ICD-10 code B49: Unspecified mycosis documentation guide
ICD-10 code B49 is the diagnosis code for an unspecified fungal infection, listed officially as unspecified mycosis. It is the ICD-10 code for a fungal infection that is confirmed but cannot be tied to a specific organism or site. B49 is billable and confirmed by the Centers for Medicare and Medicaid Services (CMS) and the […]
ICD-10 code I10: Essential (primary) hypertension guide
In short, ICD-10 code I10 is the diagnosis code for essential (primary) hypertension — that is, persistently high blood pressure with no clear underlying cause. Because most high blood pressure is primary rather than secondary, it is the code clinicians reach for in the large majority of hypertension cases. It also stands alone, without comorbid […]
ICD-10 code for prostate cancer: C61 (malignant neoplasm of the prostate)
C61 is the ICD-10 code for prostate cancer, malignant neoplasm of the prostate, and it’s the billable ICD-10-CM diagnosis (dx) code you report for cancer at the primary site. It sits within the C60-C63 range (malignant neoplasms of male genital organs) under the broader C00-D49 neoplasm chapter. The men’s health clinic software category is where […]
ICD-10 code for rash and other nonspecific skin eruption (R21)
ICD-10 code R21 is the diagnosis code for rash and other nonspecific skin eruption. It applies when a patient has a rash but the provider has not confirmed a specific cause. R21 sits within subcategory R20-R23 (Symptoms and signs involving the skin and subcutaneous tissue), which falls under Chapter 18 (R00-R99) of the ICD-10-CM classification: […]
ICD-10 code B03: Smallpox diagnosis code explained
ICD-10 Code B03 is the billable diagnostic code for smallpox (variola), maintained within the CDC/NCHS ICD-10-CM classification system despite the global eradication of the disease in 1980. Most coders encounter B03 in one of two contexts: public health surveillance reporting, or bioterrorism preparedness planning. Outside those two scenarios, active clinical use of this code is […]
ICD-10 code B59: Pneumocystosis
ICD-10 code B59 is the billable diagnosis code for Pneumocystosis, more often documented as Pneumocystis pneumonia (PCP). It covers pneumonia due to Pneumocystis jirovecii, the human pathogen, and the older term Pneumocystis carinii. B59 is the single billable ICD-10-CM entry for this opportunistic infection, assigned once a provider confirms the diagnosis. This reference guide covers […]
ICD-10 code A91: Dengue hemorrhagic fever
ICD-10 Code A91: Definition and clinical description ICD-10 Code A91 is the billable ICD-10-CM diagnosis code for dengue hemorrhagic fever. Maintained jointly by the Centers for Medicare and Medicaid Services (CMS) and the National Center for Health Statistics (NCHS), it has been valid and in use in every annual ICD-10-CM edition from 2016 through 2026. […]
ICD-10 code G08: Intracranial and intraspinal phlebitis
ICD-10 code G08 is a valid, billable ICD-10-CM diagnosis code for intracranial and intraspinal phlebitis and thrombophlebitis. It belongs to Chapter 6 of ICD-10-CM, which covers Diseases of the Nervous System (G00-G99), within the block G00-G09 (Inflammatory diseases of the central nervous system). The condition describes inflammation of veins (phlebitis) or inflammation with concurrent thrombosis […]
ICD-10 code K22.6: Mallory-Weiss tear (gastro-esophageal laceration-hemorrhage syndrome)
K22.6 is the billable ICD-10 code for a Mallory-Weiss tear (gastro-esophageal laceration-hemorrhage), valid for FY2026 claims.
ICD-10 code L93.0: Discoid lupus erythematosus
ICD-10 Code L93.0 is the billable diagnosis code for discoid lupus erythematosus (DLE) in the ICD-10-CM classification maintained by the Centers for Medicare and Medicaid Services (CMS) and the National Center for Health Statistics (NCHS). It is the subcode you use in place of the non-billable parent code L93, and reaching for the parent instead […]