News: Proposals for new ICD-10-CM codes aim to improve coding specificity

The Centers for Disease Control and Prevention (CDC) discussed 39 proposals involving diagnosis code topics at the public ICD-10- Coordination and Maintenance (CM) meeting this past September. These topics are being considered for implementation on April 1, 2027. The requests for this implementation date include:

Acute posterior vitreous detachment

Posterior vitreous detachment (PVD) occurs when the vitreous gel separates from the retina, typically as a natural part of aging. While most cases are benign, new-onset acute PVD carries a short-term risk of sight-threatening complications, including retinal tears and detachment. Distinguishing acute from chronic phases PVD is critical because complications are most likely to occur during the initial onset window, when prompt evaluation may be necessary. The proposal requests two new subcategories under H43.8- (other disorders of vitreous body) to distinguish acute and chronic PVD, improving patient surveillance and quality of care.

Carotid web

Carotid web, characterized by a shelf-like projection in the internal carotid artery, is increasingly recognized as a distinct cause of ischemic stroke. It is currently coded as either arterial fibromuscular dysplasia or another specified arterial disorder, despite clinical evidence suggesting it is a separate condition. To improve diagnostic accuracy and epidemiological tracking, the proposal requests a new subcategory under I77.8- (other specified disorders of arteries and arterioles) with codes specific to carotid web.

Chemotherapy-induced alopecia and persistent chemotherapy-induced alopecia

Hair loss affects up to 65% of patients undergoing chemotherapy. While chemotherapy-induced alopecia (CIA) is generally temporary, some patients, particularly those treated with taxanes and other cytotoxic agents, experience prolonged or permanent hair loss, known as persistent chemotherapy-induced alopecia (pCIA). Because current coding does not distinguish reversible from persistent hair loss, providers face challenges documenting the condition and supporting individualized care. The proposal suggests expanding code L65.8 (other specified nonscarring hair loss) into a subcategory with separate codes for reversible CIA, irreversible pCIA, and other specified nonscarring hair loss.

Heart failure with improved ejection fraction

Heart failure with improved ejection fraction (HFimpEF) occurs when a patient's left ventricular ejection fraction improves from 40% or less to greater than 40%. Although heart function improves, patients remain at risk of relapse and generally require continued treatment. Current ICD-10-CM guidance directs providers to code HFimpEF as chronic diastolic heart failure, even though these patients do not necessarily have diastolic dysfunction. This can misrepresent their condition and affect data accuracy. The proposal requests two new subcategories under I50.- (heart failure) for HFimpEF and combined HFimpEF with diastolic heart failure.

Laryngopharyngeal reflux disease

Laryngopharyngeal reflux disease (LPRD) occurs when stomach contents travel into the throat and voice box, causing symptoms such as hoarseness, chronic cough, throat clearing, and difficulty swallowing. Despite differing from gastroesophageal reflux disease (GERD) in anatomy and clinical presentation, LPRD is frequently coded as GERD without esophagitis. A new subcategory under J38.- (diseases of vocal cords and larynx, not elsewhere classified) is proposed, with separate codes for unspecified, direct, indirect, and other LPRD.

Neonatal supraventricular tachycardia

Neonatal supraventricular tachycardia is the most common and serious arrhythmia in newborns, involving an abnormally rapid heart rate originating above the ventricles. It typically develops during the first days or weeks of life and requires prompt diagnosis and treatment to prevent complications. Current code P29.11 (neonatal tachycardia) does not distinguish this specific arrhythmia from other forms of neonatal tachycardia. The proposal suggests expanding the code into a subcategory with separate codes for neonatal supraventricular tachycardia, other neonatal tachycardia, and unspecified neonatal tachycardia.

Segmental vitiligo

Segmental vitiligo is a distinct form of vitiligo characterized by unilateral or localized patches of depigmented skin. Unlike nonsegmental vitiligo, it differs in onset, distribution, prognosis, and treatment response. Current code L80 encompasses all forms of vitiligo without distinguishing these subtypes, limiting research and data accuracy. The proposal recommends expanding L80 into a category with separate codes for unspecified, segmental, nonsegmental, and other vitiligo.

Spasticity

Spasticity is an increase in muscle tone commonly resulting from neurological conditions or injuries, including stroke, traumatic brain and spinal cord injuries, multiple sclerosis, cerebral palsy, and ALS. Without appropriate treatment, it can lead to pain, muscle contractures, reduced mobility, and other complications. Although some existing ICD-10-CM codes reference spasticity, there is no dedicated code identifying it as a distinct clinical condition. The proposal requests a new code under G24.- (dystonia) specifically for spasticity to improve documentation, patient tracking, and research.

Editor’s note: To read the proposed code topics being considered, click here. To read additional coverage from JustCoding, click here.