Stefan F. Klein, MD

Medicare activity in 2024

Official CMS public-use data for Stefan F. Klein, 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. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)524 services
2. Injection, triamcinolone acetonide, not otherwise specified, 10 mg (J3301)289 services
3. New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)181 services
4. Imaging guidance for procedure, 60 minutes or less (76000)165 services
5. Injection into tendon or ligament (20550)129 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%
• Arthritis69%
• High blood pressure60%
• Anxiety20%
• Diabetes18%
• Depression18%

Hospitals where Stefan F. Klein works

Medicare's Facility Affiliation Data lists Stefan F. Klein 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.

• Dominican HospitalSanta Cruz, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050242
• Hazel Hawkins Memorial HospitalHollister, CA · Critical Access Hospital · Emergency services: listed by Medicare · CCN 051337

Practice locations

Addresses where Stefan F. Klein is enrolled with Medicare (CMS data updated October 2, 2026).

• 3143 Paul Sweet RdSanta Cruz, CA 95065 (831) 462‑4801
• 911 Sunset DrHollister, CA 95023

Group practices

Medicare enrollment lists Stefan F. Klein as a member of this group (CMS data updated October 2, 2026).

• Hazel Hawkins Memorial Hospital52 clinicians in the group

Specialties

• Orthopedic Surgeryprimary
• Hand Surgeryalso

Find other Orthopedic Surgery doctors in California →

Other orthopedic surgeons in Santa Cruz

Clinicians with the same Medicare primary specialty in Santa Cruz, CA — not a recommendation.

• Eric Hohn, MD
• James D. Spiegel, MD
• Neil M. Richman, MD
• Karl J. Christoffersen, MD

All orthopedic surgeons in Santa Cruz →

Other clinicians in Hazel Hawkins Memorial Hospital

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

• Mike Baker, PA
• Hongguang Liu, MD
• Carol T. Mei, MD
• Sarathy T. Mandayam, MD
• Ghulam Moheyuddin, MD
• Jamie L. Salas

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