K23 Disorders of esophagus in diseases classified elsewhere

Billable ICD-10-CM code, FY2026.

Excludes1 (never code together)

• late syphilis (A52.79)
• megaesophagus due to Chagas' disease (B57.31)
• tuberculosis (A18.83)

Code first

• underlying disease, such as:
• congenital syphilis (A50.5)

Applies from K23 Disorders of esophagus in diseases classified elsewhere

Excludes1 (never code together)

• late syphilis (A52.79)
• megaesophagus due to Chagas' disease (B57.31)
• tuberculosis (A18.83)

Code first

• underlying disease, such as:
• congenital syphilis (A50.5)

MS-DRG index

Defines the logic of DRG(s) 391-392 in MDC 06.

Approximate ICD-9-CM (GEMs)

• 530.89 Other specified disorders of esophagus (approximate)

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

• Manifestation codes as principal diagnosis: Manifestation codes describe the manifestation of an underlying disease, not the disease itself, and are not allowed as principal diagnosis.

Diagnosis Index entries for K23

• Stenosis, stenotic (cicatricial) › esophagus › syphilitic › congenital
• Stricture › esophagus › syphilitic › congenital

Nearby codes

• K23 Disorders of esophagus in diseases classified elsewhere (this code)