# ICD-11 Classification of Hypotonia (Low Muscle Tone)

Canonical: https://pinnacleblooms.org/ask/what-is-the-icd-11-classification-for-hypotonia-low-muscle-tone
Publisher: Pinnacle Blooms Network / Bharath Healthcare Laboratories Private Limited

In ICD-11, hypotonia is classified as a clinical sign (MB47.4 Hypotonia) under symptoms and signs of the musculoskeletal system — a manifestation, not a diagnosis. The underlying central, peripheral, genetic or metabolic cause must be coded separately, and ICF describes its functional impact on posture, feeding and motor milestones.

*Hypotonia is a clinical sign, not a diagnosis in itself — and ICD-11 codes it accordingly.*

## In short
In ICD-11, hypotonia (low muscle tone) is classified under the chapter on **symptoms, signs or clinical findings of the musculoskeletal system**, coded as **MB47.4 Hypotonia** within the broader "Symptoms, signs or clinical findings, not elsewhere classified" structure. Crucially, ICD-11 treats it as a *manifestation*, not an aetiological diagnosis — the underlying cause (central, peripheral, genetic, metabolic or syndromic) must be coded separately. Where hypotonia is congenital and benign, the descriptor **"benign congenital hypotonia"** is used clinically, but the coding still points to the sign plus its established cause.

## The classification, in practice
ICD-11 deliberately separates the *sign* of reduced muscle tone from its origin, which keeps coding precise:

- **The sign** — code the hypotonia (MB47.4) when low tone is the presenting finding under evaluation.
- **The cause** — add the relevant aetiological code: e.g. neuromuscular disorders, central nervous system conditions, chromosomal or genetic syndromes (Down syndrome, Prader-Willi), or metabolic disease.
- **Functioning** — ICD-11 pairs naturally with the WHO ICF framework to describe the *functional impact* of hypotonia on posture, feeding, gross-motor milestones and self-care, which is what therapy actually targets.

This matters clinically because hypotonia in an infant is a gateway sign: the coding hierarchy nudges the clinician toward localising the lesion (central versus peripheral) and pursuing the cause rather than stopping at the descriptive label.

## When to escalate
Acute or rapidly progressive hypotonia, hypotonia with respiratory or feeding compromise, loss of previously acquired tone or milestones, or a floppy neonate all warrant **prompt paediatric neurology referral**, not a therapy-first pathway. Stable, longstanding low tone with preserved strength is appropriately managed with developmental therapy alongside aetiological work-up.

## The Pinnacle way
A clinical AbilityScore® and any diagnosis are established **only at a Pinnacle Blooms Network centre, under qualified clinician care** — never from an online form. For a child with low tone, our clinicians map the functional impact across motor, feeding and self-care domains and build a graded plan through [occupational therapy](https://www.pinnacleblooms.org/best-occupational-therapy-center-india-proven-improvement-rate) and [physiotherapy](/physiotherapy), with the [AbilityScore® as the shared baseline](/ask/what-is-the-abilityscore-and-how-is-it-calculated) for measuring progress. Explore the [full network](/).

## Trusted sources
WHO ICD-11 for Mortality and Morbidity Statistics (symptoms and signs of the musculoskeletal system); WHO International Classification of Functioning, Disability and Health (ICF) for the functional framing of muscle-tone disorders.

**Next step —** Reviewing a child with persistent low tone? [Partner with a Pinnacle clinician](https://www.pinnacleblooms.org/best-occupational-therapy-center-india-proven-improvement-rate) to baseline functional impact and co-ordinate the aetiological pathway.

## Sources
- WHO ICD-11 for Mortality and Morbidity Statistics: https://icd.who.int/
- WHO ICF framework for functioning and disability: https://www.who.int/standards/classifications/international-classification-of-functioning-disability-and-health

## Connected topics and perspectives
- Conditions: https://pinnacleblooms.org/ask/conditions
- Doctor: https://pinnacleblooms.org/ask/lens/stakeholder/doctor
- Motor: https://pinnacleblooms.org/ask/lens/domain/motor
- Definition: https://pinnacleblooms.org/ask/lens/intent/definition
- Screen: https://pinnacleblooms.org/ask/lens/lifecycle/screen
- Occupational Therapy: https://pinnacleblooms.org/ask/lens/route/occupational-therapy
- Early Clarity: https://pinnacleblooms.org/ask/lens/empowerment/early_clarity

## Related question paths

### Understand the subject
- What is Hypotonia and its ICD-11 features in early childhood?: https://pinnacleblooms.org/ask/what-is-hypotonia-low-muscle-tone-and-what-are-its-icd-11-features-in-early-childhood
- Hypotonia across ICF functioning domains in early childhood: https://pinnacleblooms.org/ask/which-icf-functioning-domains-does-hypotonia-low-muscle-tone-affect-in-early-childhood
- SNOMED CT Concept for Hypotonia (Low Muscle Tone): https://pinnacleblooms.org/ask/what-is-the-snomed-ct-concept-for-hypotonia-low-muscle-tone
- Is Hypotonia (Low Muscle Tone) Considered a Disability?: https://pinnacleblooms.org/ask/is-hypotonia-low-muscle-tone-considered-a-disability
- How Hypotonia (Low Muscle Tone) Affects a Child's Daily Life: https://pinnacleblooms.org/ask/how-does-hypotonia-low-muscle-tone-affect-a-child-s-daily-life
- Is Hypotonia (Low Muscle Tone) Genetic or Hereditary?: https://pinnacleblooms.org/ask/is-hypotonia-low-muscle-tone-genetic-or-hereditary
- What are common myths about Hypotonia (Low Muscle Tone)?: https://pinnacleblooms.org/ask/what-are-common-myths-about-hypotonia-low-muscle-tone
- What are the types or levels of Hypotonia (Low Muscle Tone)?: https://pinnacleblooms.org/ask/what-are-the-types-or-levels-of-hypotonia-low-muscle-tone
- What causes hypotonia (low muscle tone) in children?: https://pinnacleblooms.org/ask/what-causes-hypotonia-low-muscle-tone-in-children
- Early Intervention Outcomes in Childhood Hypotonia: https://pinnacleblooms.org/ask/what-does-current-research-show-about-early-intervention-outcomes-for-hypotonia-low-muscle-tone-in-children-under-7
- What is Hypotonia (Low Muscle Tone)?: https://pinnacleblooms.org/ask/what-is-hypotonia-low-muscle-tone
- What is Hypotonia (Low Muscle Tone), and what does it look like in early childhood?: https://pinnacleblooms.org/ask/what-is-hypotonia-low-muscle-tone-and-what-does-it-look-like-in-early-childhood

### Recognise signs & concerns
- Clinical Red Flags for Hypotonia Warranting Referral: https://pinnacleblooms.org/ask/what-clinical-red-flags-for-hypotonia-low-muscle-tone-warrant-referral-in-a-young-child
- Early Indicators of Hypotonia for Paediatricians: https://pinnacleblooms.org/ask/what-early-indicators-of-hypotonia-low-muscle-tone-should-a-paediatrician-watch-for
- When should a doctor refer a child with suspected hypotonia for developmental therapy?: https://pinnacleblooms.org/ask/when-should-a-doctor-refer-a-child-with-suspected-hypotonia-low-muscle-tone-for-developmental-therapy
- Can Hypotonia (Low Muscle Tone) Be Cured?: https://pinnacleblooms.org/ask/can-hypotonia-low-muscle-tone-be-cured
- Can Hypotonia (Low Muscle Tone) Be Prevented?: https://pinnacleblooms.org/ask/can-hypotonia-low-muscle-tone-be-prevented
- Do Boys Show Hypotonia (Low Muscle Tone) Differently?: https://pinnacleblooms.org/ask/do-boys-show-hypotonia-low-muscle-tone-differently
- Hypotonia in Girls: https://pinnacleblooms.org/ask/do-girls-show-hypotonia-low-muscle-tone-differently
- How a Frontline Health Worker Can Spot Possible Hypotonia Early: https://pinnacleblooms.org/ask/how-can-a-frontline-health-worker-spot-a-child-with-possible-hypotonia-low-muscle-tone-early
- Worried About Your Child's Low Muscle Tone?: https://pinnacleblooms.org/ask/should-i-be-worried-my-child-might-have-hypotonia-low-muscle-tone
- Early Signs of Hypotonia (Low Muscle Tone): https://pinnacleblooms.org/ask/what-are-the-early-signs-of-hypotonia-low-muscle-tone
- Early Signs of Hypotonia (Low Muscle Tone) in a 1-Year-Old Boy: https://pinnacleblooms.org/ask/what-are-the-early-signs-of-hypotonia-low-muscle-tone-in-a-1-year-old-boy
- Early Signs of Low Muscle Tone (Hypotonia) in a 1-Year-Old Girl: https://pinnacleblooms.org/ask/what-are-the-early-signs-of-hypotonia-low-muscle-tone-in-a-1-year-old-girl

### Explore causes & influences
- Contributing factors for hypotonia in early childhood: https://pinnacleblooms.org/ask/what-are-the-known-contributing-factors-for-hypotonia-low-muscle-tone-in-early-childhood
- Are boys more likely to have low muscle tone?: https://pinnacleblooms.org/ask/are-boys-more-likely-to-have-hypotonia-low-muscle-tone
- Are girls more likely to have hypotonia?: https://pinnacleblooms.org/ask/are-girls-more-likely-to-have-hypotonia-low-muscle-tone
- Early Intervention for Hypotonia: Advancing UNCRPD & the SDGs: https://pinnacleblooms.org/ask/how-does-early-intervention-for-hypotonia-low-muscle-tone-advance-un-child-rights-uncrpd-and-the-sdgs
- What causes hypotonia (low muscle tone) in young children?: https://pinnacleblooms.org/ask/what-causes-hypotonia-low-muscle-tone-in-young-children
- Cost-effectiveness of early therapy for hypotonia: https://pinnacleblooms.org/ask/what-is-the-cost-effectiveness-of-early-therapy-for-hypotonia-low-muscle-tone-in-young-children
- Hypotonia prevalence and public-health burden in India: https://pinnacleblooms.org/ask/what-is-the-prevalence-and-public-health-burden-of-hypotonia-low-muscle-tone-among-young-children-in-india

### Understand assessment
- Recommended Screening & Diagnostic Pathway for Childhood Hypotonia: https://pinnacleblooms.org/ask/what-is-the-recommended-screening-and-diagnostic-pathway-for-hypotonia-low-muscle-tone-in-children-under-7
- How AbilityScore Tracks Progress in a Child with Hypotonia: https://pinnacleblooms.org/ask/how-does-abilityscore-track-progress-in-a-child-with-hypotonia-low-muscle-tone
- How is hypotonia assessed in a young child?: https://pinnacleblooms.org/ask/how-is-hypotonia-low-muscle-tone-assessed-in-a-young-child
- How Is Hypotonia Assessed in Children Under 7?: https://pinnacleblooms.org/ask/how-is-hypotonia-low-muscle-tone-assessed-in-children-under-7
- What an AbilityScore® of 0–100 Means for a Child with Hypotonia: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-0-100-mean-for-a-child-with-hypotonia-low-muscle-tone
- What an AbilityScore of 100–200 Means for a Child with Hypotonia: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-100-200-mean-for-a-child-with-hypotonia-low-muscle-tone
- What an AbilityScore® of 200–300 Means for a Child with Hypotonia: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-200-300-mean-for-a-child-with-hypotonia-low-muscle-tone
- What an AbilityScore of 300–400 Means for Hypotonia: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-300-400-mean-for-a-child-with-hypotonia-low-muscle-tone
- What an AbilityScore of 400–500 Means for a Child with Hypotonia: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-400-500-mean-for-a-child-with-hypotonia-low-muscle-tone
- AbilityScore 500–600 with Hypotonia: What It Means: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-500-600-mean-for-a-child-with-hypotonia-low-muscle-tone
- What an AbilityScore of 600–700 Means for Hypotonia: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-600-700-mean-for-a-child-with-hypotonia-low-muscle-tone
- What an AbilityScore of 700–800 Means for a Child with Hypotonia: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-700-800-mean-for-a-child-with-hypotonia-low-muscle-tone

### Explore therapy & support
- Which ICHI health interventions apply to hypotonia in young children?: https://pinnacleblooms.org/ask/which-ichi-health-interventions-apply-to-hypotonia-low-muscle-tone-in-young-children
- Supporting a Child with Low Muscle Tone Day to Day: https://pinnacleblooms.org/ask/as-a-grandparent-or-caregiver-how-can-i-support-a-child-with-hypotonia-low-muscle-tone-day-to-day
- Can a child with hypotonia attend a mainstream school?: https://pinnacleblooms.org/ask/can-a-child-with-hypotonia-low-muscle-tone-attend-a-mainstream-school
- Can a Child with Hypotonia Attend a Regular School?: https://pinnacleblooms.org/ask/can-a-child-with-hypotonia-low-muscle-tone-attend-a-regular-school
- Can a Child with Hypotonia Grow Up to Live Independently?: https://pinnacleblooms.org/ask/can-a-child-with-hypotonia-low-muscle-tone-grow-up-to-live-independently
- How can a classroom teacher help a child with Hypotonia take part and learn?: https://pinnacleblooms.org/ask/how-can-a-classroom-teacher-help-a-child-with-hypotonia-low-muscle-tone-take-part-and-learn
- Hypotonia in district early intervention: identify and support under-7s: https://pinnacleblooms.org/ask/how-can-a-district-early-intervention-programme-identify-and-support-children-under-7-with-hypotonia-low-muscle-tone
- How a teacher can include and support a child with hypotonia in a mainstream classroom: https://pinnacleblooms.org/ask/how-can-a-teacher-include-and-support-a-young-child-with-hypotonia-low-muscle-tone-in-a-mainstream-classroom
- How to Support Motor Development with Hypotonia (Low Muscle Tone): https://pinnacleblooms.org/ask/how-can-we-support-motor-development-in-a-child-with-hypotonia-low-muscle-tone
- How therapy helps a child with hypotonia make progress: https://pinnacleblooms.org/ask/how-does-therapy-help-a-child-with-hypotonia-low-muscle-tone-make-progress
- How Is Hypotonia (Low Muscle Tone) Diagnosed in a Child?: https://pinnacleblooms.org/ask/how-is-hypotonia-low-muscle-tone-diagnosed-in-a-child
- How Hypotonia (Low Muscle Tone) Is Supported Through Therapy: https://pinnacleblooms.org/ask/how-is-hypotonia-low-muscle-tone-supported-through-therapy

### At home & in everyday life
- How can I support my child with Hypotonia at home?: https://pinnacleblooms.org/ask/how-can-i-support-my-child-with-hypotonia-low-muscle-tone-at-home