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Internal Medicine

Peter S. Zijlstra, DO

Works at hospitals in Daytona Beach, FL · Cape Coral, FL · Jupiter, FL … · Florida

Summary

Dr. Peter S. Zijlstra, DO is an internal medicine doctor at 1000 Waterman Way, Tavares, FL 32778. Phone: (352) 742-3581. Accepts Medicare assignment. In 2024, Peter S. Zijlstra had 527 Original Medicare patients and 1,202 services. NPI 1598283327. 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 Peter S. Zijlstra, 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 Peter S. Zijlstra accept Medicare assignment?
Yes. Medicare's clinician data says Peter S. Zijlstra 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 Peter S. Zijlstra see?
In 2024, CMS data shows 527 Original Medicare patients and 1,202 services for Peter S. Zijlstra. This counts Original Medicare only and measures volume, not quality.
What is Peter S. Zijlstra's NPI number?
1598283327. 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 Peter S. Zijlstra, 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 patients527
Services billed to Medicare1,202
Different services or procedures10
Participating Medicare providerYes
Average age of these patients78

Most frequent services

  1. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)371 services
  2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)295 services
  3. Hospital discharge day management, more than 30 minutes (99239)228 services
  4. Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)108 services
  5. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)103 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 disease61%
  • Arthritis60%
  • Chronic kidney disease50%
  • Heart failure50%

Hospitals where Peter S. Zijlstra works

Medicare's Facility Affiliation Data lists Peter S. Zijlstra 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 Peter S. Zijlstra is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 9; the Medicare profile lists all.

Group practices

Medicare enrollment lists Peter S. Zijlstra as a member of these groups (CMS data updated October 2, 2026).

  • Lee Health System Inc1,428 clinicians in the group
  • Florida Hospital Healthcare Partners, Inc642 clinicians in the group
  • Lakeland Regional Health Systems Inc536 clinicians in the group
  • Jupiter Medical Center Physicians Group Inc155 clinicians in the group
  • Accountable Teaching Services LLC21 clinicians in the group

Specialties

Find other Internal Medicine doctors in Florida →

Other internal medicine doctors in Tavares

Clinicians with the same Medicare primary specialty in Tavares, FL — not a recommendation.

All internal medicine doctors in Tavares →

Other clinicians in Lee Health System 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 year2017 (9 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1598283327
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