2027 ICD-10-CM Diagnosis Code D40.8Neoplasm of uncertain behavior of other specified male genital organs

Billable — Valid for Submission
Not Chronic

ICD-10-CM D40.8

CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

D40.8 is a billable ICD-10-CM diagnosis code for neoplasm of uncertain behavior of other specified male genital organs. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 715 through 716, 722 through 724. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Neoplasms of unspecified nature or uncertain behavior.

Code Identity

ICD-10-CM Code

D40.8

Billable Status

Yes — Valid for Submission

Code Describes

Neoplasm of uncertain behavior of other specified male genital organs

Short Description

Neoplasm of uncertain behavior of oth male genital organs

Parent Code

D40

Neoplasm of uncertain behavior of male genital organs

Code Classification

ChapterC00–D49Neoplasms

SectionD37-D48Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes

CategoryD40Neoplasm of uncertain behavior of male genital organs

This CodeD40.8Neoplasm of uncertain behavior of other specified male genital organs

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

Neoplasm of prepuce
Neoplasm of uncertain behavior of body of penis
Neoplasm of uncertain behavior of epididymis
Neoplasm of uncertain behavior of glans penis
Neoplasm of uncertain behavior of penis
Neoplasm of uncertain behavior of prepuce
Neoplasm of uncertain behavior of scrotum
Neoplasm of uncertain behavior of spermatic cord
Neoplasm of uncertain behavior of vas deferens
Neoplasm of vas deferens
Penile intraepithelial neoplasia

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to D40.8: its own notes plus those printed at block D37-D48 and Chapter 2. A note printed at a category, block or chapter applies to every code under it.

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

Neoplasm of uncertain behavior of skin of male genital organs

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From Block D37-D48 Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes applies to 137 codes

neoplasms of unspecified behavior (D49.-)

Notes

General instructions on how these codes are used.

From Block D37-D48 Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes applies to 137 codes

Categories D37-D44, and D48 classify by site neoplasms of uncertain behavior, i.e., histologic confirmation whether the neoplasm is malignant or benign cannot be made.

From Chapter 2 (C00-D49) Neoplasms applies to 1,730 codes

Functional activity
All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm.
Morphology [Histology]
Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes.
Primary malignant neoplasms overlapping site boundaries
A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned.
Malignant neoplasm of ectopic tissue
Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name D40.8, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming D40.8: they are not reported together with it, unless the two conditions are unrelated.

D48.5 Neoplasm of uncertain behavior of skin
neoplasm of uncertain behavior of skin of genital organs (D39.8, D40.8)

Excludes2 1

These codes carry an Excludes2 note naming D40.8: its condition is not part of those codes, and both may be reported when the patient has both.

D49 Neoplasms of unspecified behavior
neoplasms of uncertain behavior (D37-D44, D48) names D37-D44, which includes this code

Notes 1

These notes mention D40.8.

Block D37-D48 Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes
Categories D37-D44, and D48 classify by site neoplasms of uncertain behavior, i.e., histologic confirmation whether the neoplasm is malignant or benign cannot be made. names D37-D44, which includes this code

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR NEO072

Neoplasms of unspecified nature or uncertain behavior

Default principal diagnosis: inpatient Yes · outpatient Yes

Table of NeoplasmsClinical

Anatomical sites in the Table of Neoplasms that reference this code family.

Filter table of neoplasms:

Site	Malig. Primary	Malig. Secondary	Ca in situ	Benign	Uncertain	Unspec.
cord (true) (vocal) › spermatic	C63.1	C79.82	D07.69	D29.8	D40.8	D49.59
corpus › cavernosum	C60.2	C79.82	D07.4	D29.0	D40.8	D49.59
corpus › penis	C60.2	C79.82	D07.4	D29.0	D40.8	D49.59
ejaculatory duct	C63.7	C79.82	D07.69	D29.8	D40.8	D49.59
epididymis	C63.0	C79.82	D07.69	D29.3	D40.8	D49.59
foreskin	C60.0	C79.82	D07.4	D29.0	D40.8	D49.59
genital organ or tract › male NEC › specified site NEC	C63.7	C79.82	D07.69	D29.8	D40.8	D49.59
glans penis	C60.1	C79.82	D07.4	D29.0	D40.8	D49.59
Mullerian duct › male	C63.7	C79.82	D07.69	D29.8	D40.8	D49.59
penis	C60.9	C79.82	D07.4	D29.0	D40.8	D49.59
penis › body	C60.2	C79.82	D07.4	D29.0	D40.8	D49.59
penis › corpus (cavernosum)	C60.2	C79.82	D07.4	D29.0	D40.8	D49.59
penis › glans	C60.1	C79.82	D07.4	D29.0	D40.8	D49.59
penis › skin NEC	C60.9	C79.82	D07.4	D29.0	D40.8	D49.59
prepuce	C60.0	C79.82	D07.4	D29.0	D40.8	D49.59
scrotum (skin)	C63.2	C79.82	D07.61	D29.4	D40.8	D49.59
seminal vesicle	C63.7	C79.82	D07.69	D29.8	D40.8	D49.59
skin NOS › male genital organs	C63.9	C79.82	D07.60	D29.9	D40.8	D49.59
skin NOS › male genital organs › penis	C60.9	C79.82	D07.4	D29.0	D40.8	D49.59
skin NOS › male genital organs › prepuce	C60.0	C79.82	D07.4	D29.0	D40.8	D49.59
skin NOS › male genital organs › scrotum	C63.2	C79.82	D07.61	D29.4	D40.8	D49.59
skin NOS › penis NEC	C60.9	C79.82	D07.4	D29.0	D40.8	D49.59
skin NOS › prepuce	C60.0	C79.82	D07.4	D29.0	D40.8	D49.59
skin NOS › scrotum	C63.2	C79.82	D07.61	D29.4	D40.8	D49.59
spermatic cord	C63.1	C79.82	D07.69	D29.8	D40.8	D49.59
tunica vaginalis	C63.7	C79.82	D07.69	D29.8	D40.8	D49.59
vas deferens	C63.1	C79.82	D07.69	D29.8	D40.8	D49.59
vesicle, seminal	C63.7	C79.82	D07.69	D29.8	D40.8	D49.59
wolffian (body) (duct) › male	C63.7	C79.82	D07.69	D29.8	D40.8	D49.59

Patient EducationClinical

Penis Disorders

Problems with the penis can cause pain and affect a man's sexual function and fertility. Penis disorders include:

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert D40.8 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM

236.6 Unc behav neo male NEC

Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.

FY 2017–2026No changes

FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About D40.8Overview

What is the ICD-10 code for neoplasm of uncertain behavior of other specified male genital organs?

The ICD-10-CM code for neoplasm of uncertain behavior of other specified male genital organs is D40.8 (sometimes written as D408). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is D40.8 (Neoplasm of uncertain behavior of male genital organs) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report neoplasm of uncertain behavior of other specified male genital organs on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does D40.8 group to?

When neoplasm of uncertain behavior of other specified male genital organs is the principal diagnosis on an inpatient stay, it groups to MS-DRG 716, 723, 724, 715, 722, with relative weights from 0.5709 to 2.2896 depending on complications. Higher weights mean higher Medicare reimbursement.

Can D40.8 be reported with a code from D49?

Not as a rule. The Excludes1 note at block D37-D48, which applies to D40.8, lists "neoplasms of unspecified behavior (D49.-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

What is the ICD-9 equivalent of D40.8?

Under the General Equivalence Mappings, neoplasm of uncertain behavior of other specified male genital organs converts to ICD-9-CM 236.6 (unc behav neo male NEC). The mapping is approximate, so confirm the match fits the documentation.

Indicator	Meaning	CMS pays CC/MCC DRG
Y	Diagnosis was present at the time of inpatient admission	Yes
N	Diagnosis was not present at the time of admission	No
U	Documentation is insufficient to determine	No
W	Clinically undetermined	Yes
1	Unreported, exempt from POA reporting	No