Welcome to

Posada Surgery Center

Committed to providing high quality, patient-centered, cost effective outpatient surgery on the Central Coast

Offering innovative

Same-day total joint replacement procedures

Have your joint replacement surgery and return to the comfort of home all in the same day.

Take advantage of

State-of-the-art techniques

Posada Surgery Center offers innovative outpatient treatments allow patients to get in, out, and on with their lives.

Offering an

Alternative to
hospital-based care

Posada Surgery Center offers cost-effective, high quality, convenient alternatives for many outpatient procedures.

Posada Surgery Center

Proudly offering quality care, specialized equipment, and advanced outpatient surgery on the Central Coast.

In for care. Home for comfort.

Offering patients easy access to comfortable and efficient same-day outpatient surgical services, using the most advanced, minimally-invasive surgical procedures in the United States.

Office Hours


06:30am - 06:30pm


06:30am - 06:30pm


06:30am - 06:30pm


06:30am - 06:30pm


06:30am - 06:30pm





Why choose Posada Surgery Center?

Posada Surgery Center offers same-day surgical care across a variety of specialties. Designed with your convenience in mind, Posada Surgery Center combines the expertise of some of the Central Coast’s most respected surgeons with advanced technology and personalized care. The result is a comfortable, patient-focused environment free of the hassles often associated with hospital-based care.


For many routine procedures, the patient experience is improved if the patient is treated at an outpatient surgery center rather than at a complicated medical center or hospital. At Posada Surgery Center, patients benefit from going directly home after their procedure, minimizing time away from everyday life.

Minimally invasive procedures

Doctor owned and operated

Comfortable & personal

State-of-the-art equipment

Top Central Coast surgeons

Convenient scheduling

A variety of outpatient surgery procedures


Specializing in all areas including joint replacement, sports medicine, carpal tunnel, shoulder, and knee surgeries. Learn more

Women’s Health

Minimally invasive procedures for stress incontinence, fibroid, laparoscopic hysterectomy and other female GYN problems Learn more


Featuring the latest in cataract surgery, implants, glaucoma surgery, and strabismus treatment. Learn more

General surgery

Including hernias, biopsies, hemorrhoids, laparoscopic, vascular, and gall bladder surgery. Learn more

Pain management

Providing anesthesia and relief from pain caused by back and neck problems, cancer, shingles and other chronic syndromes. Learn more

Meet our outpatient surgeons

The skilled doctors at Posada Surgery Center cover a broad array of medical specialties. You’ll find them warm, friendly, compassionate, and easy to talk to. On top of that, they’re supported by a skilled, knowledgeable, and welcoming nursing and administrative staff committed to making your experience at Posada Surgery Center a great one.

Why outpatient care?


Why should I choose Posada over a hospital?

Posada Surgery Center is known for its efficiency of care, quality outcomes, and low cost of treatment. Outpatient surgery is our specialty, and we have an established reputation for excellence in all that we do.

How long will I be at Posada following my procedure?

Post-operative recovery time varies from patient to patient and from procedure to procedure. After your procedure, a nurse will monitor your vital signs and make sure you are alert and stable. You will be sent home as soon as your doctor determines it is safe to discharge you from the facility. For many procedures, patients are on their way home just a few hours after their surgery.

Can I drive home following my procedure?

Regardless of the type of procedure you undergo, you will not be allowed to drive yourself home following your treatment. This is due to the anesthesia associated with your procedure, which takes time to wear off and will prevent you from operating a vehicle at full function.

What insurance do you accept?

Posada Surgery Center accepts the following insurance plans:


  • Aetna Plans PPO/ HMO/ POS
  • BCBS Federal Employee Program
  • Blue Choice
  • Blue Shield
  • Blue Cross
  • CareFirst
  • Cigna
  • Corvel
  • Health Net
  • Medicare
  • Tricare
  • United Healthcare


For more information about payment and insurance, click here.

Meet Dr. Sima

Managing Partner, Posada Surgery Center

I’m Dr. William Sima, and I would like to welcome you to Posada Surgery Center. We take great pride in offering residents of the Central Coast innovative outpatient procedures performed by some of the top surgeons in California. We are changing the model for surgery and surgery recovery by providing a relaxing environment with high-quality, individual care aimed at getting you home as soon as possible. Click through our doctor profiles to get to know the surgeons practicing here, and if you have any questions, please feel free to give us a call.

About Posada Surgery Center

Designed exclusively for outpatient surgery, our modern facility allows patients to receive outpatient surgery in a safe, comfortable environment, rather than a hospital setting. Our surgery center has four state-of-the-art operating rooms and one procedure room dedicated to pain management procedures. Individual patient rooms provide privacy for patients and their family members prior to and following their outpatient surgical procedure.

Your home for personalized care

Our multi-specialty surgical facility was established in 2003 and performs approximately 1,500 to 2,000 procedures per year. Patients from across California come to Posada Surgery Center for:


Same-day surgeries
Cost savings
Our 98% satisfaction rate
Easy-to-schedule procedures
Our facility’s next-to-zero infection rates

What our patients say

Check out our online reviews below; or if you have been to Posada Surgery Center, please let us know what you thought. We strive to provide patients a warm and caring environment and take patient comments seriously.

“Highly recommend Posada Surgery Center. Dr. Sima and his staff are incredible. Very personable. Lots of attention. Willing to answer all your questions. Superb alternative to hospital stay.”

-Judy Bedell

“Excellent care. Very clean and orderly. Staff is nice and medical faculty were excellent. Plus, I even received a refund I did not even know I was due. That was a huge shock! Would definitely go back.”

-G. Smith

Newsweek named Posada Surgery Center one of America’s Best Ambulatory Surgery Centers in 2021. Thank you to the Posada Surgery Center community!

Work again. Live again. Call Posada Surgery Center today 805-591-3344

Get back to normal at the premier outpatient surgery center on the Central Coast