clinician information

CredentialMD
Medical schoolState University Of New York At Stony Brook, School Of Medicine
Graduation year1996 (30 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1558355792
CorrectionsReport an error or suggest an update →

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