Dr. William Pennington, MD

Orthopedic Surgery
54 procedures 3 hospitals Franklin, WI
Latest available Medicare data — updated April 2026

Contact & Location

Phone: 414-325-4320
Practice phone listed in the NPI registry
3111 W Rawson Ave
Franklin, WI 53132
NPI: 1114021110
Credentials: MD
Active Medicare provider (NPI verified)
20 years of practice experience
Licensed MD
Licensed surgical specialist
Board-certified orthopedic surgeon
Contact information available
Find Practice on Google Maps
Shoulder replacement recovery kit Slings, cold therapy, and adaptive clothing for recovery
National Comparison by Procedure
Shoulder 54 vs 29 avg (2,213 surgeons)

Dr. William Pennington is a board-certified orthopedic surgeon practicing in Franklin, Wisconsin. A Medicare provider since 2006, Dr. Pennington has performed 54 Medicare-verified shoulder replacements, ranking #3 in Wisconsin.

In Wisconsin, Dr. Pennington performs well above average in shoulder (54 vs 25 avg).

Dr. Pennington's Medicare data shows a focused shoulder replacement practice with 54 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.

Beyond general orthopedic surgery, Dr. Pennington holds additional credentials in Sports Medicine, reflecting subspecialty training that may benefit patients with complex joint conditions.

Dr. Pennington is the only orthopedic surgeon in Franklin represented in the current Medicare dataset, serving as the primary local option for patients considering joint replacement surgery in the area.

Dr. Pennington's Medicare record spans 12 years from 2013 through 2024. Procedure volume has remained consistent during that period, ranging from 40 to 65 procedures per year, reflecting a steady joint replacement practice.

Among 2,213 shoulder replacement surgeons tracked nationally, Dr. Pennington's 54 verified procedures is above the national average of 29.

Verified Medicare Cases

Shoulder Replacement
54 verified cases
#3 in Wisconsin
Estimated total: 150 – 160 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. Pennington Compares

Procedure volume compared to the Wisconsin state average.

Shoulder Very High
54 Avg: 25
Dr. Pennington Wisconsin Average

Volume Trend Analysis

Dr. Pennington's procedure volume has been consistent across 12 years of Medicare data, ranging from 40 to 65 procedures per year. This stability suggests a well-established joint replacement practice.

Years of Data 12
2024 Volume 54
Peak Volume 65 (2014)
Trend Stable

Hospital Affiliations & Quality

H
Midwest Orthopedic Specialty Hospital
Franklin, WI
Similar to national avg
H
Ascension Se Wisconsin Hospital - St Joseph Campus
4/5
Milwaukee, WI
Similar to national avg
H
Orthopaedic Hospital Of Wisconsin
Glendale, WI
Similar to national avg

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. Pennington

How does Dr. Pennington's procedure volume compare to other Wisconsin surgeons?

Dr. Pennington has performed 54 Medicare-verified joint replacement procedures. This is in line with the Wisconsin average of 51 procedures per surgeon. Dr. Pennington ranks #72 out of 189 orthopedic surgeons in Wisconsin.

What types of joint replacement does Dr. Pennington perform?

Dr. Pennington's reported Medicare volume is focused on shoulder replacement, with 54 verified procedures. Some surgeons choose to concentrate on a single joint type to build deep procedural expertise.

How experienced is Dr. Pennington with shoulder replacement surgery?

Dr. Pennington ranks #3 in Wisconsin for shoulder replacement with 54 Medicare-verified procedures. This high ranking among 189 state surgeons indicates significant experience with this specific procedure.

Where is Dr. Pennington's practice located?

Dr. Pennington practices in Franklin, Wisconsin. The office is located at 3111 W Rawson Ave, Franklin, WI 53132. Patients in the surrounding area can consult Dr. Pennington for joint replacement evaluation.

What does the Medicare data for Dr. Pennington 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. Pennington's total practice volume — including private insurance and Medicare Advantage patients — is likely higher than the 54 procedures shown here.

Has Dr. Pennington's procedure volume changed over time?

Dr. Pennington's procedure volume has been relatively stable over 12 years of Medicare data, ranging from 40 to 65 procedures per year between 2013 and 2024. Consistent volume over multiple years reflects a steady joint replacement practice.

Which hospitals is Dr. Pennington affiliated with?

According to CMS facility affiliation data, Dr. Pennington is affiliated with Midwest Orthopedic Specialty Hospital, Ascension Se Wisconsin Hospital - St Joseph Campus, Orthopaedic Hospital Of Wisconsin.

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

Midwest Orthopedic Specialty Hospital (hip/knee complication rate similar to national average); Ascension Se Wisconsin Hospital - St Joseph Campus (4 out of 5 CMS stars, hip/knee complication rate similar to national average); Orthopaedic Hospital Of Wisconsin (hip/knee complication rate similar to national average). These are hospital-level quality metrics from CMS Hospital Compare and do not reflect individual surgeon outcomes.

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. William Pennington, MD -- Orthopedic Surgeon Profile. Retrieved from https://orthoprocedures.com/surgeons/wi/dr-william-pennington-franklin.html

Link: https://orthoprocedures.com/surgeons/wi/dr-william-pennington-franklin.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.