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

 

 

Download PDF

Michelle Sergei-Casiano
Michelle Sergei-Casiano
Michelle Sergei-Casiano

CPC, CFPC, CEMC
Senior Manager, Regulatory and Coding Compliance
coders@calmwatersai.com

 

More Coffee & Coding

HIPAA Compliance: Make sure you know ALL the rules

HIPAA Compliance: Make sure you know ALL the rules February 26, 2024 The Health Insurance Portability and Accountability Act (HIPAA) of 1996 is a federal law restricting access to individuals' private medical information. That much, I’m sure, our readers already knew....

Making sense of the new coding-by-time rules for 2024

Making sense of the new coding-by-time rules for 2024 February 19, 2024 We all know that the new year brings changes (some years, more than others). As it turns out, no sooner had we gotten clinicians on track with how much time belongs to the E/M CPT code set than...

How do you code a broken heart?

How do you code a broken heart? Plus: We answer your questions about toxicity monitoring. February 12, 2024 First things first: While remembering to apply the proper codes and include sufficient documentation, providers and coders must not lose sight of one essential...

Documentation Tips and Tricks: How to Avoid Common Mistakes

Documentation Tips and Tricks: How to Avoid Common Mistakes February 5, 2024 Every day we see coding mistakes that affect the accuracy of E/M coding levels. Some of them can be costly. So, in this issue of Coffee & Coding, we’ll look more closely at some of these...

Toxic diagnosis coding: What you may be missing

Toxic diagnosis coding: What you may be missing January 29, 2024 Three quick questions: When did you last look in that little section towards the back of your ICD-10 coding book called the Drug Table? How often have you coded an adverse reaction to a bug bite as...

Why and how to use the new SDOH codes

Why and how to use the new SDOH codes January 22, 2024 Social Determinants of Health (SDOH) have become increasingly important in determining the needs of patients and directing them to the help they need. For 2024, we have both a new diagnosis code as well as a new...

The long-awaited G2211 code: What you need to know

The long-awaited G2211 code: What you need to know January 15, 2024 There’s an important new code for 2024, and it pays (literally*) for you to know how and when to use it. Up to this point, E/M coding has failed to take into account the resources, time, and cost...

What’s changed in telehealth services?

What’s changed in telehealth services? January 8, 2024 The other day, another coder asked me whether post-operative services could be performed under telehealth. It occurred to me that there are probably more coders with the same questions. So, we’re devoting this...

Don’t Toss Those Old Code Books Just Yet

Don’t Toss Those Old Code Books Just Yet January 2, 2024 Welcome to 2024! After all the preparations, training, and education, are you ready to implement what we learned over the past four months about coding changes? Here are a couple of the most critical secrets to...

Common Coding and Documentation Problems You Can Avoid

Common Coding and Documentation Problems You Can Avoid December 26, 2023 In the spirit of the season, we’re offering you a holiday treat this week. Nearly 100 people signed up for our recent Zoom webinar: “Cracking the Code: Addressing Common Problem Areas in Medical...

Home for the Holidays Means More In-Home Injuries. Are You Code-Ready?

Home for the Holidays Means More In-Home Injuries. Are You Code-Ready? December 18, 2023 According to the Consumer Product Safety Commission, during the 2022 holiday season, nearly 15,000 Americans received medical treatment for decorating-related injuries—about 160...

More HCPCS coding changes you need to know now

More HCPCS coding changes you need to know now December 11, 2023 In last week’s Coffee & Coding, we addressed some of the roughly 350 additions to HCPCS codes that go into effect on January 1. This week, we’ll highlight the rest of the changes you’ll need to...

More coding changes are just one month away. Are you ready?

More coding changes are just one month away. Are you ready? December 4, 2023 In previous installments of Coffee & Coding, we’ve reviewed updates to ICD-10 and CPT codes for 2024, some of which have already gone into effect. Now, as we approach the end of the year,...

Are you coding for the whole picture?

Are you coding for the whole picture? November 27, 2023 We’ve had our first taste of winter in many parts of the country. And with winter come accidents caused by snow, icy surfaces, and outdoor activities—and injured patients whose encounters you’ll need to code...

Giving Thanks—and Not Burning Out

Giving Thanks—and Not Burning Out November 20, 2023 As you look forward to a long, relaxing weekend of family, food, and fun (and maybe some football, too), we’ll address an issue that increasingly affects both providers and coders—and serve up for Thanksgiving some...

Subscribe to Our Weekly Coffee & Coding Newsletter