Articulation Disorder: Types, Causes, Examples, ICD-10 Codes and Treatment

Quick answer: An articulation disorder is a type of speech sound disorder in which a person cannot physically produce one or more speech sounds correctly, even though they know exactly which word they want to say. A child who says "wabbit" for "rabbit," a teenager with a lisp on every "s," and an adult who still says "dis" for "this" are all common examples. Articulation disorders are diagnosed by a speech-language pathologist (SLP) and are highly treatable with targeted practice, at any age.

If you landed here from a search for a speech problem, you are in the right place. At the World Stop Stuttering Association, we spend our days helping people who want to stop stuttering, and many of the families and adults who come to us ask a closely related question: "Is what I am dealing with stuttering, or is it an articulation problem?" The two are different conditions, but they share one important feature. Both are speech patterns held in the brain, which means both can change. Our online stuttering therapy programs are built on the neuroscience method, which treats speech habits as learned brain patterns that calm, structured practice can rewire. This guide explains what an articulation disorder is, the four error types, how sounds normally develop by age, causes, examples, diagnosis, ICD-10 and DSM-5 codes, treatment, and what to do next, whether you are a parent or an adult.

In this guide:

• What an articulation disorder is (and is not)

• The four types of errors (SODA)

• Articulation disorder examples, by age and by sound

• Causes and risk factors

• Articulation vs phonological disorder vs apraxia vs dysarthria

• Diagnosis, ICD-10 and DSM-5 codes

• Treatment options, including brain-based practice

• Articulation disorder in adults

• Frequently asked questions

What Is an Articulation Disorder?

An articulation disorder is difficulty producing speech sounds because of how the tongue, lips, teeth, jaw, and palate move. The person understands language, chooses the right word, and knows what the word should sound like. The motor act of making the sound is what goes wrong.

Key facts:

• It is a speech sound disorder. Speech sound disorders have two broad groups: articulation (motor-based errors on specific sounds) and phonological (pattern-based errors that affect whole groups of sounds). Many people have features of both. See our guide to phonological disorder for the second group.

• It is not a sign of low intelligence. Articulation difficulty is independent of IQ.

• It is not stuttering. Stuttering disrupts the flow and timing of speech through repetitions, prolongations, and blocks. Articulation disorders change the sounds themselves. If you are unsure which applies, read stuttering symptoms and speech disfluencies, then compare.

• It can start in childhood and last into adulthood if the pattern is never corrected.

• It is one of the most common reasons children are referred for speech therapy.

Some articulation errors are a normal stage of learning to talk. A three-year-old who says "wabbit" is on track. A ten-year-old who still says it is not, and deserves an assessment.

The 4 Types of Articulation Errors (SODA)

Speech-language pathologists group articulation errors into four categories, remembered as SODA: Substitution, Omission, Distortion, and Addition.

1. Substitution: one sound is replaced by another.

• "wed" for "red" (w for r)

• "tat" for "cat" (t for k, also called fronting)

• "dis" for "this" (d for th)

• "thoup" for "soup" (th for s)

2. Omission: a sound is left out.

• "poon" for "spoon" (the s is dropped)

• "ca" for "cat" (the final consonant is dropped)

• "nana" for "banana" (a whole syllable is dropped)

3. Distortion: the sound is attempted but comes out wrong, so it sounds "off" rather than like a different sound. A lisp is the best-known distortion. The tongue pushes forward or air escapes over the sides, and the "s" sounds slushy or whistly. For a full breakdown, see lisp in speech and how to fix a lisp.

4. Addition: an extra sound is inserted.

• "buhlack" for "black"

• "puhlay" for "play"

All children make some of these errors while learning to talk. It becomes an articulation disorder when errors continue past the age when most children have mastered the sound, or when they make speech hard for others to understand.

Articulation Disorder Examples

Real examples make the condition easier to recognize.

In young children

• A 5-year-old who says "tar" for "car" or "tup" for "cup"

• A 6-year-old who drops the ends of words, saying "ba" for "bath" or "ca" for "cat"

• A child whose speech is hard for anyone outside the family to follow

In school-age children and teens

• An 8-year-old with a frontal lisp on every "s" and "z"

• A 10-year-old who still says "wabbit," "wight," or "wun" for words with /r/

• A teenager who cannot produce a clean "r" and avoids words like "restaurant," "around," or "Robert"

In adults

• Someone with a lifelong lisp who is asked to repeat themselves on phone calls

• An adult who says "dis" and "dat," or "free" for "three"

• A professional who avoids saying their own name or certain job titles because of a hard sound

A note on the "thirty-three" question. People often ask whether mispronouncing a phrase like "thirty-three" means they have an articulation disorder. One slip, or a phrase that is simply tricky, is not a disorder. "Thirty-three" combines a "th" with an r-colored vowel and two stressed syllables, which is hard for many speakers, especially when tired, nervous, or speaking quickly. It points to a possible articulation issue only when the same substitution or distortion happens consistently, across many words, and affects how well others understand you.

Articulation Disorder by Sound

Some sounds are more likely to cause trouble because the tongue movements are precise.

• /r/ ("wabbit" for "rabbit"): one of the most common and most persistent errors. It has many tongue shapes and is often among the last sounds to be mastered.

• /s/ and /z/ (lisps): includes frontal lisps (tongue pushes between the teeth) and lateral lisps (air escapes over the sides of the tongue).

• /th/ ("dis" for "this," "fink" for "think"): later-developing, and often improves with age or short, targeted therapy.

• /l/ ("wight" for "light," "yeg" for "leg"): usually corrected earlier than /r/.

• /sh/, /ch/, /j/ ("sip" for "ship"): these require careful tongue placement, and some children need extra time.

• /k/ and /g/ ("tat" for "cat," "doe" for "go"): known as fronting, normal in toddlers, but should fade by age 3 to 4.

For more drills by sound, explore s-words speech therapy and tongue twisters for speech therapy.

When Should Children Master Each Sound?

Norms vary slightly between studies, but speech-language pathologists generally expect the following pattern. Our speech sound development chart gives the full picture.

• By about age 3: /p/, /b/, /m/, /n/, /h/, /w/, and most vowels. Strangers understand roughly three quarters of what the child says.

• By about age 4: /t/, /d/, /k/, /g/, /f/, /y/. Speech is mostly understandable to unfamiliar listeners.

• By about age 5 to 6: /l/, /s/, /z/, /sh/, /ch/, /j/, and most blends begin to settle.

• By about age 6 to 8: /r/ and /th/ are often the last to arrive.

If your child is noticeably behind these ranges, or if you simply cannot understand them, read signs your child needs speech therapy and child speech development, then book an evaluation. Early help is easier than late help.

Causes of Articulation Disorder

In many children no single cause is found. The common contributors are:

• Developmental: the child's motor coordination for speech is simply maturing more slowly.

• Structural differences: cleft lip or palate, tongue-tie, high palate, missing or misaligned teeth, or orthodontic changes.

• Hearing loss: a child with chronic ear infections or hearing loss cannot reliably copy sounds they do not hear well. A hearing test for toddler speech delay is a standard first step.

• Neurological or motor conditions: conditions such as cerebral palsy, or acquired brain injury, that affect speech muscles.

• Functional (no clear physical cause): the incorrect pattern became habit. This is the most common type, and the one most responsive to retraining.

• Family history: speech sound disorders sometimes run in families.

Pacifier use, bilingual exposure, and screen time are often blamed, but the evidence is more nuanced. See do pacifiers cause speech delays and does bilingualism cause language delay for what research actually says.

How the Brain Builds (and Rebuilds) Speech Sounds

Speaking is one of the most complex motor skills humans perform. Every word requires the tongue, lips, jaw, soft palate, breath, and voice to coordinate within fractions of a second. The brain stores this coordination as a motor program. When a child practices "r" incorrectly for years, the incorrect program becomes the automatic one. You can learn more about the regions involved in what part of your brain controls speech.

This is exactly why articulation disorders respond to practice. Neuroplasticity means the brain can replace old motor programs with new ones. Research and clinical experience point to the same ingredients: accurate feedback, many correct repetitions, and low stress during practice. Children tend to change fastest, but adults can retrain long-standing patterns too. Our neuroplasticity exercises guide explains the principles in plain language.

This is the foundation of the neuroscience method we teach. It was built for stuttering, and our programs apply it to fluency. The underlying idea, that speech habits are learned brain patterns and calm, structured practice can change them, is also the reason a person with an articulation disorder can often make big gains with focused, relaxed daily work alongside traditional speech therapy. To be clear, an articulation disorder should be assessed and treated by a licensed speech-language pathologist. Brain-based practice supports that work; it does not replace it.

Articulation Disorder vs Phonological Disorder vs Apraxia vs Dysarthria

These four terms get mixed up constantly. Here is the difference.

• Articulation disorder: errors on specific sounds because of motor production difficulty. Example: only /r/ or /s/ is affected. Everything else is clear.

• Phonological disorder: errors follow rules or patterns across many sounds. Example: a child drops all final consonants, or replaces all back sounds (k, g) with front sounds (t, d). Read more in phonological disorder.

• Childhood apraxia of speech (CAS): a motor planning problem. The brain struggles to send the correct movement plan, so errors are inconsistent, speech sounds choppy, and the same word can come out differently each time. See childhood apraxia of speech and apraxia vs speech delay.

• Dysarthria: weak, slow, or uncoordinated speech muscles caused by neurological damage, producing slurred or mumbled speech. See dysarthria and slurred speech and stuttering.

An assessment sorts out which one, or which combination, applies, because the best treatment is different for each.

For a wider overview of terms, see types of speech impediments and speech therapy for speech impediment.

Developmental vs Functional Articulation Disorder

• Developmental articulation disorder: the child is behind age norms for certain sounds with no identifiable cause. This is the most common presentation and usually responds quickly to therapy.

• Functional articulation disorder: a learned, habitual error pattern that has become automatic, often with no structural or neurological reason. It may take longer to shift because the habit is stronger, but the outlook is good.

Both respond best to early assessment and consistent home practice.

Severe Articulation Disorder

A disorder is considered severe when speech is so unclear that unfamiliar listeners cannot understand the person, or when many sounds are affected. Children in this group often need more intensive therapy, sometimes several sessions a week, plus strong parent involvement. Severe presentations can overlap with childhood apraxia of speech, hearing loss, autism, or developmental language disorder. See intensive speech therapy and autism spectrum speech therapy.

How Articulation Disorder Is Diagnosed

A speech-language pathologist (read what is an SLP and speech pathologist vs speech therapist) typically evaluates:

1. Case history: developmental milestones, ear infections, family history, feeding history.

2. Hearing screening: to rule out hearing loss as a cause.

3. Oral-motor exam: structure and movement of the lips, tongue, jaw, teeth, and palate.

4. Standardized articulation test: the person names pictures or reads words so every sound is tested in the beginning, middle, and end of words.

5. Connected speech sample: to hear how errors show up in conversation and how understandable the speech is.

6. Stimulability testing: can the person produce the sound correctly with a model or cue? Good stimulability usually predicts faster progress.

Need help finding someone? See how to find a speech therapist.

Articulation Disorder ICD-10 and DSM-5 Codes

For insurance, school reports, and clinical records, these are the codes people usually ask about.

• F80.0, Phonological disorder (ICD-10-CM): this is the code most commonly used for articulation and speech sound disorders in children, and it includes functional speech articulation disorder, lisping, and lalling in the ICD-10 classification.

• R47.89, Other speech disturbances: sometimes used when speech problems are documented without a specific developmental diagnosis.

• DSM-5, Speech Sound Disorder: a persistent difficulty with speech sound production that interferes with intelligibility or communication, with onset in the early developmental period and not explained by hearing, congenital, or neurological conditions. It maps to F80.0.

Coding practices differ by clinic and payer, so confirm the code with your speech-language pathologist and insurer. For coverage questions see insurance coverage for speech therapy and how much does speech therapy cost. For the fluency equivalent, see the ICD-10 code for stuttering.

Articulation Disorder Treatment

Treatment works. Most children with a straightforward articulation disorder make clear progress with the right approach, and many are discharged from therapy. The main approaches are:

1. Traditional articulation therapy. The SLP teaches one sound at a time through a ladder: the sound alone ("sss"), then syllables ("sa," "se"), then words, then phrases, sentences, reading, and finally spontaneous conversation. Each step is mastered before moving on.

2. Auditory discrimination training. The person learns to hear the difference between the correct sound and their error, a skill that is surprisingly often missing.

3. Minimal pairs. Practicing word pairs that differ by one sound ("sip" and "ship," "rake" and "wake") so the person experiences why the sound matters for meaning.

4. Placement and sensory-motor cues. Using mirrors, tactile cues, tongue-posture instruction, and descriptions of where the tongue should be. Related reading: tongue posture to speak easier and oral motor exercises for speech therapy. Note that the research on non-speech oral-motor exercises alone is mixed, so they work best alongside actual sound practice.

5. Biofeedback. Visual tools such as ultrasound or spectrogram feedback show the person what their tongue is doing, and have helped some people with stubborn /r/ errors.

6. Cycles and phonological approaches. For children whose errors follow patterns across many sounds, SLPs may use cycles or contrast-based therapy.

7. Daily home practice. This is where most of the progress happens. Five to ten focused minutes a day beats one long weekly session. See how to do speech therapy at home, activities for speech therapy, talking games for better speech, and our articulation starter kit.

8. Calm, brain-based practice. The nervous system learns new motor patterns best when it feels safe. Slow breathing before practice (box breathing, progressive muscle relaxation), unhurried repetition, and recording yourself (listening to your own voice) all support the process. This is the same principle behind our neuroscience method.

How long does it take? It depends on the sound, the age, how many sounds are affected, and how consistently the person practices. Simple sounds can resolve in weeks to a few months. /r/ and complex patterns often take longer. See how long does speech therapy take and how long does it take to break a habit.

Therapy at school. In the US, children who qualify can receive services through an IEP. See IEP goals for speech therapy and pediatric speech therapy.

Bilingual families. Speech sound development can look different across languages. Learn more in bilingual speech therapy.

Speech Articulation Disorder in Adults

Many adults live with an articulation disorder they never had treated, most often a lifelong lisp, an /r/ problem, or a "th" substitution. Typical signs include:

• Being asked to repeat yourself, especially on phone calls

• Avoiding words or names with a difficult sound

• Choosing synonyms to dodge a sound (a habit related to circumlocution)

• Feeling self-conscious in meetings, interviews, or presentations

The good news is that adults can improve. The pattern is more automatic than in a child, so it takes more deliberate, consistent practice, but adults bring strengths children lack: motivation, self-monitoring, and the ability to understand tongue placement instructions. Many adults see meaningful change with an SLP and short daily practice sessions. If your goal is clearer speech at work, also see how to speak clearly, how to stop mumbling and speak clearly, voice warm-up exercises, and accent modification.

When adult speech changes suddenly, it is not an articulation disorder. New slurred speech, a drooping face, weakness, or confusion can be a stroke or another medical emergency. Call emergency services immediately. Longer-term changes after a stroke or injury are handled by therapists who specialize in speech therapy for stroke patients and speech therapy for brain injury.

If a speech difference has dented your confidence, you are not alone. The emotional side is similar to what people who stutter describe; read how stuttering affects confidence and how to rebuild it and how to let go of shame when speaking.

Do Children Outgrow Articulation Disorders?

Some do. Errors on late-developing sounds like /r/, /l/, and /th/ often resolve on their own up to about age 6 to 8. But a child who is still making many errors, is hard to understand, or who is aware of and frustrated by their speech should not simply be left to wait. Waiting can allow the incorrect pattern to harden, and it can affect confidence, reading and spelling, and social participation. If in doubt, ask for a screening. It is quick and low-risk.

Is Articulation Disorder a Disability?

It can be, in an educational sense. In the United States, a speech or language impairment is one of the categories under the Individuals with Disabilities Education Act (IDEA), and a child with an articulation disorder that affects learning or participation in school may qualify for services. Mild cases may not qualify but can still benefit from private therapy. For related questions, see is stuttering a disability.

Frequently Asked Questions

What are examples of articulation disorders?

Common examples include "wabbit" for "rabbit" (substitution), "poon" for "spoon" (omission), a lisp on /s/ (distortion), and "buhlack" for "black" (addition).

What are the 4 types of articulation disorders?

Substitution, omission, distortion, and addition, known together as SODA.

Can an articulation disorder be cured?

Most articulation disorders can be corrected or substantially improved with speech therapy and consistent practice. Outcomes depend on cause, severity, and how early therapy begins. The word "cured" is rarely used clinically, but many people reach fully clear speech.

What is the difference between articulation disorder and phonological disorder?

Articulation disorders involve difficulty physically producing specific sounds. Phonological disorders involve patterns of errors across groups of sounds. They are often grouped together as speech sound disorders.

Is articulation disorder the same as a speech impediment?

"Speech impediment" is an everyday term that covers articulation problems, stuttering, voice problems, and more. An articulation disorder is one specific type.

Is a lisp an articulation disorder?

Yes. A lisp is a distortion of /s/ and /z/ and falls under articulation disorders.

What causes articulation disorder in adults?

Most often it is a childhood pattern that was never corrected. In adults, new changes may also come from dental work, hearing loss, or neurological conditions, which need medical evaluation.

What is the ICD-10 code for articulation disorder?

F80.0 (phonological disorder, which includes functional speech articulation disorder) is the most common. R47.89 is sometimes used for other speech disturbances.

At what age should I worry about articulation?

Speak to an SLP if a child over 3 is hard for strangers to understand, if sounds expected by their age are still missing, if they get frustrated when speaking, or if errors persist beyond early school age.

Can online therapy help with articulation?

Often yes. Many SLPs deliver articulation therapy through video, with parent coaching and daily home practice. For a comparison, see online vs in-person therapy: which is more effective.

How can I practice at home?

Short daily sessions of 5 to 10 minutes using the exact sounds, words, and cues from your SLP work best. Use mirrors, recordings, and games, and keep sessions positive.

Can stuttering and an articulation disorder occur together?

Yes. Some people have both, and the evaluation will treat each separately. If fluency is also a concern, see how to treat stuttering and cluttering vs stuttering.

Next Steps

1. Get an assessment: A licensed SLP will identify which sounds are affected, why, and what to do about it.

2. Start short daily practice: Consistency matters more than length.

3. Practice calmly: A relaxed nervous system learns faster.

4. Be patient and keep going: The brain changes with repetition.

If stuttering or fluency is also part of your story, the WSSA team can help you build a plan for confident, fluent speech.

Final Thoughts

Articulation disorders are common, well understood, and very treatable. Whether it is your child's missing "r," your own lifelong lisp, or a stubborn "th," the path is the same: assess, practice with purpose, and give the brain time to build a new pattern. Speech is learned, and what is learned can be relearned.