apraxia

DEFINITION of apraxia

apraxia is a neurological disorder affecting motor cognition, planning, and task execution in which a person is unable to carry out learned or purposeful movements despite having the physical ability and willingness to do so, and despite intact basic motor function, sensation, and comprehension. It differs from paralysis and paresis, which involve a loss of motor strength, and from ataxia, which involves incoordination — in apraxia the motor pathway is intact but the brain cannot correctly plan or sequence the movement. The underlying mechanism involves disruption to cortical motor association areas, most often in the left parietal lobe or supplementary motor cortex, impairing the “programs” that translate intentions into organized motor acts. Apraxia can be physiological in the context of normal developmental motor acquisition (childhood apraxia of speech) or pathological as an acquired condition following stroke, traumatic brain injury, dementia, or neurodegenerative disease. Clinically relevant subtypes most commonly encountered in coding include ideomotor apraxia (inability to perform single gestures on command; associated with stroke — I63.9), ideational apraxia (inability to sequence multi-step tasks; associated with dementia — F02.80), limb-kinetic apraxia (loss of dexterity in individual limb movements), and apraxia of speech/verbal apraxia (R48.2, G31.87 for PPAOS). Apraxia is commonly confused with aphasia, which is a language disorder (coded R47.01 or R47.02) — the key distinction is that aphasia affects language formulation and comprehension while apraxia affects the physical execution or planning of movement or speech acts.

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ETYMOLOGY of apraxia

greek

Component	Origin	Meaning
a- / an-	Greek a- / an- (ah / an)	“without,” “not,” “absence of” — negating prefix (alpha privative); a- before consonants, an- before vowels
prax-	Greek praxis (PRAX-is), from prassein (PRAS-sein)	“action,” “doing,” “practice,” “use” — combining form denoting purposeful action or skilled activity
-ia	Greek -ia (ee-ah)	Noun-forming suffix — “state or condition of” — used to denote a pathological state or disorder

The word entered English in the 1870s as apraxia (noun), borrowed from New Latin apraxia, from Greek a- (not) + praxis (action) — literally “state of not acting” or “without purposeful movement.” The adjective form apraxic appeared shortly afterward in clinical neurology literature. The root praxis (“purposeful action”) connects Apraxia to the entire -praxia ROOT FAMILY: dyspraxia (dys- + praxis → disordered action), parapraxia (para- + praxis → beside/faulty action; Freudian slips), and ecopraxia (echo + praxis → imitative/mirroring action). The alpha privative a- is extraordinarily productive in medical terminology: aphasia, agnosia, ataxia, amnesia, anesthesia.

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🔀 ALIASES / ALTERNATE TERMS

• Apraxic (adjective form — clinical collocations include “apraxic gait,” “apraxic agraphia,” “apraxic dysarthria”)
• Dyspraxia (lay and clinical synonym; often used in pediatric/developmental contexts, especially in the UK; coded under R48.2 when unspecified or F82 for developmental coordination disorder)
• Verbal Apraxia / Apraxia of Speech (AOS) (disorder of speech motor planning — inability to sequence the movements needed for spoken words; coded R48.2 unless PPAOS-specific — see G31.87)
• Ideomotor Apraxia (inability to perform a single learned gesture on command — e.g., “wave goodbye” — despite understanding the request; most common subtype; coded under R48.2)
• Ideational Apraxia (inability to sequence a multi-step motor task — e.g., making coffee; associated with bilateral or diffuse cortical damage and dementia; coded under R48.2)
• Limb-Kinetic Apraxia (loss of fine motor dexterity in individual limb movements; motor acts are clumsy and imprecise; coded under R48.2)
• Constructional Apraxia (inability to copy drawings or assemble objects; associated with right parietal lesions; coded under R48.2)
• Oculomotor Apraxia (inability to make voluntary eye movements on command; associated with Balint syndrome and cerebellar pathology; coded H51.8)
• Childhood Apraxia of Speech (CAS) (developmental — not acquired — motor speech disorder; diagnosed in children; coded F80.0 for phonological disorder or R48.2 per clinical guidance)
• Primary Progressive Apraxia of Speech (PPAOS) (progressive neurodegenerative form — FY2026 new code — G31.87; isolated, slowly worsening speech motor planning deficits without broader aphasia or dementia initially)
• Dressing Apraxia (inability to dress oneself due to spatial disorientation; associated with right parietal lesions; coded under R48.2)
• Gait Apraxia (inability to initiate or sequence walking movements despite intact motor/sensory function; associated with normal pressure hydrocephalus — G91.2)

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🔗 RELATED TERMS

• Aphasia — the opposite in domain: affects language (formulation, comprehension, word retrieval) rather than movement execution; coded R47.01 (expressive) or R47.02 (receptive); commonly coexists with apraxia of speech post-stroke, which creates a critical coding distinction
• Dysarthria — shares the prax- / motor speech domain; differs in that dysarthria involves execution weakness or incoordination of speech muscles (R47.1), while apraxia involves planning and sequencing — the muscles themselves are not weak in apraxia
• Agnosia — shares the a- (alpha privative) prefix; inability to recognize sensory inputs despite intact sensory function — often coexists with apraxia in parietal lobe lesions; coded R48.1
• ataxia — shares the a- prefix and neurological motor domain; characterized by incoordination of voluntary movement due to cerebellar dysfunction — unlike apraxia, ataxia involves sensorimotor coordination, not motor planning; coded R27.0
• Stroke / Cerebral Infarction — most common acquired cause of ideomotor and verbal apraxia; I63.9 (unspecified) through site-specific codes; apraxia resulting from stroke is coded as an additional manifestation, sequenced after the underlying CVA code
• Dementia — underlying mechanism for ideational apraxia in advanced stages; codes such as F02.80 (dementia in other diseases, without behavioral disturbance) are sequenced first with R48.2 as additional
• Traumatic Brain Injury (TBI) — acquired cause of apraxia; sequencing follows TBI code first with manifestations additional; common inpatient profee scenario
• Normal Pressure Hydrocephalus — classic triad includes gait apraxia (G91.2); important to recognize the triad: gait apraxia + urinary incontinence + dementia
• Developmental Coordination Disorder (DCD) — the pediatric developmental analog to acquired apraxia; motor learning disorder coded F82; distinct from CAS (which is speech-specific)
• Primary Progressive Apraxia of Speech (PPAOS) — new FY2026 neurodegenerative entity (G31.87); falls under the Pick disease / frontotemporal degeneration spectrum; isolated progressive motor speech planning deficit
• Praxis — the root concept: purposeful, learned, skilled action; praxis assessment is the neuropsychological testing framework used to diagnose apraxia type and severity
• Motor Planning — the cognitive-neural process disrupted in all apraxia subtypes; involves premotor and supplementary motor cortex, parietal association cortex, and basal ganglia circuits

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CODING CORNER

🏥 ICD-10-CM CODES

Apraxia NOS | Symbolic Dysfunction Category (R48.–)

Code	Description
R48.2	Apraxia — billable, unspecified (NOS); used for ideomotor, ideational, limb-kinetic, verbal/speech apraxia when no more specific code applies
R48.-	Dyslexia and other symbolic dysfunctions — parent/category code; NOT billable on its own

Primary Progressive Apraxia of Speech | FY2026 New Code

Code	Description
G31.87	Primary progressive apraxia of speech (PPAOS) — NEW FY2026 billable code; neurodegenerative, progressive isolated motor speech planning disorder; falls within Pick disease / frontotemporal degeneration spectrum

Oculomotor Apraxia | Eye Movement Apraxia

Code	Description
H51.8	Other specified disorders of binocular movement — used for oculomotor apraxia when no more specific eye movement code applies

Gait Apraxia | Normal Pressure Hydrocephalus

Code	Description
G91.2	Normal pressure hydrocephalus — classic triad includes gait apraxia; sequence G91.2 first; gait apraxia coded as manifestation

Developmental Coordination Disorder | Pediatric / Developmental Apraxia Analog

Code	Description
F82	Developmental coordination disorder (DCD) — developmental/childhood motor planning disorder; analog to acquired apraxia in pediatric coding
F80.0	Phonological disorder — used for childhood apraxia of speech (CAS) in many clinical coding scenarios per ASHA guidance

Underlying Causes — Sequence First (Etiology-Manifestation)

Code	Description
I63.9	Cerebral infarction, unspecified — most common acquired cause of apraxia; sequence first, R48.2 additional
F02.80	Dementia in other diseases classified elsewhere, unspecified severity, without behavioral disturbance — sequence first for dementia-associated apraxia
S09.90XA	Unspecified injury of head, initial encounter — TBI as cause of acquired apraxia; sequence injury first

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🔧 COMMON CPT CODES (Apraxia-Related Diagnosis & Treatment)

CPT Code	Description
92523	Evaluation of speech sound production (e.g., articulation, phonological process, apraxia, dysarthria); with evaluation of language comprehension and expression — most comprehensive SLP eval code for apraxia workup
92522	Evaluation of speech sound production (e.g., articulation, phonological process, apraxia, dysarthria); speech sound disorder only — without language component
92507	Treatment of speech, language, voice, communication, and/or auditory processing disorder; individual — primary treatment code for apraxia of speech therapy sessions
92508	Treatment of speech, language, voice, communication, and/or auditory processing disorder; group (2 or more individuals) — group therapy setting for apraxia treatment
92521	Evaluation of speech fluency (e.g., stuttering, cluttering) — used when fluency components complicate the apraxia picture
96105	Assessment of aphasia (includes assessment of nonverbal communication), per hour — used when concurrent aphasia evaluation needed alongside apraxia; commonly paired in post-stroke workup
96125	Standardized cognitive performance testing (e.g., Ross Information Processing Assessment) per hour of a qualified health care professional’s time, both face-to-face time administering tests to the patient and time interpreting these test results and preparing the report — used when cognitive/neuropsych screening accompanies apraxia evaluation
97129	Therapeutic interventions that focus on cognitive function (e.g., attention, memory, reasoning, executive function, problem solving, and/or pragmatic functioning) and compensatory strategies to manage the performance of an activity; initial 15 minutes — used in OT context for ideational/limb apraxia rehabilitation
97130	Therapeutic interventions that focus on cognitive function and compensatory strategies; each additional 15 minutes — add-on to 97129 for extended apraxia rehabilitation sessions
92526	Treatment of swallowing dysfunction and/or oral function for feeding — used when oral/buccofacial apraxia affects swallowing and oral feeding function
92609	Therapeutic services for the use of speech-generating augmentative and alternative communication (AAC) device — used for PPAOS or severe AOS patients requiring AAC as primary communication strategy

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⚠️ Coding Note: For inpatient profee coding, R48.2 is the go-to code for apraxia NOS, but always investigate whether a more specific etiology-manifestation pair applies — if the physician documents apraxia due to cerebrovascular disease or dementia, the underlying condition (e.g., I63.9, F02.80) must be sequenced first with R48.2 as the additional manifestation code per ICD-10-CM etiology-manifestation convention. Starting FY2026, G31.87 is the correct code for Primary Progressive apraxia of Speech (PPAOS) — do NOT continue defaulting to R48.2 when the documentation clearly supports a progressive neurodegenerative speech apraxia presentation, as PPAOS falls under the frontotemporal degeneration spectrum. Watch for the documentation phrase “difficulty with purposeful movements” or “unable to perform on command” — this should prompt a physician query to clarify apraxia vs. weakness vs. ataxia, as these are separately coded and clinically distinct. On inpatient profee claims, when apraxia of speech coexists with aphasia post-stroke, both R48.2 and the aphasia code (R47.01 or R47.02) may be reportable if separately documented — do not let one swallow the other. For SLP-billed CPT codes under Medicare Part B, the -GN modifier is required on all speech therapy procedure codes (92507, 92523, etc.) to designate services provided under a speech-language pathology plan of care.

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DERIVATIONS of apraxia

TABLE definition AS Definition
FROM #medterm 
WHERE length(filter(roots, (word) => econtains([[Apraxia]].roots, word))) > 0 AND file.name != [[Apraxia]].file.name
SORT file.name ASC

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Query functionality

TABLE definition AS Definition
FROM #medterm 
WHERE length(filter(definition, (word) => econtains([[Apraxia]].definition, word))) > 0 AND file.name != [[Apraxia]].file.name

Med roots dictionary Appendix A Prefixes Appendix B Combining Forms Appendix C Suffixes Appendix D Suffix forms