Dr. Zachary Hadley, M.D.

Orthopedic Surgery
14 procedures 3 hospitals Redlands, CA
Latest available Medicare data — updated April 2026

Contact & Location

1901 W Lugonia Ave
Redlands, CA 92374
NPI: 1750596631
Credentials: M.D.
Active Medicare provider
Find Practice on Google Maps
Shoulder replacement recovery kit Slings, cold therapy, and adaptive clothing for recovery
National Comparison by Procedure
Shoulder 14 vs 29 avg (2,213 surgeons)

Dr. Zachary Hadley is a board-certified orthopedic surgeon practicing in Redlands, California. Dr. Hadley has performed 14 Medicare-verified shoulder replacements, ranking #110 in California.

In California, Dr. Hadley performs below average in shoulder (14 vs 31 avg).

Dr. Hadley's Medicare data shows a focused shoulder replacement practice with 14 verified procedures. Surgeons who concentrate on a single procedure type often develop deep procedural expertise, though total practice volume may include additional procedures not captured in Medicare fee-for-service data.

Redlands is home to 5 orthopedic surgeons in the current Medicare dataset. Patients in the Redlands area can compare surgeon volume and procedure specialization to find the right fit for their joint replacement needs.

Dr. Hadley first appears in the Medicare dataset in 2024. With 1 year of recorded data, the longitudinal trend is still developing.

Dr. Hadley's 14 shoulder replacement procedures is below the national average of 29 among 2,213 surgeons. Medicare data captures roughly a third of all joint replacements, so actual volume is likely higher.

Verified Medicare Cases

Shoulder Replacement
14 verified cases
#110 in California
Estimated total: 40 – 40 procedures (all insurers)
Based on Medicare FFS representing 33–37% of national joint replacement volume
How is this estimated?

Medicare Part B fee-for-service claims represent approximately 33–37% of all joint replacements performed nationally (source: CMS data, AJRR). This range estimates the surgeon's total practice volume across all payers. The verified Medicare count above is the definitive, audited figure.

How Dr. Hadley Compares

Procedure volume compared to the California state average.

Shoulder Below Avg
14 Avg: 31
Dr. Hadley California Average

Hospital Affiliations & Quality

H
Redlands Community Hospital
3/5
Redlands, CA
Similar to national avg
H
St Bernardine Medical Center
3/5
San Bernardino, CA
Similar to national avg
H
Arrowhead Regional Medical Center
2/5
Colton, CA
Low case volume

Quality ratings and complication rates are hospital-level metrics from CMS Hospital Compare and do not reflect individual surgeon performance. Star ratings updated quarterly. Complication data covers a rolling 3-year period.

Patient Resources: Preparing for Shoulder Replacement

If you are considering shoulder replacement surgery, these evidence-based guides can help you prepare and recover:

Shoulder Replacement Recovery Overview

Recovery timelines vary by patient, but here is a general overview of what to expect after shoulder replacement surgery:

Week 1-3 Arm in a sling for protection. Gentle pendulum exercises under therapist guidance. Focus on pain management and wound care.
Week 4-6 Gradual sling weaning. Begin passive and active-assisted range-of-motion exercises. Light daily activities resume.
Week 7-12 Active range-of-motion exercises. Light strengthening begins. Most patients can drive and perform desk work.
Month 4-6 Progressive strengthening continues. Return to most activities. Full recovery may take 6-12 months for complete shoulder strength.

Individual recovery varies based on overall health, age, and adherence to physical therapy. View full shoulder replacement recovery guide and product recommendations

Frequently Asked Questions About Dr. Hadley

How does Dr. Hadley's procedure volume compare to other California surgeons?

Dr. Hadley has performed 14 Medicare-verified joint replacement procedures. The California average is 68 procedures per surgeon. Medicare data captures roughly one-third of all joint replacements, so total volume may be higher. Dr. Hadley ranks #551 out of 613 orthopedic surgeons in California.

What types of joint replacement does Dr. Hadley perform?

Dr. Hadley's reported Medicare volume is focused on shoulder replacement, with 14 verified procedures. Some surgeons choose to concentrate on a single joint type to build deep procedural expertise.

Are there other orthopedic surgeons near Dr. Hadley in Redlands?

Yes. There are 5 orthopedic surgeons in Redlands in the current Medicare dataset. Patients can compare procedure volumes and specializations to choose the surgeon who best fits their needs. Use the state page to view all California surgeons.

What does the Medicare data for Dr. Hadley represent?

The procedure counts shown are based on the most recent Medicare Part B fee-for-service claims data, published by the Centers for Medicare and Medicaid Services (CMS). This captures approximately 33–37% of all joint replacements performed nationally. Dr. Hadley's total practice volume — including private insurance and Medicare Advantage patients — is likely higher than the 14 procedures shown here.

Which hospitals is Dr. Hadley affiliated with?

According to CMS facility affiliation data, Dr. Hadley is affiliated with Redlands Community Hospital, St Bernardine Medical Center, Arrowhead Regional Medical Center.

How does Dr. Hadley compare to other orthopedic surgeons in Redlands?

Among the 5 orthopedic surgeons in Redlands, Dr. Hadley ranks #4 by total Medicare procedure volume. The highest-volume surgeon in Redlands has 71 verified Medicare procedures.

What are the quality ratings for hospitals where Dr. Hadley practices?

Redlands Community Hospital (3 out of 5 CMS stars, hip/knee complication rate similar to national average); St Bernardine Medical Center (3 out of 5 CMS stars, hip/knee complication rate similar to national average); Arrowhead Regional Medical Center (2 out of 5 CMS stars, insufficient case volume for complication rate comparison). These are hospital-level quality metrics from CMS Hospital Compare and do not reflect individual surgeon outcomes.

Other Orthopedic Surgeons in Redlands, California

Dr. Hadley's 14 Medicare procedures are below the Redlands average of 29. The table below compares verified procedure volumes for orthopedic surgeons practicing in Redlands.

SurgeonProceduresSpecialties
Dr. Peter Elsissy 71 Hip, Knee
Dr. Grigor Grigoryan 33 Hip, Knee
Dr. Jason Chan 14 Knee
Dr. James Stewart 12 Knee

Patient Resources & Verification

Research reviews, verify credentials, and check official quality data through these trusted sources:

Medicare Care Compare and NPI Registry are official U.S. government sources. Google reviews reflect user-submitted feedback. OrthoProcedures.com does not verify the accuracy of third-party review content.

Cite This Data

APA: OrthoProcedures. (2026). Dr. Zachary Hadley, M.D. -- Orthopedic Surgeon Profile. Retrieved from https://orthoprocedures.com/surgeons/ca/dr-zachary-hadley-redlands.html

Link: https://orthoprocedures.com/surgeons/ca/dr-zachary-hadley-redlands.html

Data source: CMS Medicare Part B Provider Utilization & Payment Data. Full methodology | Open Data API

Important: Rankings are based solely on Medicare procedure volume and do not reflect quality of care, patient outcomes, or procedures covered by private insurance. This data represents approximately one-third to 40% of all joint replacement procedures nationwide. Always consult with healthcare providers to make informed decisions about your care.