Zachary P. Thielen, MD

Medicare activity in 2024

Official CMS public-use data for Zachary P. Thielen, 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.

Most frequent services

1. Injection, triamcinolone acetonide, not otherwise specified, 10 mg (J3301)516 services
2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)158 services
3. Aspiration and/or injection of fluid large joint using ultrasound guidance (20611)133 services
4. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)129 services
5. New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)105 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 cholesterol75%
• Arthritis75%
• High blood pressure58%
• Diabetes17%
• Ischemic heart disease17%
• Chronic kidney disease17%

Hospitals where Zachary P. Thielen works

Medicare's Facility Affiliation Data lists Zachary P. Thielen 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.

• Maui Memorial Medical CenterWailuku, HI · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: not listed by Medicare · CCN 120002

Practice locations

Addresses where Zachary P. Thielen is enrolled with Medicare (CMS data updated October 2, 2026).

• 1830 Wells St, Suite 103Wailuku, HI 96793 (808) 649‑1487

Group practices

Medicare enrollment lists Zachary P. Thielen as a member of this group (CMS data updated October 2, 2026).

• Maui Orthopedic Institute LLC2 clinicians in the group

Specialties

• Orthopedic Surgeryprimary

Find other Orthopedic Surgery doctors in Hawaii →

Other orthopedic surgeons in Wailuku

Clinicians with the same Medicare primary specialty in Wailuku, HI — not a recommendation.

• Kenneth W. Smith, DO
• Warren V. Ayers, MD
• Kimberley M. Wirsing, MD
• David J. Kaufman, MD
• James A. Ferrier, MD
• Robert A. Burri, MD
• Jonathan-James T. Eno, MD

All orthopedic surgeons in Wailuku →

Other clinicians in Maui Orthopedic Institute LLC

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

• Emily Newman, PA

Clinician information

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