2026 ICD-10-CM Diagnosis Code M62.89Other specified disorders of muscle

ICD-10-CM Codes›M00–M99›M60-M63›M62

ICD-10-CM M62.89
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M62.89 is a billable ICD-10-CM diagnosis code for other specified disorders of muscle. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 557 through 558. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Muscle disorders.

Code Identity

ICD-10-CM Code
M62.89
Billable Status
Yes — Valid for Submission
Code Describes
Other specified disorders of muscle
Short Description
Other specified disorders of muscle
Same as the full description in the CMS dataset.
Parent Code
M62.8
Other specified disorders of muscle

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM60-M63Disorders of muscles
CategoryM62Other disorders of muscle
This CodeM62.89Other specified disorders of muscle

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Abnormally decreased muscle contraction
  • Acquired hypotonia
  • Appendicular hypotonia
  • Asymmetric muscle tone
  • Autosomal dominant intellectual disability, craniofacial dysmorphism, macrocephaly, hypotonia syndrome due to H1-4 mutation
  • Bilateral hypertrophy of masseter muscles
  • Central muscle fatigue
  • Congenital radioulnar synostosis
  • Débré-Sémélaigne's syndrome
  • Degenerative disorder of muscle
  • Deposition in skeletal muscle
  • Enlargement of skeletal muscle
  • Episodic flaccidity of muscle
  • Episodic hypotonia
  • Exercise induced muscle fatigue
  • Finding of appearance of skeletal muscle
  • Finding of size of skeletal muscle
  • Flaccidity of muscle
  • Flaccidity of muscle of lower limb
  • Flaccidity of muscle of upper limb
  • Fluctuating muscle tone
  • Generalized hypertrophy of skeletal muscle
  • Generalized myokymia
  • Global developmental delay, visual anomalies, progressive cerebellar atrophy, truncal hypotonia syndrome
  • Hemihypertrophy of skeletal muscle
  • Hemorrhage of muscle
  • Hereditary cerebellar atrophy
  • Hereditary continuous muscle fiber activity
  • Hernia of muscle through fascia of lower leg
  • Herniation of lumbar muscles
  • High frequency muscle fatigue
  • Hypertrophic cardiomyopathy with hypotonia and lactic acidosis syndrome
  • Hypertrophic mitochondrial cardiomyopathy
  • Hypertrophy of erector spinae muscle
  • Hypertrophy of left masseter muscle
  • Hypertrophy of masseter muscle
  • Hypertrophy of muscle of calf
  • Hypertrophy of muscle of forearm
  • Hypertrophy of muscle of left lower limb
  • Hypertrophy of muscle of left upper limb
  • Hypertrophy of muscle of lower limb
  • Hypertrophy of muscle of neck
  • Hypertrophy of muscle of right lower limb
  • Hypertrophy of muscle of right upper limb
  • Hypertrophy of muscle of shoulder joint
  • Hypertrophy of muscle of thigh
  • Hypertrophy of muscle of upper arm
  • Hypertrophy of muscle of upper limb
  • Hypertrophy of muscles of mastication
  • Hypertrophy of right masseter muscle
  • Hypotonia of axial muscles occurring in infancy
  • Hypotonia of muscle of face
  • Hypotonia of muscles of mouth region
  • Inappropriate firing of muscle
  • Incomplete closure of velopharyngeal apparatus due to anatomical abnormality
  • Increased muscle tone
  • Increased muscle tone - left side more than right side
  • Increased muscle tone - right side more than left side
  • Intellectual disability, macrocephaly, hypotonia, behavioral abnormalities syndrome
  • Lethal pontocerebellar hypoplasia, hypotonia, respiratory insufficiency syndrome
  • Low frequency muscle fatigue
  • Microcephaly, intellectual disability, sensorineural hearing loss, epilepsy, abnormal muscle tone syndrome
  • Muscle asynchronous firing potential
  • Muscle fatigue
  • Muscle fibrillation
  • Muscle irritability
  • Muscle power unequal
  • Muscular steatosis
  • Myofibrosis
  • Myokymia, hyperhidrosis, impaired muscle relaxation syndrome
  • Myomalacia
  • Myotonia
  • Myotonia acquisita
  • Myotonia due to cold exposure
  • Neonatal hypotonia
  • Neonatal neuromuscular disorder
  • Neurodevelopmental delay, hypotonia, cerebellar ataxia, cardiac conduction defects syndrome
  • Nodule in muscle
  • Peripheral muscle fatigue
  • Protective splinting of masticatory muscles
  • Quadratus lumborum syndrome
  • Radioulnar synostosis with developmental delay and hypotonia syndrome
  • Reduction of bulk of skeletal muscle
  • Reinnervation
  • Respiratory insufficiency syndrome of newborn
  • Severe hypertrophy of skeletal muscle
  • Skeletal muscle hypertrophy
  • Skeletal muscle power problem
  • Skeletal muscle problem
  • Spontaneous EMG activity
  • Subgaleal hemorrhage
  • X-linked intellectual disability and hypotonia with facial dysmorphism and aggressive behavior syndrome
  • X-linked intellectual disability, hypotonia, movement disorder syndrome

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Muscle (sheath) hernia

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Amyotonia
    • Cicatrix(adherent) (contracted) (painful) (vicious)
      • muscle
    • Defect, defective
      • extensor retinaculum
    • Deformity
      • muscle (acquired)
    • Degeneration, degenerative
      • muscle (fatty) (fibrous) (hyaline) (progressive)
    • Disease, diseased
      • fascia NEC
        • specified NEC
    • Disorder(of)
      • muscle
        • specified type NEC
    • Fatigue
      • muscle
    • Fibrillation
      • muscular
    • Hemorrhage, hemorrhagic(concealed)
      • muscle
    • Hernia, hernial(acquired) (recurrent)
      • fascia
    • Hernia, hernial(acquired) (recurrent)
      • muscle (sheath)
    • Hypertrophy, hypertrophic
      • muscle
    • Infiltrate, infiltration
      • muscle, fatty
    • Myofibrosis
    • Myomalacia
    • Myotonia(acquisita) (intermittens)
    • Scar, scarring
      • muscle
    • Talma's disease
    • Tight, tightness
      • fascia (lata)

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR MUS026
Muscle disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Myotonia

    prolonged failure of muscle relaxation after contraction. this may occur after voluntary contractions, muscle percussion, or electrical stimulation of the muscle. myotonia is a characteristic feature of myotonic disorders.

  • Myotonia Congenita

    inherited myotonic disorders with early childhood onset myotonia. muscular hypertrophy is common and myotonia may impair ambulation and other movements. it is classified as thomsen (autosomal dominant) or becker (autosomal recessive) generalized myotonia mainly based on the inheritance pattern. becker type is also clinically more severe. an autosomal dominant variant with milder symptoms and later onset is known as myotonia levior. mutations in the voltage-dependent skeletal muscle chloride channel are associated with the disorders.

  • Myotonic Disorders

    diseases characterized by myotonia, which may be inherited or acquired. myotonia may be restricted to certain muscles (e.g., intrinsic hand muscles) or occur as a generalized condition.

  • Myotonic Dystrophy

    neuromuscular disorder characterized by progressive muscular atrophy; myotonia, and various multisystem atrophies. mild intellectual disability may also occur. abnormal trinucleotide repeat expansion in the 3' untranslated regions of dmpk protein gene is associated with myotonic dystrophy 1. dna repeat expansion of zinc finger protein-9 gene intron is associated with myotonic dystrophy 2.

  • Osteochondrodysplasias

    abnormal development of cartilage and bone.

  • Muscle Fatigue

    a state arrived at through prolonged and strong contraction of a muscle. studies in athletes during prolonged submaximal exercise have shown that muscle fatigue increases in almost direct proportion to the rate of muscle glycogen depletion. muscle fatigue in short-term maximal exercise is associated with oxygen lack and an increased level of blood and muscle lactic acid, and an accompanying increase in hydrogen-ion concentration in the exercised muscle.

  • Subgaleal Hemorrhage

    bleeding between the scalp and the periosteum.

  • Subgaleal Hemorrhage Related to Birth|Epicranial Subaponeurotic Hemorrhage Related to Birth|Epicranial Subaponeurotic Hemorrhage Related to Birth

    bleeding in the potential space between the skull periosteum and the scalp galea aponeurosis of a newborn infant due to shearing forces on the tentorium and deep venous system during labor and delivery.

Patient EducationClinical

Muscle Disorders

Your muscles help you move and help your body work. Different types of muscles have different jobs. There are many problems that can affect muscles. Muscle disorders can cause weakness, pain or even paralysis.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert M62.89 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
728.3 Muscle disorders NEC
Approximate The match is approximate rather than exact.
ICD-9-CM
728.89 Muscle/ligament dis NEC
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About M62.89Overview

Is M62.89 (Other specified disorders of muscle) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other specified disorders of muscle on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does M62.89 group to?

When other specified disorders of muscle is the principal diagnosis on an inpatient stay, it groups to MS-DRG 557, 558, with relative weights from 0.8932 to 1.4869 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of M62.89?

Under the General Equivalence Mappings, other specified disorders of muscle converts to ICD-9-CM 728.3 (muscle disorders NEC) and 728.89 (muscle/ligament dis NEC). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.