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    OpenPayerBilling CodesOther disorders originating in the perinatal periodICD-10-CM p94-disorders-of-muscle-tone
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    ICD-10-CM Code For Disorders Of Muscle Tone Of Newborn: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group P94 includes neonatal disorders of muscle tone such as hypotonia and hypertonia originating in the perinatal period and related manifestations due to neurologic or metabolic causes. These ICD-10-CM diagnosis codes are used to document specific neonatal neuromuscular presentations, capturing disease severity, neurologic involvement, and clinical complexity relevant to this group. Accurate coding within the ICD-10-CM P94 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM P94: Disorders Of Muscle Tone Of Newborn Overview

    The ICD-10-CM P94 group represents disorders of muscle tone presenting in the neonatal period, including abnormalities such as hypotonia and hypertonia related to perinatal events. These diagnoses target the neuromuscular and central nervous systems in newborns and often indicate underlying neurologic injury or metabolic conditions. Accurate coding matters for reimbursement because it ensures the clinical complexity and resource use for neonatal care are documented and supported.

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    When to Use

    Use a code from this group when a newborn is diagnosed with abnormal muscle tone during the perinatal period, such as noted hypotonia or hypertonia on examination. Codes in this group apply when the muscle tone abnormality is attributed to events or conditions originating in the perinatal period and is documented by the clinician.

    ICD-10-CM Codes

    5 rows

    ICD-10-CM CodeDescription
    P94.0Transient neonatal myasthenia gravis
    P94.1Congenital hypertonia
    P94.2Congenital hypotonia
    P94.8Other disorders of muscle tone of newborn
    P94.9Disorder of muscle tone of newborn, unspecified

    DRG Codes

    3 rows

    DRG CodeDescription
    791Prematurity with Major Problems
    793Full Term Neonate with Major Problems
    794Neonate with Other Significant Problems

    Typical Clinical Scenarios

    • A term newborn is noted in the nursery to have generalized hypotonia with poor spontaneous movements, weak cry, and difficulties feeding immediately after birth; the infant required neonatal intensive care evaluation to assess for neurologic or metabolic causes but no structural brain injury is identified on imaging, so the newborn is assigned a diagnosis for a disorder of muscle tone originating in the perinatal period. Typical codes: P94.1
    • A preterm infant who initially had normal tone subsequently develops persistent hypertonicity and increased limb stiffness over the first week of life following a complicated delivery with suspected hypoxic–ischemic insult; the alteration in muscle tone is documented as a perinatal-onset motor tone disorder and coded accordingly. Typical codes: P94.0, P94.2
    • An infant born after maternal chorioamnionitis presents later in the neonatal period with fluctuating tone and feeding intolerance as a comorbidity complicating the primary neonatal infection; when the muscle tone abnormality is attributed to perinatal conditions and documented separately from the infectious diagnosis, an appropriate perinatal muscle tone disorder code is assigned. Typical codes: P94.8, P94.9

    Related Codes

    P90-CONVULSIONS-OF-NEWBORN

    ICD-10-CM Code For Convulsions Of Newborn: Group Overview

    P91-OTHER-DISTURBANCES-OF-CEREBRAL-STATUS

    ICD-10-CM Code For Other Disturbances Of Cerebral Status Of Newborn: Group Overview

    P92-FEEDING-PROBLEMS-OF-NEWBORN

    ICD-10-CM Code For Feeding Problems Of Newborn: Group Overview

    P93-REACTIONS-AND-INTOXICATIONS-DUE-TO-DRUGS-ADMINISTERED-TO-NEWBORN

    ICD-10-CM Code For Reactions And Intoxications Due To Drugs Administered To Newborn: Group Overview

    P95-STILLBIRTH

    ICD-10-CM Code For Stillbirth: Group Overview

    P96-OTHER-CONDITIONS-ORIGINATING-IN-THE-PERINATAL-PERIOD

    ICD-10-CM Code For Other Conditions Originating In The Perinatal Period: Group Overview

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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