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Internal Medicine

Timothy J. Zeien Ii, MD

Works at hospitals in Tarpon Springs, FL · Safety Harbor, FL · Dunedin, FL … · Florida

Summary

Dr. Timothy J. Zeien Ii, MD is an internal medicine doctor at 1840 Mease Dr, Safety Harbor, FL 34695. Phone: (727) 725-5060. Accepts Medicare assignment. In 2024, Timothy J. Zeien Ii had 506 Original Medicare patients and 1,653 services. NPI 1710939616. 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: 1840 Mease Dr, Safety Harbor, FL 34695 · Directions (6 more locations)
  • Phone: (727) 725‑5060
  • Medicare: Accepts Medicare assignment
  • Hospitals: AdventHealth North Pinellas, Mease Countryside Hospital, Mease Dunedin Hospital and 2 more
  • Group practice: BayCare Medical Group, Inc.
  • Medical school: University Of Miami, Lm Miller School Of Medicine · graduated 1995 (31 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 Timothy J. Zeien Ii, 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 Timothy J. Zeien Ii accept Medicare assignment?
Yes. Medicare's clinician data says Timothy J. Zeien Ii 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 Timothy J. Zeien Ii see?
In 2024, CMS data shows 506 Original Medicare patients and 1,653 services for Timothy J. Zeien Ii. This counts Original Medicare only and measures volume, not quality.
What is Timothy J. Zeien Ii's NPI number?
1710939616. 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 Timothy J. Zeien Ii, 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 patients506
Services billed to Medicare1,653
Different services or procedures32
Participating Medicare providerYes
Average age of these patients77

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)742 services
  2. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)330 services
  3. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)159 services
  4. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)49 services
  5. Transitional care management services for problem of at least moderate complexity (99495)41 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 disease55%
  • Arthritis54%
  • Chronic kidney disease37%
  • Atrial fibrillation26%

Hospitals where Timothy J. Zeien Ii works

Medicare's Facility Affiliation Data lists Timothy J. Zeien Ii 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.

  • AdventHealth North PinellasTarpon Springs, FL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 100055
  • Mease Countryside HospitalSafety Harbor, FL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 100265
  • Mease Dunedin HospitalDunedin, FL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 100043
  • Morton Plant HospitalClearwater, FL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 100127
  • St Josephs HospitalTampa, FL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 100075

Practice locations

Addresses where Timothy J. Zeien Ii is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 7; the Medicare profile lists all.

Group practices

Medicare enrollment lists Timothy J. Zeien Ii as a member of this group (CMS data updated October 2, 2026).

  • BayCare Medical Group, Inc.1,547 clinicians in the group

Specialties

Find other Internal Medicine doctors in Florida →

Other internal medicine doctors in Safety Harbor

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

All internal medicine doctors in Safety Harbor →

Other clinicians in BayCare Medical Group, Inc.

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

Clinician information

CredentialMD
Medical schoolUniversity Of Miami, Lm Miller School Of Medicine
Graduation year1995 (31 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1710939616
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