2026 Unspecified ICD-10-CM Codes - Page 4

The 2026 Unspecified ICD-10-CM Codes list includes 30,368 valid codes for situations where medical documentation does not provide enough detail to assign a more specific code. While coders are encouraged to use the most detailed diagnosis possible, unspecified codes are sometimes necessary to accurately reflect the patient’s condition when clinical information is incomplete. Proper use of these codes helps reduce claim denials, supports accurate billing, and ensures compliance with Medicare and payer guidelines. Documentation must clearly support the need for using an unspecified code.

  1. Alcohol related disorders (F10)
  2. Alzheimer's disease (G30)
  3. Attention-deficit hyperactivity disorders (F90)
  4. Bacterial meningitis, not elsewhere classified (G00)
  5. Bipolar disorder (F31)
  6. Cannabis related disorders (F12)
  7. Cerebral palsy (G80)
  8. Cocaine related disorders (F14)
  9. Conduct disorders (F91)
  10. Depressive episode (F32)
  11. Disorders of autonomic nervous system (G90)
  12. Disorders of other cranial nerves (G52)
  13. Disorders of social functioning with onset specific to child
  14. Disorders of trigeminal nerve (G50)
  15. Dissociative and conversion disorders (F44)
  16. Dystonia (G24)
  17. Eating disorders (F50)
  18. Emotional disorders with onset specific to childhood (F93)
  19. Encephalitis, myelitis and encephalomyelitis (G04)
  20. Epilepsy and recurrent seizures (G40)
  21. Facial nerve disorders (G51)
  22. Gender identity disorders (F64)
  23. Hallucinogen related disorders (F16)
  24. Hemiplegia and hemiparesis (G81)
  25. Hereditary and idiopathic neuropathy (G60)
  26. Hereditary ataxia (G11)
  27. Hordeolum and chalazion (H00)
  28. Hydrocephalus (G91)
  29. Impulse disorders (F63)
  30. Inflammatory polyneuropathy (G61)
  31. Inhalant related disorders (F18)
  32. Intracranial and intraspinal abscess and granuloma (G06)
  33. Major depressive disorder, recurrent (F33)
  34. Manic episode (F30)
  35. Meningitis due to other and unspecified causes (G03)
  36. Migraine (G43)
  37. Mononeuropathies of lower limb (G57)
  38. Mononeuropathies of upper limb (G56)
  39. Multiple sclerosis (G35)
  40. Myasthenia gravis and other myoneural disorders (G70)
  41. Nerve root and plexus disorders (G54)
  42. Nicotine dependence (F17)
  43. Obsessive-compulsive disorder (F42)
  44. Opioid related disorders (F11)
  45. Other acute disseminated demyelination (G36)
  46. Other and unspecified diseases of spinal cord (G95)
  47. Other and unspecified myopathies (G72)
  48. Other and unspecified polyneuropathies (G62)
  49. Other anxiety disorders (F41)
  50. Other behavioral and emotional disorders with onset usually
  51. Other degenerative diseases of basal ganglia (G23)
  52. Other degenerative diseases of nervous system, not elsewhere
  53. Other demyelinating diseases of central nervous system (G37)
  54. Other disorders of adult personality and behavior (F68)
  55. Other disorders of brain (G93)
  56. Other disorders of central nervous system (G96)
  57. Other extrapyramidal and movement disorders (G25)
  58. Other headache syndromes (G44)
  59. Other mental disorders due to known physiological condition
  60. Other mononeuropathies (G58)
  61. Other nonpsychotic mental disorders (F48)
  62. Other paralytic syndromes (G83)
  63. Other psychoactive substance related disorders (F19)
  64. Other stimulant related disorders (F15)
  65. Paraphilias (F65)
  66. Paraplegia (paraparesis) and quadriplegia (quadriparesis) (G
  67. Parkinson's disease (G20)
  68. Persistent mood [affective] disorders (F34)
  69. Personality and behavioral disorders due to known physiologi
  70. Pervasive developmental disorders (F84)
  71. Phobic anxiety disorders (F40)
  72. Primary disorders of muscles (G71)
  73. Reaction to severe stress, and adjustment disorders (F43)
  74. Schizoaffective disorders (F25)
  75. Schizophrenia (F20)
  76. Secondary parkinsonism (G21)
  77. Sedative, hypnotic, or anxiolytic related disorders (F13)
  78. Sexual dysfunction not due to a substance or known physiolog
  79. Sleep disorders (G47)
  80. Sleep disorders not due to a substance or known physiologica
  81. Somatoform disorders (F45)
  82. Specific developmental disorders of scholastic skills (F81)
  83. Specific developmental disorders of speech and language (F80
  84. Specific personality disorders (F60)
  85. Spinal muscular atrophy and related syndromes (G12)
  86. Tic disorder (F95)
  87. Toxic encephalopathy (G92)
  88. Transient cerebral ischemic attacks and related syndromes (G
  89. Unspecified behavioral syndromes associated with physiologic
  90. Unspecified dementia (F03)
  91. Unspecified disorder of adult personality and behavior (F69)
  92. Unspecified disorder of psychological development (F89)
  93. Unspecified intellectual disabilities (F79)
  94. Unspecified mental disorder due to known physiological condi
  95. Unspecified mood [affective] disorder (F39)
  96. Unspecified psychosis not due to a substance or known physio
  • G30.9 - Alzheimer's disease, unspecified Billable

  • F90.9 - Attention-deficit hyperactivity disorder, unspecified type Billable

  • G00.9 - Bacterial meningitis, unspecified Billable

  • F31.10 - Bipolar disorder, current episode manic without psychotic features, unspecified Billable

  • F31.30 - Bipolar disorder, current episode depressed, mild or moderate severity, unspecified Billable

  • F31.60 - Bipolar disorder, current episode mixed, unspecified Billable

  • F31.70 - Bipolar disorder, currently in remission, most recent episode unspecified Billable

  • F31.9 - Bipolar disorder, unspecified Billable

  • G80.9 - Cerebral palsy, unspecified Billable

  • F91.9 - Conduct disorder, unspecified Billable

  • F32.9 - Major depressive disorder, single episode, unspecified Billable

  • F32.A - Depression, unspecified Billable

  • G90.50 - Complex regional pain syndrome I, unspecified Billable

  • G90.519 - Complex regional pain syndrome I of unspecified upper limb Billable

  • G90.529 - Complex regional pain syndrome I of unspecified lower limb Billable

  • G90.9 - Disorder of the autonomic nervous system, unspecified Billable

  • G52.9 - Cranial nerve disorder, unspecified Billable

  • F94.9 - Childhood disorder of social functioning, unspecified Billable

  • G50.9 - Disorder of trigeminal nerve, unspecified Billable

  • F44.9 - Dissociative and conversion disorder, unspecified Billable

  • G24.9 - Dystonia, unspecified Billable

  • F50.00 - Anorexia nervosa, unspecified Billable

  • F50.019 - Anorexia nervosa, restricting type, unspecified Billable

  • F50.029 - Anorexia nervosa, binge eating/purging type, unspecified Billable

  • F50.20 - Bulimia nervosa, unspecified Billable

  • F50.819 - Binge eating disorder, unspecified Billable

  • F50.9 - Eating disorder, unspecified Billable

  • F93.9 - Childhood emotional disorder, unspecified Billable

  • G04.00 - Acute disseminated encephalitis and encephalomyelitis, unspecified Billable

  • G04.30 - Acute necrotizing hemorrhagic encephalopathy, unspecified Billable

  • G04.9 - Encephalitis, myelitis and encephalomyelitis, unspecified Non-Billable

  • G04.90 - Encephalitis and encephalomyelitis, unspecified Billable

  • G04.91 - Myelitis, unspecified Billable

  • G40.9 - Epilepsy, unspecified Non-Billable

  • G40.90 - Epilepsy, unspecified, not intractable Non-Billable

  • G40.901 - Epilepsy, unspecified, not intractable, with status epilepticus Billable

  • G40.909 - Epilepsy, unspecified, not intractable, without status epilepticus Billable

  • G40.91 - Epilepsy, unspecified, intractable Non-Billable

  • G40.911 - Epilepsy, unspecified, intractable, with status epilepticus Billable

  • G40.919 - Epilepsy, unspecified, intractable, without status epilepticus Billable

  • G51.39 - Clonic hemifacial spasm, unspecified Billable

  • G51.9 - Disorder of facial nerve, unspecified Billable

  • F64.9 - Gender identity disorder, unspecified Billable

  • G81.00 - Flaccid hemiplegia affecting unspecified side Billable

  • G81.10 - Spastic hemiplegia affecting unspecified side Billable

  • G81.9 - Hemiplegia, unspecified Non-Billable

  • G81.90 - Hemiplegia, unspecified affecting unspecified side Billable

  • G81.91 - Hemiplegia, unspecified affecting right dominant side Billable

  • G81.92 - Hemiplegia, unspecified affecting left dominant side Billable

  • G81.93 - Hemiplegia, unspecified affecting right nondominant side Billable

  • G81.94 - Hemiplegia, unspecified affecting left nondominant side Billable

  • G60.9 - Hereditary and idiopathic neuropathy, unspecified Billable

  • G11.10 - Early-onset cerebellar ataxia, unspecified Billable

  • G11.9 - Hereditary ataxia, unspecified Billable

  • H00.013 - Hordeolum externum right eye, unspecified eyelid Billable

  • H00.016 - Hordeolum externum left eye, unspecified eyelid Billable

  • H00.019 - Hordeolum externum unspecified eye, unspecified eyelid Billable

  • H00.023 - Hordeolum internum right eye, unspecified eyelid Billable

  • H00.026 - Hordeolum internum left eye, unspecified eyelid Billable

  • H00.029 - Hordeolum internum unspecified eye, unspecified eyelid Billable

  • H00.033 - Abscess of eyelid right eye, unspecified eyelid Billable

  • H00.036 - Abscess of eyelid left eye, unspecified eyelid Billable

  • H00.039 - Abscess of eyelid unspecified eye, unspecified eyelid Billable

  • H00.13 - Chalazion right eye, unspecified eyelid Billable

  • G91.3 - Post-traumatic hydrocephalus, unspecified Billable

  • G91.9 - Hydrocephalus, unspecified Billable

  • F63.9 - Impulse disorder, unspecified Billable

  • G61.9 - Inflammatory polyneuropathy, unspecified Billable

  • G06.2 - Extradural and subdural abscess, unspecified Billable

  • F33.40 - Major depressive disorder, recurrent, in remission, unspecified Billable

  • F33.9 - Major depressive disorder, recurrent, unspecified Billable

  • F30.10 - Manic episode without psychotic symptoms, unspecified Billable

  • F30.9 - Manic episode, unspecified Billable

  • G03 - Meningitis due to other and unspecified causes Non-Billable

  • G03.9 - Meningitis, unspecified Billable

  • G43.9 - Migraine, unspecified Non-Billable

  • G43.90 - Migraine, unspecified, not intractable Non-Billable

  • G43.901 - Migraine, unspecified, not intractable, with status migrainosus Billable

  • G43.909 - Migraine, unspecified, not intractable, without status migrainosus Billable

  • G43.91 - Migraine, unspecified, intractable Non-Billable

  • G43.911 - Migraine, unspecified, intractable, with status migrainosus Billable

  • G43.919 - Migraine, unspecified, intractable, without status migrainosus Billable

  • G57.00 - Lesion of sciatic nerve, unspecified lower limb Billable

  • G57.10 - Meralgia paresthetica, unspecified lower limb Billable

  • G57.20 - Lesion of femoral nerve, unspecified lower limb Billable

  • G57.30 - Lesion of lateral popliteal nerve, unspecified lower limb Billable

  • G57.40 - Lesion of medial popliteal nerve, unspecified lower limb Billable

  • G57.50 - Tarsal tunnel syndrome, unspecified lower limb Billable

  • G57.60 - Lesion of plantar nerve, unspecified lower limb Billable

  • G57.70 - Causalgia of unspecified lower limb Billable

  • G57.80 - Other specified mononeuropathies of unspecified lower limb Billable

  • G57.9 - Unspecified mononeuropathy of lower limb Non-Billable

  • G57.90 - Unspecified mononeuropathy of unspecified lower limb Billable

  • G57.91 - Unspecified mononeuropathy of right lower limb Billable

  • G57.92 - Unspecified mononeuropathy of left lower limb Billable

  • G57.93 - Unspecified mononeuropathy of bilateral lower limbs Billable

  • G56.00 - Carpal tunnel syndrome, unspecified upper limb Billable

  • G56.10 - Other lesions of median nerve, unspecified upper limb Billable

  • G56.20 - Lesion of ulnar nerve, unspecified upper limb Billable

  • G56.30 - Lesion of radial nerve, unspecified upper limb Billable

  • G56.40 - Causalgia of unspecified upper limb Billable

  • G56.80 - Other specified mononeuropathies of unspecified upper limb Billable

  • G56.9 - Unspecified mononeuropathy of upper limb Non-Billable

  • G56.90 - Unspecified mononeuropathy of unspecified upper limb Billable

  • G56.91 - Unspecified mononeuropathy of right upper limb Billable

  • G56.92 - Unspecified mononeuropathy of left upper limb Billable

  • G56.93 - Unspecified mononeuropathy of bilateral upper limbs Billable

  • G35.B0 - Primary progressive multiple sclerosis, unspecified Billable

  • G35.C0 - Secondary progressive multiple sclerosis, unspecified Billable

  • G35.D - Multiple sclerosis, unspecified Billable

  • G70.80 - Lambert-Eaton syndrome, unspecified Billable

  • G70.9 - Myoneural disorder, unspecified Billable

  • G54.9 - Nerve root and plexus disorder, unspecified Billable

  • F17.20 - Nicotine dependence, unspecified Non-Billable

  • F17.200 - Nicotine dependence, unspecified, uncomplicated Billable

  • F17.201 - Nicotine dependence, unspecified, in remission Billable

  • F17.203 - Nicotine dependence unspecified, with withdrawal Billable

  • F17.208 - Nicotine dependence, unspecified, with other nicotine-induced disorders Billable

  • F17.209 - Nicotine dependence, unspecified, with unspecified nicotine-induced disorders Billable

  • F17.219 - Nicotine dependence, cigarettes, with unspecified nicotine-induced disorders Billable

  • F17.229 - Nicotine dependence, chewing tobacco, with unspecified nicotine-induced disorders Billable

  • F17.299 - Nicotine dependence, other tobacco product, with unspecified nicotine-induced disorders Billable

  • F42.9 - Obsessive-compulsive disorder, unspecified Billable

  • G36.9 - Acute disseminated demyelination, unspecified Billable

  • G95 - Other and unspecified diseases of spinal cord Non-Billable

  • G95.2 - Other and unspecified cord compression Non-Billable

  • G95.20 - Unspecified cord compression Billable

  • G95.9 - Disease of spinal cord, unspecified Billable

  • G72 - Other and unspecified myopathies Non-Billable

  • G72.9 - Myopathy, unspecified Billable

  • G62 - Other and unspecified polyneuropathies Non-Billable

  • G62.9 - Polyneuropathy, unspecified Billable

  • F41.9 - Anxiety disorder, unspecified Billable

  • F98.9 - Unspecified behavioral and emotional disorders with onset usually occurring in childhood and adolescence Billable

  • G23.9 - Degenerative disease of basal ganglia, unspecified Billable

  • G31.80 - Leukodystrophy, unspecified Billable

  • G31.9 - Degenerative disease of nervous system, unspecified Billable

  • G37.9 - Demyelinating disease of central nervous system, unspecified Billable

  • F68.10 - Factitious disorder imposed on self, unspecified Billable

  • G93.4 - Other and unspecified encephalopathy Non-Billable

  • G93.40 - Encephalopathy, unspecified Billable

  • G93.9 - Disorder of brain, unspecified Billable

  • G96.00 - Cerebrospinal fluid leak, unspecified Billable

  • G96.810 - Intracranial hypotension, unspecified Billable

  • G96.9 - Disorder of central nervous system, unspecified Billable

  • G25.7 - Other and unspecified drug induced movement disorders Non-Billable

  • G25.70 - Drug induced movement disorder, unspecified Billable

  • G25.9 - Extrapyramidal and movement disorder, unspecified Billable

  • G44.00 - Cluster headache syndrome, unspecified Non-Billable

  • G44.001 - Cluster headache syndrome, unspecified, intractable Billable

  • G44.009 - Cluster headache syndrome, unspecified, not intractable Billable

  • G44.20 - Tension-type headache, unspecified Non-Billable

  • G44.201 - Tension-type headache, unspecified, intractable Billable

  • G44.209 - Tension-type headache, unspecified, not intractable Billable

  • G44.30 - Post-traumatic headache, unspecified Non-Billable

  • G44.301 - Post-traumatic headache, unspecified, intractable Billable

  • G44.309 - Post-traumatic headache, unspecified, not intractable Billable

  • F06.30 - Mood disorder due to known physiological condition, unspecified Billable

  • G58.9 - Mononeuropathy, unspecified Billable

  • F48.9 - Nonpsychotic mental disorder, unspecified Billable

  • G83.10 - Monoplegia of lower limb affecting unspecified side Billable

  • G83.20 - Monoplegia of upper limb affecting unspecified side Billable

  • G83.3 - Monoplegia, unspecified Non-Billable

  • G83.30 - Monoplegia, unspecified affecting unspecified side Billable

  • G83.31 - Monoplegia, unspecified affecting right dominant side Billable

  • G83.32 - Monoplegia, unspecified affecting left dominant side Billable

  • G83.33 - Monoplegia, unspecified affecting right nondominant side Billable

  • G83.34 - Monoplegia, unspecified affecting left nondominant side Billable

  • G83.9 - Paralytic syndrome, unspecified Billable

  • F65.50 - Sadomasochism, unspecified Billable

  • F65.9 - Paraphilia, unspecified Billable

  • G82.20 - Paraplegia, unspecified Billable

  • G82.50 - Quadriplegia, unspecified Billable

  • G20.C - Parkinsonism, unspecified Billable

  • F34.8 - Other persistent mood [affective] disorders Non-Billable

  • F34.81 - Disruptive mood dysregulation disorder Billable

  • F34.89 - Other specified persistent mood disorders Billable

  • F34.9 - Persistent mood [affective] disorder, unspecified Billable

  • F07.9 - Unspecified personality and behavioral disorder due to known physiological condition Billable

  • F84.9 - Pervasive developmental disorder, unspecified Billable

  • F40.00 - Agoraphobia, unspecified Billable

  • F40.10 - Social phobia, unspecified Billable

  • F40.9 - Phobic anxiety disorder, unspecified Billable

  • G71.00 - Muscular dystrophy, unspecified Billable

  • G71.0340 - Limb girdle muscular dystrophy due to sarcoglycan dysfunction, unspecified Billable

  • G71.039 - Limb girdle muscular dystrophy, unspecified Billable

  • G71.20 - Congenital myopathy, unspecified Billable

  • G71.9 - Primary disorder of muscle, unspecified Billable

  • F43.10 - Post-traumatic stress disorder, unspecified Billable

  • F43.20 - Adjustment disorder, unspecified Billable

  • F43.9 - Reaction to severe stress, unspecified Billable

  • F25.9 - Schizoaffective disorder, unspecified Billable

  • F20.9 - Schizophrenia, unspecified Billable

  • G21.9 - Secondary parkinsonism, unspecified Billable

  • F52.9 - Unspecified sexual dysfunction not due to a substance or known physiological condition Billable

  • G47.00 - Insomnia, unspecified Billable

  • G47.10 - Hypersomnia, unspecified Billable

  • G47.20 - Circadian rhythm sleep disorder, unspecified type Billable

  • G47.30 - Sleep apnea, unspecified Billable

  • G47.50 - Parasomnia, unspecified Billable

  • G47.9 - Sleep disorder, unspecified Billable

  • F51.9 - Sleep disorder not due to a substance or known physiological condition, unspecified Billable

  • F45.20 - Hypochondriacal disorder, unspecified Billable

  • F45.9 - Somatoform disorder, unspecified Billable

  • F81.9 - Developmental disorder of scholastic skills, unspecified Billable

  • F80.9 - Developmental disorder of speech and language, unspecified Billable

  • F60.9 - Personality disorder, unspecified Billable

  • F95.9 - Tic disorder, unspecified Billable

  • G92.00 - Immune effector cell-associated neurotoxicity syndrome, grade unspecified Billable

  • G92.9 - Unspecified toxic encephalopathy Billable

  • F59 - Unspecified behavioral syndromes associated with physiological disturbances and physical factors Billable

  • F03 - Unspecified dementia Non-Billable

  • F03.9 - Unspecified dementia, unspecified severity Non-Billable

  • F03.90 - Unspecified dementia, unspecified severity, without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety Billable

  • F03.91 - Unspecified dementia, unspecified severity, with behavioral disturbance Non-Billable

  • F03.911 - Unspecified dementia, unspecified severity, with agitation Billable

  • F03.918 - Unspecified dementia, unspecified severity, with other behavioral disturbance Billable

  • F03.92 - Unspecified dementia, unspecified severity, with psychotic disturbance Billable

  • F03.93 - Unspecified dementia, unspecified severity, with mood disturbance Billable

  • F03.94 - Unspecified dementia, unspecified severity, with anxiety Billable

  • F03.A - Unspecified dementia, mild Non-Billable

  • F03.A0 - Unspecified dementia, mild, without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety Billable

  • F03.A1 - Unspecified dementia, mild, with behavioral disturbance Non-Billable

  • F03.A11 - Unspecified dementia, mild, with agitation Billable

  • F03.A18 - Unspecified dementia, mild, with other behavioral disturbance Billable

  • F03.A2 - Unspecified dementia, mild, with psychotic disturbance Billable

  • F03.A3 - Unspecified dementia, mild, with mood disturbance Billable

  • F03.A4 - Unspecified dementia, mild, with anxiety Billable

  • F03.B - Unspecified dementia, moderate Non-Billable

  • F03.B0 - Unspecified dementia, moderate, without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety Billable

  • F03.B1 - Unspecified dementia, moderate, with behavioral disturbance Non-Billable

  • F03.B11 - Unspecified dementia, moderate, with agitation Billable

  • F03.B18 - Unspecified dementia, moderate, with other behavioral disturbance Billable

  • F03.B2 - Unspecified dementia, moderate, with psychotic disturbance Billable

  • F03.B3 - Unspecified dementia, moderate, with mood disturbance Billable

  • F03.B4 - Unspecified dementia, moderate, with anxiety Billable

  • F03.C - Unspecified dementia, severe Non-Billable

  • F03.C0 - Unspecified dementia, severe, without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety Billable

  • F03.C1 - Unspecified dementia, severe, with behavioral disturbance Non-Billable

  • F03.C11 - Unspecified dementia, severe, with agitation Billable

  • F03.C18 - Unspecified dementia, severe, with other behavioral disturbance Billable

  • F03.C2 - Unspecified dementia, severe, with psychotic disturbance Billable

  • F03.C3 - Unspecified dementia, severe, with mood disturbance Billable

  • F03.C4 - Unspecified dementia, severe, with anxiety Billable

  • F69 - Unspecified disorder of adult personality and behavior Billable

  • F89 - Unspecified disorder of psychological development Billable

  • F79 - Unspecified intellectual disabilities Billable

  • F09 - Unspecified mental disorder due to known physiological condition Billable

  • F39 - Unspecified mood [affective] disorder Billable

  • F29 - Unspecified psychosis not due to a substance or known physiological condition Billable