Medical emergency?Emergency? Call 911. Nearest emergency roomsNearest ERs

Internal Medicine

Monika U. Zagaja, MD

Works at hospitals in Bristol, CT · Torrington, CT · New London, CT … · Connecticut

Summary

Dr. Monika U. Zagaja, MD is an internal medicine doctor at 100 Grand St, New Britain, CT 06052. Phone: (860) 224-6623. Accepts Medicare assignment. In 2024, Monika U. Zagaja had 370 Original Medicare patients and 466 services. NPI 1942542337. 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.

From official Medicare data

This page shows what Medicare's official clinician data says about Monika U. Zagaja, 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 Monika U. Zagaja accept Medicare assignment?
Yes. Medicare's clinician data says Monika U. Zagaja 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 Monika U. Zagaja see?
In 2024, CMS data shows 370 Original Medicare patients and 466 services for Monika U. Zagaja. This counts Original Medicare only and measures volume, not quality.
What is Monika U. Zagaja's NPI number?
1942542337. 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 Monika U. Zagaja, 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 patients370
Services billed to Medicare466
Different services or procedures9
Participating Medicare providerYes
Average age of these patients76

Most frequent services

  1. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)278 services
  2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)88 services
  3. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)34 services
  4. Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)30 services
  5. Hospital discharge day management, more than 30 minutes (99239)26 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 disease54%
  • Diabetes51%
  • Arthritis51%
  • Chronic kidney disease48%

Hospitals where Monika U. Zagaja works

Medicare's Facility Affiliation Data lists Monika U. Zagaja 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.

  • Bristol HospitalBristol, CT · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 070029
  • Charlotte Hungerford HospitalTorrington, CT · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 070011
  • Lawrence & Memorial HospitalNew London, CT · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 070007
  • The Hospital of Central ConnecticutNew Britain, CT · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 070035

Practice locations

Addresses where Monika U. Zagaja is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Monika U. Zagaja as a member of these groups (CMS data updated October 2, 2026).

  • The Hospital of Central Connecticut at New Britain General and Bradley399 clinicians in the group
  • The Charlotte Hungerford Hospital200 clinicians in the group

Specialties

Find other Internal Medicine doctors in Connecticut →

Other internal medicine doctors in New Britain

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

All internal medicine doctors in New Britain →

Other clinicians in The Hospital of Central Connecticut at New Britain General and Bradley

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

Clinician information

CredentialMD
Graduation year2013 (13 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1942542337
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