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Internal Medicine

Christian Leonardi, DO

Works at hospitals in Danbury, CT · Derby, CT · Connecticut

Summary

Dr. Christian Leonardi, DO is an internal medicine doctor at 11 Old Park Lane, New Milford, CT 06776. Phone: (860) 355-1149. Accepts Medicare assignment. In 2024, Christian Leonardi had 398 Original Medicare patients and 1,656 services. NPI 1134112824. 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: 11 Old Park Lane, New Milford, CT 06776 · Directions (3 more locations)
  • Phone: (860) 355‑1149
  • Medicare: Accepts Medicare assignment
  • Hospitals: Danbury Hospital, Griffin Hospital
  • Group practice: Ptsma Inc (+1 more)
  • Medical school: University Of New England, College Of Osteo Medicine · graduated 2000 (26 years since medical school)
  • Gender (as listed): Male
  • Telehealth: offered

From official Medicare data

This page shows what Medicare's official clinician data says about Christian Leonardi, 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 Christian Leonardi accept Medicare assignment?
Yes. Medicare's clinician data says Christian Leonardi 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 Christian Leonardi see?
In 2024, CMS data shows 398 Original Medicare patients and 1,656 services for Christian Leonardi. This counts Original Medicare only and measures volume, not quality.
What is Christian Leonardi's NPI number?
1134112824. 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 Christian Leonardi, 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 patients398
Services billed to Medicare1,656
Different services or procedures56
Participating Medicare providerYes
Average age of these patients75

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)618 services
  2. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)228 services
  3. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)153 services
  4. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)121 services
  5. Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)117 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%
  • Arthritis39%
  • Ischemic heart disease30%
  • Diabetes26%
  • Anxiety21%

Hospitals where Christian Leonardi works

Medicare's Facility Affiliation Data lists Christian Leonardi 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.

  • Danbury HospitalDanbury, CT · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 070033
  • Griffin HospitalDerby, CT · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 070031

Practice locations

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

Group practices

Medicare enrollment lists Christian Leonardi as a member of these groups (CMS data updated October 2, 2026).

  • Ptsma Inc224 clinicians in the group
  • New Milford Medical Group, LLC9 clinicians in the group

Specialties

Find other Internal Medicine doctors in Connecticut →

Other internal medicine doctors in New Milford

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

All internal medicine doctors in New Milford →

Other clinicians in Ptsma Inc

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

Clinician information

CredentialDO
Medical schoolUniversity Of New England, College Of Osteo Medicine
Graduation year2000 (26 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1134112824
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