Neoplasm of uncertain behavior of male genital organs (D40) ICD-10-CM
The D40 code range covers neoplasm of uncertain behavior of male genital organs with 8 ICD-10-CM diagnosis codes. 6 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Codes in the D40 Range 8 codes · 6 billable
- D40 Neoplasm of uncertain behavior of male genital organsNon-billable
- D40.0 Neoplasm of uncertain behavior of prostate
- D40.1 Neoplasm of uncertain behavior of testisNon-billable
- D40.10 Neoplasm of uncertain behavior of unspecified testis
- D40.11 Neoplasm of uncertain behavior of right testis
- D40.12 Neoplasm of uncertain behavior of left testis
- D40.8 Neoplasm of uncertain behavior of other specified male genital organs
- D40.9 Neoplasm of uncertain behavior of male genital organ, unspecified
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the D40 range.
Epididymis
The convoluted cordlike structure attached to the posterior of the TESTIS. Epididymis consists of the head (caput), the body (corpus), and the tail (cauda). A network of ducts leaving the testis joins into a common epididymal tubule proper which provides the transport, storage, and maturation of SPERMATOZOA.
Foreskin
The double-layered skin fold that covers the GLANS PENIS, the head of the penis.
Gonadoblastoma
A complex neoplasm composed of a mixture of gonadal elements, such as large primordial GERM CELLS, immature SERTOLI CELLS or GRANULOSA CELLS of the sex cord, and gonadal stromal cells. Gonadoblastomas are most often associated with gonadal dysgenesis, 46, XY.
Spermatic Cord
Either of a pair of tubular structures formed by DUCTUS DEFERENS; ARTERIES; VEINS; LYMPHATIC VESSELS; and nerves. The spermatic cord extends from the deep inguinal ring through the INGUINAL CANAL to the TESTIS in the SCROTUM.
Spermatic Cord Torsion
The twisting of the SPERMATIC CORD due to an anatomical abnormality that left the TESTIS mobile and dangling in the SCROTUM. The initial effect of testicular torsion is obstruction of venous return. Depending on the duration and degree of cord rotation, testicular symptoms range from EDEMA to interrupted arterial flow and testicular pain. If blood flow to testis is absent for 4 to 6 h, SPERMATOGENESIS may be permanently lost.
Sterilization Reversal
Procedures to reverse the effect of REPRODUCTIVE STERILIZATION and to regain fertility. Reversal procedures include those used to restore the flow in the FALLOPIAN TUBE or the VAS DEFERENS.
Vas Deferens
The excretory duct of the testes that carries SPERMATOZOA. It rises from the SCROTUM and joins the SEMINAL VESICLES to form the ejaculatory duct.
About the D40 Code Range
ICD-10 code section D40 covers neoplasms of uncertain behavior affecting male genital organs. These codes are used when a tumor's nature is unclear—neither clearly benign nor malignant—across various male reproductive sites.
This section includes specific codes like D40.0 for neoplasms of uncertain behavior of the prostate, sometimes referred to as a phyllodes tumor of prostate. Codes D40.1 and its subcategories (D40.10, D40.11, and D40.12) address uncertain behavior neoplasms of the testis, including variants such as gonadoblastoma, Leydig cell tumor, and Sertoli cell tumor. For other specified male genital organs, like the penis, scrotum, or epididymis, the code D40.8 is used, encompassing terms like penile intraepithelial neoplasia or neoplasms of the vas deferens and spermatic cord. When the precise organ is unspecified, D40.9 applies. These codes help medical coders distinguish tumors with unclear malignant potential and ensure accurate documentation and classification of male genital neoplasms.
Questions About This Page
How many billable codes are in the D40 range?
Of the 8 codes in this range, 6 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the D40 range classify?
The range classifies neoplasm of uncertain behavior of male genital organs. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
