Z31.41 Encounter for fertility testing

Billable ICD-10-CM code, FY2026. Exempt from present-on-admission (POA) reporting.

Applicable to

• Encounter for fallopian tube patency testing
• Encounter for sperm count for fertility testing

Applies from Z31 Encounter for procreative management

Excludes2 (not included here)

• complications associated with artificial fertilization (N98.-)
• female infertility (N97.-)
• male infertility (N46.-)

Applies from Z31.4 Encounter for procreative investigation and testing

Excludes1 (never code together)

• postvasectomy sperm count (Z30.8)

MS-DRG index

Defines the logic of DRG(s) 951 in MDC 23.

Approximate ICD-9-CM (GEMs)

• V26.21 Fertility testing

Medicare Code Edits (MCE v43.1 (April 2026))

• Unacceptable principal diagnosis: These codes describe a circumstance which influences care but is not a current illness or injury, or capture only an underlying condition, and are unacceptable as principal diagnosis.

Code annotations containing back-references to Z31.41

Back-references to Z31.41

• Type 1 Excludes: Z30.8 Encounter for other contraceptive management ("sperm count for fertility testing (Z31.41)")

Back-references to Z31.4

• Type 1 Excludes: Z13.7 Encounter for screening for genetic and chromosomal anomalies ("genetic testing for procreative management (Z31.4-)")

Back-references to Z31

• Type 2 Excludes: Z70 Counseling related to sexual attitude, behavior and orientation ("contraceptive or procreative counseling (Z30-Z31)")
• Type 2 Excludes: Z71 Persons encountering health services for other counseling and medical advice, not elsewhere classified ("contraceptive or procreation counseling (Z30-Z31)")

Diagnosis Index entries for Z31.41

• Fallopian › insufflation
• Insufflation, fallopian
• Sperm counts (fertility testing)
• Test, tests, testing (for) › fertility
• Test, tests, testing (for) › procreative › fertility

Nearby codes

• Z31 Encounter for procreative management
• Z31.0 Encounter for reversal of previous sterilization
• Z31.4 Encounter for procreative investigation and testing
• Z31.41 Encounter for fertility testing (this code)
• Z31.42 Aftercare following sterilization reversal
• Z31.43 Encounter for genetic testing of female for procreative management
• Z31.430 Encounter of female for testing for genetic disease carrier status for procreative management
• Z31.438 Encounter for other genetic testing of female for procreative management
• Z31.44 Encounter for genetic testing of male for procreative management