O99.711 Diseases of the skin and subcutaneous tissue complicating pregnancy, first trimester

Billable ICD-10-CM code, FY2026.

Applies from O99 Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium

Includes

• conditions which complicate the pregnant state, are aggravated by the pregnancy or are a main reason for obstetric care

Excludes2 (not included here)

• when the reason for maternal care is that the condition is known or suspected to have affected the fetus (O35-O36)

Use additional code

• code to identify specific condition

Applies from O99.7 Diseases of the skin and subcutaneous tissue complicating pregnancy, childbirth and the puerperium

Applicable to

• Conditions in L00-L99

Excludes2 (not included here)

• herpes gestationis (O26.4)
• pruritic urticarial papules and plaques of pregnancy (PUPPP) (O26.86)

MS-DRG index

Defines the logic of DRG(s) 817-819 in MDC 14.

Approximate ICD-9-CM (GEMs)

• 648.91 Other current conditions classifiable elsewhere of mother, delivered, with or without mention of antepartum condition (approximate)
• 648.93 Other current conditions classifiable elsewhere of mother, antepartum condition or complication (approximate)

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

• Maternity diagnoses (age 9 through 64): Age conflict edit. These diagnoses are clinically expected only in patients age 9 through 64.

Nearby codes

• O99.619 Diseases of the digestive system complicating pregnancy, unspecified trimester
• O99.62 Diseases of the digestive system complicating childbirth
• O99.63 Diseases of the digestive system complicating the puerperium
• O99.7 Diseases of the skin and subcutaneous tissue complicating pregnancy, childbirth and the puerperium
• O99.71 Diseases of the skin and subcutaneous tissue complicating pregnancy
• O99.711 Diseases of the skin and subcutaneous tissue complicating pregnancy, first trimester (this code)
• O99.712 Diseases of the skin and subcutaneous tissue complicating pregnancy, second trimester
• O99.713 Diseases of the skin and subcutaneous tissue complicating pregnancy, third trimester
• O99.719 Diseases of the skin and subcutaneous tissue complicating pregnancy, unspecified trimester
• O99.72 Diseases of the skin and subcutaneous tissue complicating childbirth
• O99.73 Diseases of the skin and subcutaneous tissue complicating the puerperium