The goal of this multi-center observational study is to collect long-term clinical outcome information for anatomic and reverse total shoulder arthroplasty (shoulder replacement).

The study is a non-randomized, multi-center prospective registry that will collect standard-of-care data for patients who plan to receive or have received shoulder arthroplasty (anatomic or reverse) with a Shoulder Innovations (SI) Total Shoulder System device and consent to participate in the study. The study will evaluate short and long term clinical and radiographic outcomes associated with real-world use of the arthroplasty system from the implant procedure through 10 years post-operatively.

Inclusion Criteria:

1. At least 18 years of age.
2. Plan to receive or has received a shoulder arthroplasty surgical procedure, with a minimum of one implanted Shoulder Innovations (SI) device component and be willing and able to complete post-operative visits as long as at least one SI device component remains implanted.
3. Able to provide informed consent prior to enrollment in the study (unless a waiver has been obtained).
4. Agree to and be able to consistently answer the specified Patient Reported Outcome Measures (PROM) pre-operatively and at each of the post-operative visits without the use of a translator.
5. Willing and able to comply with the requirements of the study protocol

Exclusion Criteria:

1. Participation in a clinical trial of an investigational drug or device that would confound the results of this trial. Participation in another observational registry is allowed provided there are no conflicting requirements to this trial.
2. Incarceration.
3. Any conditions, co-morbidities, restrictions, or obligations that would prohibit them from complying with the requirements of this study protocol.

Adult patients (at least 18 years of age) of any gender undergoing a shoulder arthroplasty for any diagnosis/condition with at least one SI Total Shoulder System component enrolled at participating sites