Your Complete Guide to the New 2024-2025 ICD-10-CM Updates

Do you know CMS has finally announced ICD-10-CM updates for 2024-2025? These updates will introduce new codes, revisions, and deletions while impacting various specialties. CMS has provided all the latest codes required for the coming advancements in medicine and newly emerging diseases, treatments, and conditions. These ICD-10-CM updates will make sure that the USA’s medical coding system remains up-to-date with emerging medical practices. They will also enable providers to document new diagnoses and procedures accurately to get reimbursed correctly.

This blog will explore some of the important new ICD-10-CM updates and code revisions so you can easily integrate them into your practice and protect your revenue.

How Many Codes Are Included in ICD-10-CM Updates?

The 2025 ICD-10 code changes include the addition of 291 new codes, 3 deletions, 14 revised code descriptions, and 33 code conversions to parent codes. These updates are made to address emerging health conditions while improving documentation precision and maintaining compliance with coding standards. The breakdown of new codes is as follows and you can also find the official list of new ICD-10-CM updates here. 

Change	Description	Effective Date
New Codes	291 new codes added	October 1st, 2024
Deleted Codes	3 codes removed	October 1st, 2024
Revised Codes	14 code titles revised	October 1st, 2024
Conversions to Parent Codes	33 Codes Converted	October 1st, 2024

Major Specialty-Specific 2024-2025 ICD-10-CM Updates

Here are the specialties that underwent code changes, deletions, or revisions based on the October 2024 ICD-10-CM updates:

1. Oncology (Lymphomas & Hematologic Disorders)

This year ICD-10-CM 2025 updates include numerous new codes for various types of Hodgkin and non-Hodgkin lymphomas. These codes now account for conditions where the disease is in remission, improving the documentation of cancer recovery.

New Codes

There are now multiple new codes for Hodgkin, non-Hodgkin, & various types of B-cell and T-cell lymphomas.

Deleted Codes

Diffuse large B-cell lymphoma, extranodal sites; NK/T-cell lymphoma, nasal type.

The list of important codes added for the Oncology specialty:

Code	Description
C81.0A	Nodular lymphocyte predominant HL, in abatement
C81.2A	Mixed cellularity Hodgkin lymphoma with remission
C82.0A	Follicular lymphoma grade I, in diminution
C83.7A	Burkitt lymphoma, in alleviation

2. Endocrinology (Diabetes & Metabolic Disorders)

The new ICD10 code changes for 2024-2025 have codes for Type 1 diabetes. These codes will pave the way for early disease detection and management. These updates emphasize prevention to help providers document pre-diabetic conditions for value-based care.

New Codes

There are codes in the update for presymptomatic Type 1 diabetes mellitus, and disorders of citrate metabolism.

The list of important codes added for Endocrinology:

Code	Description
E10.A	Type 1 diabetes mellitus, pre-symptomatic
E10.A1	Type 1 diabetes, presymptomatic, Stage 1
E10.A2	Type 1 DM, presymptomatic, Stage 2

3. Gastroenterology (Fistulas)

In gastro coding, updates for anorectal and rectal fistulas provide more detailed descriptions of complex cases in order to improve accuracy in surgical documentation and post-procedure follow-ups.

New Codes

There are now many new codes for anal, rectal, and anorectal fistulas, differentiated by complexity and recurrence.

The list of most important codes added for Gastroenterology:

Code	Description
K60.30	Anal fistula, unspecified
K60.32	Anal fistula, complex
K60.42	Rectal fistula, complex

4. Neurology (Epilepsy & Neurological Conditions)

In the case of neurology, changes in the code come with the inclusion of new KCNQ 2-related epilepsy codes as a means of providing a detailed categorization of this rare but worthy condition. Accurate documentation will here allow for improved tracking of treatment outcomes and patient care.

New Codes

This update holds new codes for KCNQ2-related epilepsy and developmental encephalopathies.

The list of \ important codes added for Neurology:

Code	Description
G40.841	KCNQ2 epilepsy, not intractable, with status epilepticus
G40.844	KCNQ2 related epilepsy, intractable, without status epilepticus

5. Pulmonology (Embolisms)

New ICD-10-CM codes for embolism-related conditions have been introduced for pulmonology with specific attention to embolisms without acute cor pulmonale. These updates will help providers distinguish between complex pulmonary conditions for more accurate documentation and treatment.

New Codes

This CMS update adds codes for cement and fat embolism of the pulmonary artery with or without cor pulmonale.

The list of t important codes added for Pulmonology:

Code	Description
I26.95	Cement embolism of pulmonary artery without acute cor pulmonale
I26.96	Fat embolism without acute cor pulmonale

6. Mental Health (Eating Disorders)

The 2025 updates also introduced new codes for mental eating disorders, reflecting varying degrees of severity. These codes allow providers to track and document the severity of these conditions more accurately.

New Codes

There are many new codes added for anorexia nervosa and bulimia nervosa with various severity levels.

Deleted Codes

General codes for bulimia and binge eating disorders are now deleted.

The list of  important codes added for Mental Health specialty:

Code	Description
F50.010	Anorexia nervosa, restricting type, mild
F50.021	Binge eating/purging type, Anorexia nervosa, moderate
F50.23	Bulimia nervosa, severe
F50.813	Binge disorder, extreme

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7. Cardiology (Congenital Heart Defects)

CMS has added new codes for cardiology specialty to classify congenital heart defects more specifically, including conditions like bicuspid aortic valve and congenital mitral valve clefts. These updates enhance the accuracy of documenting congenital heart conditions.

New Codes

This update discloses a huge list of new codes for bicuspid aortic valve and congenital mitral valve malformations.

The list of important codes added for Cardiology:

Code	Description
Q23.81	Bicuspid aortic valve
Q23.82	Congenital mitral valve cleft leaflet
Q23.88	Other malformations of aortic & mitral valves

8. Obesity and Metabolic Disorders

For obesity, new codes have also been introduced to reflect different classifications, including obesity due to specific metabolic pathways, like the disruption of the MC4R pathway. This helps in more personalized treatment planning and documentation for providers.

New Codes

The list of new codes for obesity differentiates obesity by class and metabolic causes.

The list of important codes added for Obesity and Metabolism Disorders:

Code	Description
E66.811	Obesity, class 1
E66.812	Obesity, class 2
E66.813	Obesity, class 3
E88.82	Obesity caused by problems with the MC4R pathway

9. Dermatology (Alopecia & Pruritus)

The ICD-10-CM updates now cover different types of alopecia, including frontal fibrosing alopecia and lichen planopilaris. These updates offer more specific documentation options for alopecia and pruritus.

New Codes

The new update has many new codes for different types of lichen planopilaris and pruritus.

The list of most important codes added for Dermatology specialty:

Code	Description
L66.12	Frontal fibrosing alopecia
L66.19	Other lichen planopilaris
L29.81	Cholestatic pruritus
L29.89	Other pruritus

10. Musculoskeletal (Disc Degeneration & Synovitis)

The 2025 updates add codes for disc degeneration in specific spinal regions, offering more detailed descriptions of lumbar and lumbosacral region conditions. They also include updates for synovitis and tenosynovitis affecting different body parts.

New Codes

There are new codes for lumbar and lumbosacral disc degeneration and synovitis affecting multiple  joints.

The list of most important codes added for Musculoskeletal:

Code	Description
M51.360	Other intervertebral disc degeneration, lumbar region with discogenic back pain only
M51.370	Other intervertebral disc degeneration, lumbosacral region with discogenic back pain only
M65.911	Unspecified synovitis and tenosynovitis, right shoulder
M65.941	Unspecified clear synovitis and tenosynovitis, right hand

These specialties reflect the broad impact of the 2024 ICD-10-CM updates to ensure more precise documentation for emerging medical conditions and improved medical coding accuracy for complex cases.

Deleted Codes for ICD-10-CM Updates

There are 3 codes that are deleted from the previous  ICD-10 codes list to add new and refined codes for more comprehensive billing procedures. Here is the list of the deleted codes:

Code	Description
T81.32XA	Disruption of internal operation (surgical) wound, not elsewhere classified, initial encounter
T81.32XD	Disruption of internal operation (surgical) wound, not elsewhere classified, subsequent encounter
T81.32XS	Disruption of internal operation (surgical) wound, notelsewhere classified, sequela

Revised Medical Codes in 2024 ICD-10-CM Updates

CMS has revised 14 medical codes in total for the 2024 ICD-10-CM updates. The list of these codes is as follows:

• A77.41

Ehrlichiosis chaffeensis [E. chaffeensis]

• F98.21

Rumination disorder of infancy and childhood

• G93.42

Megalencephalic leukoencephalopathy with subcortical cysts

• H44.2A3

Degenerative myopia with choroidal neovascularization,

bilateral

• H44.2B3

Degenerative myopia with macular hole, bilateral

• H44.2C3

Degenerative myopia with retinal detachment, bilateral

• H44.2D3

Degenerative myopia with foveoschisis, bilateral

• H44.2E3

Degenerative myopia with other maculopathy, bilateral

• I26.93

Single subsegmental thrombotic pulmonary embolism without

acute cor pulmonale

• I26.94

Multiple subsegmental thrombotic pulmonary emboli without

acute cor pulmonale

• K58.9

Irritable bowel syndrome with unspecification

• Q13.81

Rieger anomaly

• Z17

Estrogen, and other hormones and factors receptor status

• Z68.54

Body mass index [BMI] pediatric, 95th percentile for age to less than 120% of the 95th percentile for age

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List of Conversions to Parent Code in ICD 10 2025 Updates

The ICD 10 2025 updates made 33 code conversions to parent code in order to make the coding process more comprehensive and detailed. The list of the most important parent conversions based on the significance of conditions or their widespread impact is as follows:

• C86.0

Extranodal NK/T-cell lymphoma, nasal type 

• C88.0

Waldenstrom macroglobulinemia 

• C88.4

Extranodal marginal zone B-cell lymphoma of mucosa-associated lymphoid tissue (MALT-lymphoma) 

• E66. 8

Other obesity 

• F50.2

Bulimia nervosa 

• G90.8

Other disorders of autonomic nervous system 

• K60.3

 Anal fistula 

• M51.36

 Other intervertebral disc degeneration, lumbar region 

• Z86.010

Personal history of colon polyps 

These additions, revisions, deletions, and conversions highlight key changes that ensure more accurate diagnoses, treatment plans, and billing for complex conditions.

Benefits of the 2024-2025 ICD 10 Code Changes

i. Improved Accuracy

New codes allow for more precise documentation, particularly in cases like cancer remission and presymptomatic diabetes, improving patient care.

ii. Fewer Billing Errors

With clearer code definitions and updated medical billing codes, the likelihood of claim denials decreases, ensuring smoother financial operations.

iii. Enhanced Compliance

Accurate use of these codes ensures that providers meet regulatory requirements, especially when dealing with complex conditions.

Conclusion

In conclusion, these October 2024 ICD-10-CM updates represent the addition of new codes, modifications, and deletion of codes that are related to many different medical specialties. These changes will not only help in improving the accuracy of documentation and enhancement of the efficiency of the billing process but also advance better patient care. By integrating these updates into your practice, you ensure compliance, reduce claim errors, and streamline your medical coding processes.

For more details on the 2025 ICD-10 code changes, consider reviewing the official CMS documentation here or consult medical coding experts at Sirus Solutions to ensure a smooth billing process for your practice.