K75.0 vs K75.1
K75.0 and K75.1 can never be reported together. ICD-10-CM declares them mutually exclusive with an Excludes1 note, meaning the two conditions cannot occur in the same patient — so exactly one of them is correct for any given encounter.
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 (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)
- Abscess › liver (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)
- Inflammation, inflamed, inflammatory › liver › suppurative (with exudation)
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 (infective) (pyemic) (septic) (suppurative)
- Pyemia, pyemic › liver (fever) (infection) (purulent)
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