ICD-10 code E29.9: Testicular dysfunction, unspecified
ICD-10 code E29.9 covers testicular dysfunction with an unconfirmed cause. Use E29.1 instead once primary testicular failure is confirmed.
ICD-10 code C11.1: Malignant neoplasm of posterior wall of nasopharynx
ICD-10 code C11.1 is a billable code for malignant neoplasm of the posterior wall of the nasopharynx. Covers classification, documentation, and sequencing rules.
ICD-10 code A78: Q fever diagnosis and billing guide
ICD-10 Code A78 is the single billable code for Q fever, covering acute and chronic Coxiella burnetii infection with no subcategories.
ICD-10 code D64.1: Secondary sideroblastic anemia due to disease
ICD-10 code D64.1 is the billable code for secondary sideroblastic anemia due to disease. Sequence the underlying condition first.
ICD-10 code C18.1: Malignant neoplasm of appendix
ICD-10 code C18.1 is the billable, FY2026-valid diagnosis code for malignant neoplasm of the appendix (vermiform appendix). It covers adenocarcinoma and non-carcinoid appendix tumors under the HIPAA-compliant ICD-10-CM system, but an Excludes1 note bars reporting it with carcinoid code C7A.020. The code sits within the C18 parent category, which covers malignant neoplasms of the colon, […]
ICD-10 code D27.0: Benign neoplasm of right ovary
ICD-10 code D27.0 is the billable diagnosis code for a benign neoplasm of the right ovary. It sits within ICD-10-CM Chapter C00-D49 (Neoplasms) and the more specific block D10-D36 (Benign neoplasms, except benign neuroendocrine tumors). The code is maintained jointly by the Centers for Medicare and Medicaid Services (CMS) and the National Center for Health […]
ICD-10 code D22.4: Melanocytic nevi of scalp and neck
ICD-10 code D22.4 is the billable ICD-10-CM diagnosis code for melanocytic nevi of the scalp and neck. It establishes the medical necessity behind an excision or evaluation once a benign nevus is confirmed at either the scalp or the neck. Choosing this site-specific subcode over the unspecified D22.9 is what keeps scalp and neck nevus […]
ICD-10 code D75.0: Familial erythrocytosis billing and coding guide
ICD-10 code D75.0 captures familial erythrocytosis – a genetically driven elevation of red blood cell mass – but coders frequently misassign it to polycythemia vera (D45) or secondary polycythemia (D75.1) because the clinical presentations overlap. Getting the distinction right starts with the documentation, not the lookup tool. This reference guide covers the clinical definition, inclusion […]
ICD-10 code E29.8: Other testicular dysfunction
ICD-10 code E29.8 is a billable, male-specific ICD-10-CM code for “Other testicular dysfunction” — testicular endocrine disorders that do not meet the criteria for testicular hyperfunction (E29.0) or hypofunction (E29.1). Its primary clinical synonym is Mullerian inhibiting factor deficiency. This guide covers the billable status, clinical synonyms, Excludes1 notes, MS-DRG grouping, and documentation requirements for […]
ICD-10 code T86.31: Heart-lung transplant rejection
ICD-10 code T86.31 is the billable ICD-10-CM diagnosis code for heart-lung transplant rejection. It sits within the T86.3 subcategory (complications of heart-lung transplant) and is maintained by the Centers for Medicare and Medicaid Services (CMS) and the National Center for Health Statistics (NCHS). Coders assign it when a heart-lung recipient’s immune system mounts a response […]