FY2027
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Excludes1 pair

K75.0 vs K75.1

K75.0 and K75.1 are not coded together. ICD-10-CM declares them mutually exclusive with an Excludes1 note — the two conditions are not expected to occur together, so exactly one of them is normally correct for a given encounter. The Official Guidelines carve out one exception: if the two conditions are clearly unrelated to each other, both may be reported.

The official note, declared on K75.0
pylephlebitis without liver abscess (K75.1)
K75.0

Abscess of liver

Billable
Chapter 11
Diseases of the digestive system
Section
K70-K77
Use when the record says
  • Cholangitic hepatic abscess
  • Hematogenic hepatic abscess
  • Hepatic abscess NOS
  • Lymphogenic hepatic abscess
  • Pylephlebitic hepatic abscess
Indexed under
  • Abscess › hepatic (cholangitic) (hematogenic) (lymphogenic) (pylephlebitic)
  • Abscess › liver (cholangitic) (hematogenic) (lymphogenic) (pylephlebitic) (pyogenic)
  • Inflammation, inflamed, inflammatory › liver › suppurative
K75.1

Phlebitis of portal vein

Billable
Chapter 11
Diseases of the digestive system
Section
K70-K77
Use when the record says
  • Pylephlebitis
Indexed under
  • Pylephlebitis
  • Pylethrombophlebitis
  • Pylethrombosis
  • Phlebitis › portal (vein)
  • Pyemia, pyemic › liver

Excludes1 is not always absolute: where two conditions covered by the note are genuinely unrelated, CMS guidance permits reporting both. Document the reasoning rather than assuming it. More on Excludes1 vs Excludes2 · FY2027