Coming October 1: 2024 ICD-10 Diagnosis Changes

September 18, 2023

This time of year can be stressful for providers and coders. It is a time when we’re on the lookout for notifications about ICD-10 code updates. Each year, the volume of these changes appears to increase. Although we are still awaiting details on the impending adjustments to CPT (Current Procedural Terminology) codes for 2024, we have already received notifications regarding the ICD-10 changes from CMS. The substantial modifications comprise 395 new codes, 25 deletions, 13 revisions, and updates to the addendum, tabular, code tables, and index.

So what is changing? Here is a brief overview:

• 24 new codes added to the diseases of the nervous system (G00-G99) chapter
• 34 new codes added to the diseases of the eye and adnexa (H00-H59) chapter
• 36 new codes added to the diseases of the musculoskeletal system and connective tissue (M00-M99) chapter
• 22 new codes added and six revised in the congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99) chapter
• 30 new codes added to and six invalidated from the factors influencing health status and contact with health services (Z00-Z99) chapter

We’ll go into more detail in subsequent editions of Coffee & Coding. For now, let’s start with the G and H chapters.

Here are the new codes for diseases of the nervous system (G00-G99):

G11.5	Hypomyelination – hypogonadotropic hypogonadism – hypodontia 4H syndrome add Pol III-related leukodystrophy
G11.6	Leukodystrophy with vanishing white matter disease
G20	Parkinson’s disease
G20A	Parkinson’s disease without dyskinesia
G20.A1	Parkinson’s disease w/o dyskinesia, w/o mention of fluctuations Parkinson’s disease without dyskinesia, without mention of OFF episodes Parkinson’s disease NOS
G20.A2	Parkinson’s disease without dyskinesia, with fluctuations Parkinson’s disease without dyskinesia, with OFF episodes
G20.B	Parkinson’s disease with dyskinesia Excludes1: drug-induced dystonia (G24.0-)
G20.B1	Parkinson’s disease with dyskinesia, w/o mention of fluctuations Parkinson’s disease with dyskinesia, without mention of OFF episodes
G20.B2	Parkinson’s disease with dyskinesia, with fluctuations Parkinson’s disease with dyskinesia, with OFF episodes
G20.C	Parkinsonism, unspecified Parkinsonism, NOS Excludes1: Parkinson’s disease NOS (G20.A1) Parkinson’s disease with dyskinesia (G20.B-) Parkinson’s disease without dyskinesia (G20.A-) secondary parkinsonism (G21-)
G23.3	Hypomyelination with atrophy of basal ganglia and cerebellum H-ABC
G31.80	Leukodystrophy, unspecified
G31.84	Mild cognitive impairment of uncertain or unknown etiology Use additional hypertension (I10-I16) revise to hypertension (I10-I1A)
G31.86	Alexander disease
G37.8	Other demyelinating diseases of the central nervous system
G37.81	Myelin oligodendrocyte glycoprotein antibody disease MOG antibody disease Code also associated manifestations, if known, such as: Add noninfectious acute disseminated encephalomyelitis (G04.81) Add neuromyelitis optica (G36.0)
G37.89	Other specified demyelinating diseases of the central nervous system
G40.C	Lafora progressive myoclonus epilepsy Lafora body disease Code also associated manifestations, if known, such as: noninfectious acute disseminated encephalomyelitis (G04.81) neuromyelitis optica (G36.0}
G40.C0	Lafora progressive myoclonus epilepsy, not intractable
G40C01	Lafora progressive myoclonus epilepsy, not intractable, with status epilepticus
G40C09	Lafora progressive myoclonus epilepsy, not intractable, without status epilepticus Lafora progressive myoclonus epilepsy NOS
G43.1	Migraine with aura Excludes1: chronic migraine with aura (G43.E-)
G43.E	Chronic migraine with aura Excludes1: migraine with aura (G43.1-)
G40.C1	Lafora progressive myoclonus epilepsy, intractable Chronic migraine with aura, without refractory migraine
G40.C11	Lafora progressive myoclonus epilepsy, intractable, with status epilepticus
G40.C19	Lafora progressive myoclonus epilepsy, intractable, without status epilepticus
G43.E0	Chronic migraine with aura, not intractable Chronic migraine with aura NOS
G43.E01	Chronic migraine with aura, not intractable, with status migrainosus
G43.E09	Chronic migraine with aura, not intractable, without status migrainosus
G43.E1	Chronic migraine with aura, intractable Chronic migraine with aura, with refractory migraine
G43.E11	Chronic migraine with aura, intractable, with status migrainosus
G43.E19	Chronic migraine with aura, intractable, without status migrainosus
G90.B	LMNB1-related autosomal dominant leukodystrophy
G93.42	Megaloencephalic leukoencephalopathy with subcortical cysts
G93.43	Leukoencephalopathy with calcifications and cysts
G93.44	Adult-onset leukodystrophy with axonal spheroids Adult-onset leukoencephalopathy with axonal spheroids and pigmented glia

 

Here are the new codes for retinal diseases:

H36	Retinal disorders in diseases classified elsewhere
H36.8	Other retinal disorders in diseases classified elsewhere
H36.81	Nonproliferative sickle-cell retinopathy
H36.811	Nonproliferative sickle-cell retinopathy, right eye
H36.812	Nonproliferative sickle-cell retinopathy, left eye
H36.813	Nonproliferative sickle-cell retinopathy, bilateral
H36.819	Nonproliferative sickle-cell retinopathy, unspecified eye
H36.82	Proliferative sickle-cell retinopathy
H36.821	Proliferative sickle-cell retinopathy, right eye
H36.822	Proliferative sickle-cell retinopathy, left eye
H36.823	Proliferative sickle-cell retinopathy, bilateral
H36.829	Proliferative sickle-cell retinopathy, unspecified eye
H36.89	Other retinal disorders in diseases classified elsewhere Retinal dystrophy in lipid storage disorders
H50.62	Inferior oblique muscle entrapment
H50.621	Inferior oblique muscle entrapment, right eye
H50.622	Inferior oblique muscle entrapment, left eye
H50.629	Inferior oblique muscle entrapment, unspecified eye
H50.63	Inferior rectus muscle entrapment
H50.631	Inferior rectus muscle entrapment, right eye
H50.632	Inferior rectus muscle entrapment, left eye
H50.639	Inferior rectus muscle entrapment, unspecified eye
H50.641	Lateral rectus muscle entrapment, right eye
H50.642	Lateral rectus muscle entrapment, left eye
H50.649	Lateral rectus muscle entrapment, unspecified eye
H50.65	Medial rectus muscle entrapment
H50.659	Medial rectus muscle entrapment, unspecified eye
H50.66	Superior oblique muscle entrapment
H50.661	Superior oblique muscle entrapment, right eye
H50.662	Superior oblique muscle entrapment, left eye
H50.669	Superior oblique muscle entrapment, unspecified eye
H50.67	Superior rectus muscle entrapment
H50.671	Superior rectus muscle entrapment, right eye
H50.672	Superior rectus muscle entrapment, left eye
H50.679	Superior rectus muscle entrapment, unspecified eye
H50.68	Extraocular muscle entrapment, unspecified
H50.681	Extraocular muscle entrapment, unspecified, right eye
H50.682	Extraocular muscle entrapment, unspecified, left eye
H06.89	Extraocular muscle entrapment, unspecified, unspecified eye
H50.681	Extraocular muscle entrapment, unspecified, right eye
H50.682	Extraocular muscle entrapment, unspecified, left eye
H50.689	Extraocular muscle entrapment, unspecified, unspecified eye
H54.5	Low vision, one eye
H54.51	Low vision, right eye, normal vision left eye Revise from
H54.511	Low vision, right eye, category 1-2 Revise to H54.511 Low vision, right eye, category 1 Delete H54.512A Low vision right eye category 2, normal vision left eye add
H54.512	Low vision, right eye, category 2 Add H54.512A Low vision right eye category 2 normal vision left eye
H57.8	Other specified disorders of eye and adnexa
H57.8A	Foreign body sensation eye (ocular)
H57.8A1	Foreign body sensation, right eye
H57.8A2	Foreign body sensation, left eye
H57.8A3	Foreign body sensation, bilateral eyes Add H57.8A9 Foreign body sensation, unspecified eye

 

 

Got a question about E/M coding? We’d love to hear from you.

Submit your questions by emailing us at coders@calmwatersai.com

 

 

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