ICD-10 code I39: Endocarditis and heart valve disorders in diseases classified elsewhere
ICD-10 Code I39, “Endocarditis and heart valve disorders in diseases classified elsewhere,” is a billable manifestation code for valve involvement that develops as part of a disease classified in another ICD-10-CM chapter. Because it records a manifestation rather than a primary cardiac disease, I39 is never sequenced first: the underlying disease is coded first, and […]
ICD-10 code I66.3: Occlusion and stenosis of cerebellar arteries
ICD-10 code I66.3 is a billable ICD-10-CM diagnosis code for occlusion and stenosis of cerebellar arteries that does not result in cerebral infarction. It belongs to the I66 category and is valid for the FY2026 coding year. The distinction between I66.3 and the I63.x infarction codes is the central coding decision: I66.3 applies only when […]
ICD-10 code L83: Acanthosis nigricans diagnosis and billing guide
ICD-10 code L83 is billable for acanthosis nigricans; document etiology, site, and sequencing to prevent claim denials.
ICD-10 code L57.5: Actinic granuloma coding guide
ICD-10 Code L57.5 is a billable, specific code for actinic granuloma, a granulomatous skin reaction caused by chronic ultraviolet or other nonionizing radiation exposure. It must be paired with an external cause code (W89 or W90) identifying the radiation source. Submitting L57.5 without that external cause code is the most common reason these claims are […]
ICD-10 code L42: Pityriasis rosea diagnosis and billing guide
ICD-10 code L42 is the billable diagnostic code for pityriasis rosea, a self-limiting papulosquamous skin disorder of unknown cause. It sits in the L40-L45 block of Chapter 12 and is a terminal code, so no additional digits are needed to bill it. This guide covers L42’s clinical description, recognized synonyms, related and differential codes, the […]
ICD-10 code L01.1: Impetiginization of other dermatoses
ICD-10 code L01.1 (Impetiginization of other dermatoses) is a billable, specific ICD-10-CM diagnosis code valid for the 2026 coding year. It sits within the L00-L08 block (Infections of the skin and subcutaneous tissue) and describes secondary bacterial infection that develops on top of a pre-existing, documented skin condition rather than presenting as primary impetigo in […]
ICD-10 code C73: Malignant neoplasm of thyroid gland
The C73 ICD-10 code is the billable ICD-10-CM diagnosis code for malignant neoplasm of the thyroid gland. One code covers every histological subtype of thyroid carcinoma – papillary, follicular, medullary, and anaplastic – with no subcodes beneath it. A confirmed benign thyroid growth is coded to D34 instead, and a neoplasm of uncertain behavior to […]
ICD-10 code C54.2: Malignant neoplasm of myometrium
ICD-10 Code C54.2 is the billable diagnosis code for malignant neoplasm of the myometrium, the smooth-muscle wall of the uterus. It is most commonly assigned for uterine leiomyosarcoma confirmed by surgical pathology, and it applies only when documentation specifies myometrial involvement rather than the endometrium or an unspecified corpus uteri site. This reference covers the […]
ICD-10 code D10.6: Benign neoplasm of nasopharynx
ICD-10 Code D10.6 is the billable ICD-10-CM diagnosis code for benign neoplasm of nasopharynx. It is valid for HIPAA-covered transactions for FY2026, covering the period October 1, 2025 through September 30, 2026. The code is maintained jointly by the Centers for Medicare and Medicaid Services (CMS) and the National Center for Health Statistics (NCHS) under […]
ICD-10 code S82.242N: Displaced spiral tibial shaft fracture
ICD-10 code S82.242N: Definition and clinical description ICD-10 code S82.242N is a billable ICD-10-CM code describing a displaced spiral fracture of the shaft of the left tibia, at a subsequent encounter, for an open fracture type IIIA, IIIB, or IIIC with nonunion. The 7th character N marks two clinical facts at once: the original injury […]