K64.5 Perianal venous thrombosis

Billable ICD-10-CM code, FY2026.

Applicable to

• External hemorrhoids with thrombosis
• Perianal hematoma
• Thrombosed hemorrhoids NOS

Applies from K64 Hemorrhoids and perianal venous thrombosis

Includes

• piles

Excludes1 (never code together)

• hemorrhoids complicating childbirth and the puerperium (O87.2)
• hemorrhoids complicating pregnancy (O22.4)

MS-DRG index

Defines the logic of DRG(s) 393-395 in MDC 06.

Approximate ICD-9-CM (GEMs)

• 455.4 External thrombosed hemorrhoids (approximate)
• 455.7 Unspecified thrombosed hemorrhoids (approximate)

Code annotations containing back-references to K64.5

Back-references to K64

• Type 2 Excludes: K62 Other diseases of anus and rectum ("hemorrhoids (K64.-)")

Diagnosis Index entries for K64.5

• Hematoma (traumatic) (skin surface intact) › perianal (nontraumatic)
• Hemorrhoids (bleeding) (without mention of degree) › external › with › thrombosis
• Hemorrhoids (bleeding) (without mention of degree) › thrombosed
• Thrombosis, thrombotic (bland) (multiple) (progressive) (silent) (vessel) › anal
• Thrombosis, thrombotic (bland) (multiple) (progressive) (silent) (vessel) › perianal venous
• Thrombosis, thrombotic (bland) (multiple) (progressive) (silent) (vessel) › vein (acute) › perianal
• Thrombosis, thrombotic (bland) (multiple) (progressive) (silent) (vessel) › venous, perianal

Nearby codes

• K64.0 First degree hemorrhoids
• K64.1 Second degree hemorrhoids
• K64.2 Third degree hemorrhoids
• K64.3 Fourth degree hemorrhoids
• K64.4 Residual hemorrhoidal skin tags
• K64.5 Perianal venous thrombosis (this code)
• K64.8 Other hemorrhoids
• K64.9 Unspecified hemorrhoids