• Treat Your Feet
    Complete Foot and Ankle Care

Welcome to Five Cities Foot & Ankle, a podiatrist practice located in Pismo Beach and Santa Maria, CA

We want all our patients to be informed decision makers and fully understand any health issues you may face. That is why we have developed a website loaded with valuable information about podiatry and podiatric problems and treatments. We encourage you to visit this site whenever you have concern about your foot or ankle.

Our website provides you with information about our providers, office hours, maps & directions to our Pismo Beach & Santa Maria office and other useful information. We know how hectic life can be and are committed to making our practice convenient and accessible. We want you to feel confident that you are working with doctors and other professionals who are qualified, experienced and caring.

Please take a few moments to look through this site to get a better feel for Five Cities Foot & Ankle's capabilities and services. Podiatrists at Five Cities Foot & Ankle have been providing excellence in podiatry services in Pismo Beach, Santa Maria and the surrounding areas for over 15 years. Our exceptional physicians and staff are trained to address issues associated with bunions, diabetic wound care, foot & ankle pain, plantar fasciitis (heel pain), and most other problems of the foot and ankle. Call our office today to request an appointment or ask any questions. Thank you. 

Meet Our Physicians

Learn Who We Are

  • Dr.
    Byron N. Collier

    Dr. Collier is a triple board-certified fellowship-trained foot and ankle surgeon. His mission is to provide superior comprehensive foot and ankle care. He is on staff at French Hospital, Arroyo Grande Hospital, Marian Medical Center, Plaza Surgery Center, Coastal Surgical Institute, Twin Cities Hospital, and serves the US veteran’s community at the VA Clinic in Santa Maria.

    Raised in Connecticut, Dr. Collier earned his bachelor’s degree in Chemistry with departmental honors, cum laude at Southern Connecticut State University. Dr. Collier earned his medical degree from Western University of Health Sciences (WesternU) in Pomona, California. He graduated summa cum laude and first in his class. 

    Dr. Collier completed a three-year Podiatric Medicine and Surgery Residency and earned Reconstructive Rearfoot and Ankle Certification at Mount Auburn, a Harvard Medical School teaching hospital, and Tufts Medical Center. His training involved exposure to all aspects of foot and ankle surgery, including total ankle replacement. He served as Chief Resident Surgeon for his final year of training, participated in research publications, served as peer-review editor for multiple journals and presented original research findings at the Annual Scientific Conference of the American College of Foot and Ankle Surgeons. 

    In 2019, Dr. Collier completed advanced surgical training through a Fellowship at Duke University Medical School, Durham, North Carolina, within the Division of Foot and Ankle in the Department of Orthopedics. While at Duke, he participated in research publications and presented at regional and national conferences on topics of Charcot Arthropathy and Total Ankle Replacement. Dr. Collier also received additional training in microsurgery and plastic surgery techniques for the foot and ankle.

    Dr. Collier takes great joy in serving his patients and community. He strictly adheres to the principles of focused and patient-centered care, knowing the best outcomes are only possible when both the patient and physician work as a team. Dr. Collier and his wife have a 2 year old girl and newborn boy. He enjoys spending time with his extended family in Los Olivos, swimming, and golfing in his free time.

    ABFAS Board Certified in Foot Surgery and Reconstructive Rearfoot & Ankle Surgery

    Board Certified, American Board of Podiatric Medicine

    Fellow of the American College of Foot and Ankle Surgeons

  • Dr.
    Brian O'Carroll
    Center of Excellence Surgeon for Lapiplasty 3D Bunion Correction

    Dr. Brian O’Carroll was born and raised in Chicago, Illinois. Dr. O’Carroll attended Western Michigan University, he majored in Biomedical Sciences with a Minor in Chemistry and Physics, he graduated in 1993. He then attended Dr. William M. Scholl College of Podiatric Medicine and earned his DPM degree in 1997. He went on to complete an extensive two-year podiatric surgical residency program in trauma and reconstructive foot procedures in Chicago, Illinois at The Venerated Mercy Hospital and Medical Center.

    Dr. O’Carroll remained on Faculty at Mercy Hospital until his decision to move to the West Coast. In January of 2008 Dr. O’Carroll moved out to the Central Coast with his wife, Meghan, and began his podiatric career with Dr. Steve Clark. Dr. O’Carroll and his wife have two boys, Tommy (10) and Declan (9), who keep them very busy on his days he is not working. Dr. O’Carroll is on staff at French Hospital, Arroyo Grande Community Hospital, Marian Medical Center, and Coastal Surgical Institute.

    Dr. O’Carroll is Board Certified by the American Board of Foot and Ankle Surgery and is a Fellow of the American College of Foot and Ankle Surgeons. Dr. O’Carroll has a special interest in sports medicine injuries of the foot and ankle, and diabetic wound care. He has pursued specialty training in reconstructive procedures, such as Lapiplasty for Bunion Repair, and is one of the leading performers of this operation on the West Coast.

    Dr. O’Carroll is committed to providing his patients with quality podiatric medical care.

  • Dr.
    Steve Clark

    Dr. Steve Clark is a graduate of the University of Michigan and California College of Podiatric Medicine.

    He completed a surgical residency and a fellowship in reconstructive limb surgery at Kern Hospital and Medical Center in Warren MI.

    Dr. Clark has been practicing on the Central Coast since 2001 and is on staff at French Hospital, Arroyo Grande Community Hospital, Marian Medical Center, and Coastal Surgical Institute. He has a special interest in wound care and diabetic limb preservation/salvage.

    He is a member of the American Board of Wound Management and a Certified Wound Specialist – Physician.

Featured Articles

Read about helpful topics

  • Fracture-Toe

    The structure of the foot is complex, consisting of bones, muscles, tendons, and other soft tissues. Of the 26 bones in the foot, 19 are toe bones (phalanges) and metatarsal bones (the long bones in the midfoot). Fractures of the toe and metatarsal bones are common and require evaluation by a specialist. ...

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  • Posterior Tibial Tendon Dysfunction (PTTD)

    What Is PTTD?The posterior tibial tendon serves as one of the major supporting structures of the foot, helping it to function while walking. Posterior tibial tendon dysfunction (PTTD) is a condition caused by changes in the tendon, impairing its ability to support the arch. This results in flattening ...

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  • Heel Pain (Plantar Fasciitis)

    Heel pain is most often caused by plantar fasciitis, a condition that is sometimes also called heel spur syndrome when a spur is present. Heel pain may also be due to other causes, such as a stress fracture, tendonitis, arthritis, nerve irritation, or, rarely, a cyst. Because there are several potential ...

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  • Flexible Flatfoot

    What Is Flatfoot? Flatfoot is often a complex disorder, with diverse symptoms and varying degrees of deformity and disability. There are several types of flatfoot, all of which have one characteristic in common: partial or total collapse (loss) of the arch.   Other characteristics shared by most ...

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  • Ganglion Cyst

    What Is a Ganglion Cyst? A ganglion cyst is a sac filled with a jellylike fluid that originates from a tendon sheath or joint capsule. The word “ganglion” means “knot” and is used to describe the knot-like mass or lump that forms below the surface of the skin.   Ganglion cysts are among ...

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  • Webbed Toes

    Webbed toes (also known as syndactyly) is a rare condition seen in approximately one in 2,000 births. Those with this condition have two or more toes that are partially or fully joined by a flexible skin bridge.  Syndactyly most commonly affects the second and third toes, but it can occur between ...

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  • Weak Ankles

    Weak ankles may be a result of previous ankle injuries, but in some cases they are a congenital (at birth) condition. The ankles are sore, and “give way” easily while standing, walking, or doing other activities. When an ankle is injured, it may take a few weeks to many months to fully heal. Often, ...

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  • Varicose Veins

    Varicose veins are usually due to improperly functioning valves within the veins. The veins typically appear prominent or look "raised."  The condition can cause swelling of the legs, ankles, and feet. The skin may become discolored due to leakage of blood into the surrounding tissues, and ulcers may ...

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  • Turf Toe

    What is Turf Toe? Turf toe is a sprain of the big toe joint resulting from injury during sports activities. The injury usually results from excessive upward bending of the big toe joint. The condition can be caused from either jamming the toe, or repetitive injury when pushing off repeatedly when running ...

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  • Toe Walking

    Toe walking, a condition in which a person walks on the toes or ball of the foot, is most often seen in young children learning to walk. A child who does not outgrow toe walking in early childhood should be evaluated by a foot and ankle surgeon. Toe walking may be idiopathic (habitual) or it can be caused ...

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What Our Clients Say About Us

    Dr. Collier Replaced my entire left ankle one year ago..Today I walk normal and my new ankle feels wonderful--I have zero pain-the ankle feels like its normal with full range of motion--I've been hiking and walking on the beach every day..Dr. Collier is a very nice person..Very personable and answers all my questions with compassion and so easy to talk too..His staff is top notch the ladies are so nice and always greet me with a smile.

    Brian C.

    My toe hurt for ever Dr O’Carroll did surgery and my toe is done! No more pain! He went even on to help me see another Doctor for something else!! I would not go anywhere else!!

    Susie S.

    Dr. Collier is knowledgeable and thorough in his approach. He took time to explain everything and provide real, reasonable solutions for care. I was very pleased with the office, staff and Dr. Collier.

    Ericka S.


Hours of Operation


9:00 am-5:00 pm


9:00 am-5:00 pm


9:00 am-5:00 pm


9:00 am-5:00 pm


9:00 am-5:00 pm