O & P Abbreviated Codes

The following are provided for general informational purposes only. Abbreviations may differ from that presented below. If you have any questions about the abbreviations below or our Educational Courses, please use our Contact Form to contact us.

Orthotic Product Abbreviations:

  • A/S = Arch Supports (same as FO)
  • AFO = Ankle Foot Orthotic
  • AO = Ankle Orthosis
  • Arizona AFOTM  = A Leather Gauntlet Style of AFO
  • Boston OrthosisTM  = Type of TLSO
  • CASH = Cruciform Anterior Spinal Hyperextension Orthosis
  • Chair Back = Type of LSO
  • CO = Cervical Orthosis (i.e. soft cervical, Miami-J, Philly collars)
  • CROW = Charcot Retaining Orthotic Walker
  • CTLSO = Cervical-Thoracic-Lumbro-Sacral Orthotic (i.e. Milwaukee Brace, Boston)
  • CTO = Cervical-Thoracic Orthotic
  • DAFO = Dynamic Ankle Foot Orthotic
  • EO = Elbow Orthosis
  • EWHO = Elbow Wrist Hand Orthosis
  • FO = Foot Orthotic or Finger Orthosis
  • HFO = Hand Finger Orthosis
  • HKAFO = Hip Knee Ankle Foot Orthotic
  • HO = Hip Orthosis or Hand Orthosis
  • Jewitt Hyperextension Brace = A TLSO Devised by Dr. E. L. Jewett, Florida
  • KAFO = Knee Ankle Foot Orthotic
  • KO = Knee Orthotic
  • Lerman Minerva Orthosis = Type of CTO
  • LS Corset = Lumbro-Sacral Corset (a soft back brace)
  • LSO = Lumbro-Sacral Orthotic
  • Milwaukee Brace = Type of CTLSO
  • Oregon Orthotic System (OOS) = Lower Extremity Orthotic System
  • PLS = Posterior Leaf Splint/Spring (a low level AFO for foot drop)
  • PRAFO = Pressure Relief Ankle Foot Orthosis
  • PTB = Patella Tendon Bearing Orthosis (used to unweight the ankle/foot)
  • RGO = Reciprocating Gait Orthosis = a bilateral HKAFO orthosis
  • Scottish Rite OrthosisTM = TLSO Named for Texas Scottish Rite Hospital for Children
  • SEO = Shoulder Elbow Orthosis
  • SMO = Supramalleolar Orthosis
  • SO = Sacral Orthosis
  • SOMI = Sternal-Occipital-Mandibular Immobilizer
  • SWASH = Standing Walking and Sitting Hip Orthosis
  • TLSO = Thoracic-Lumbro-Sacral Orthotic
  • UCB or UCBL = University California Berkley Laboratories (a high level A/S)
  • WHFO = Wrist Hand Finger Orthosis
  • WHO = Wrist Hand Orthosis
  • WO = Wrist Orthosis


Orthotic & Prosthetic Terms:

  • AE (AEA) = Above Elbow Amputation (trans-humeral)
  • AK (AKA) = Above Knee Amputation (trans-femoral)
  • BE (BEA) = Below Elbow Amputation (trans-radial)
  • (BIL) or (B) = Bilateral, meaning two sides (right and left)
  • BK (BKA) = Below Knee Amputation (trans-tibial)
  • Congenital = From Birth
  • CP = Cerebral Palsy
  • CVA = Cerebrovascular Accident (stroke)
  • Dx = Diagnosis
  • FX = Fracture
  • HD = Hip Disarticulation
  • hemi = One-Half
  • Hx = History
  • IPOP =  Immediate Postoperative Prosthesis
  • KD = Knee Disarticulation
  • Lumbago = Back Pain
  • MVA = Motor Vehicle Accident
  • OA = Osteoarthritis
  • OTS = Off the Shelf (premade, not custom)
  • Pes Cavus = Exaggerated High Arches
  • Pes Planus = Flat Foot
  • PVD = Peripheral Vascular Disease
  • RA = Rheumatoid Arthritis
  • ROM = Range of Motion
  • Rx = Written Prescription
  • SD = Shoulder Disarticulation
  • Symes = Ankle Disarticulation
  • TBI = Traumatic Brain Injury
  • Unilateral = Meaning One Side Only


Prosthetic Product Abbreviations:

  • C-Leg  = Microprocessor-controlled hydraulic knee from Otto Bock
  • Dynamic Response Foot = Flex Foot, Renegade, Axion DP
  • Harmony System = Elevated Vacuum Suspension Socket
  • MAS = Above Knee Socket Design by Marlo Ortiz used at MeritCare HealthCare Accessories.
  • Multi Axial Foot = Collage Park, Gressinger Foot, or C-Walk
  • Myoelectric Arm = An upper extremity prosthesis powered by a battery and controlled by electrodes.
  • Proprio Foot = Microprocessor Controlled Foot from Ossur
  • PTB = Patella Tendon Bearing Prosthesis
  • Rheo Knee = Microprocessor Controlled Knee from Ossur
  • S.A.C.H. Foot = Solid Ankle Cushion Heel
  • TSB = Total Surface Bearing Design