Z31.42 Aftercare following sterilization reversal

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

Applicable to

• Sperm count following sterilization reversal

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)

• V26.22 Aftercare following sterilization reversal

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 Z31.42

Back-references to Z31.42

• Type 1 Excludes: Z30.8 Encounter for other contraceptive management ("sperm count following sterilization reversal (Z31.42)")
• Type 1 Excludes: Z48.816 Encounter for surgical aftercare following surgery on the genitourinary system ("encounter for aftercare following sterilization reversal (Z31.42)")

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 Z31.42

• Admission (for) › poststerilization (for restoration) › aftercare
• Admission (for) › restoration of organ continuity (poststerilization) › aftercare
• Admission (for) › tuboplasty following previous sterilization › aftercare
• Admission (for) › vasoplasty following previous sterilization › aftercare
• Restoration (of) › organ continuity from previous sterilization (tuboplasty) (vasoplasty) › aftercare
• Sperm counts (fertility testing) › postvasectomy › reversal
• Tuboplasty, after previous sterilization › aftercare
• Vasoplasty, after previous sterilization › aftercare

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
• Z31.42 Aftercare following sterilization reversal (this code)
• 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
• Z31.440 Encounter of male for testing for genetic disease carrier status for procreative management