N98.1 Hyperstimulation of ovaries

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applicable to

• Hyperstimulation of ovaries NOS
• Hyperstimulation of ovaries associated with induced ovulation

MS-DRG index

Defines the logic of DRG(s) 919-921 in MDC 21.

Approximate ICD-9-CM (GEMs)

• 256.1 Other ovarian hyperfunction (approximate)
• 997.99 Complications affecting other specified body systems, not elsewhere classified (approximate)

Code annotations containing back-references to N98.1

Back-references to N98

• Type 2 Excludes: Z31 Encounter for procreative management ("complications associated with artificial fertilization (N98.-)")

Diagnosis Index entries for N98.1

• Complication (s) (from) (of) › artificial › fertilization or insemination › hyperstimulation of ovaries
• Hyperstimulation, ovaries (associated with induced ovulation)

Nearby codes

• N98 Complications associated with artificial fertilization
• N98.0 Infection associated with artificial insemination
• N98.1 Hyperstimulation of ovaries (this code)
• N98.2 Complications of attempted introduction of fertilized ovum following in vitro fertilization
• N98.3 Complications of attempted introduction of embryo in embryo transfer
• N98.8 Other complications associated with artificial fertilization
• N98.9 Complication associated with artificial fertilization, unspecified