HI

1. HCPCS Level II modifier that may be used with CPT or HCPCS Level II codes indicating an integrated mental health and mental retardation/developmentally disabled program. This modifier may be required for state Medicaid programs, so check with your state guidelines. 2. Medicare Part A; see hospital insurance .

HIAA

Abbreviation for Health Insurance Association of America, which is now known as America’s Health Insurance Plans (AHIP) . See America’s Health Insurance Plans (AHIP) .

Hierarchy

Numerical order of diagnostic codes in which each digit beyond three digits adds information. See Box H-3 .Box H-3ALPHANUMERICAL CODES FOR ICD-10-CMFRACTURE OF UPPER LIMB (810-819)810 Fracture of clavicleIncludes: collar boneinterligamentous part of clavicleThe following fifth-digit subclassification is for use with category 810:0 unspecified partClavicle NOS1 sternal end of clavicle2 shaft of clavicle3 acromial end of clavicle 810.0ICD-10-CMS42.00 Closed fracture of clavicleS42.001 Closed fracture of right clavicleS42.002 Closed fracture of left clavicleS42.009 Closed fracture of clavicle, unspecified side