K75.1 Phlebitis of portal vein

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

Applicable to

• Pylephlebitis

Excludes1 (never code together)

• pylephlebitic liver abscess (K75.0)

Applies from K75 Other inflammatory liver diseases

Excludes2 (not included here)

• toxic liver disease (K71.-)

MS-DRG index

Defines the logic of DRG(s) 441-443 in MDC 07.

Approximate ICD-9-CM (GEMs)

• 572.1 Portal pyemia (approximate)

Code annotations containing back-references to K75.1

Back-references to K75.1

• Type 2 Excludes: I81 Portal vein thrombosis ("phlebitis of portal vein (K75.1)")
• Type 1 Excludes: K75.0 Abscess of liver ("pylephlebitis without liver abscess (K75.1)")

Diagnosis Index entries for K75.1

• Phlebitis (infective) (pyemic) (septic) (suppurative) › portal (vein)
• Pyemia, pyemic (fever) (infection) (purulent) › liver
• Pyemia, pyemic (fever) (infection) (purulent) › portal
• Pylephlebitis
• Pylethrombophlebitis
• Pylethrombosis
• Thrombophlebitis › portal (vein)

Nearby codes

• K75 Other inflammatory liver diseases
• K75.0 Abscess of liver
• K75.1 Phlebitis of portal vein (this code)
• K75.2 Nonspecific reactive hepatitis
• K75.3 Granulomatous hepatitis, not elsewhere classified
• K75.4 Autoimmune hepatitis
• K75.8 Other specified inflammatory liver diseases
• K75.81 Nonalcoholic steatohepatitis (NASH)