2027 ICD-10-CM Diagnosis Code K75.1Phlebitis of portal vein
ICD-10-CM Codes›K00–K95›K70-K77›K75
- Billable — Valid for Submission
- MCC — Major Complication or Comorbidity
- Chronic Condition
K75.1 is a billable ICD-10-CM diagnosis code for phlebitis of portal vein. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 441 through 443, 791, 793. As a secondary diagnosis, it counts as a major complication or comorbidity (MCC) and places an inpatient stay in the highest severity level of its MS-DRG family. It does not count, however, when the principal diagnosis is one of 7 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified liver disease.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Phlebitis of portal vein
- Portal pyemia
- Portal thrombophlebitis
- Portal vein thrombosis
- Suppurative phlebitis
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to K75.1: its own notes plus those printed at K75, block K70-K77, and Chapter 11. A note printed at a category, block or chapter applies to every code under it.
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Pylephlebitis
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
- pylephlebitic liver abscess (K75.0)
- jaundice NOS (R17)
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name K75.1, its category, or a range that includes it.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Pyemia, pyemic (fever) (infection) (purulent) See Also: Sepsis;
Pylephlebitis K75.1
Pylethrombophlebitis K75.1
Pylethrombosis K75.1
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Phlebitis of Portal Vein
inflammation of the portal vein.
Patient EducationClinical
Liver Diseases
Your liver is the largest organ inside your body. It helps your body digest food, store energy, and remove poisons.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert K75.1 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About K75.1Overview
What is the ICD-10 code for phlebitis of portal vein?
The ICD-10-CM code for phlebitis of portal vein is K75.1 (sometimes written as K751). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is K75.1 (Other inflammatory liver diseases) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report phlebitis of portal vein on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does K75.1 group to?
When phlebitis of portal vein is the principal diagnosis on an inpatient stay, it groups to MS-DRG 793, 791, 442, 441, 443, with relative weights from 0.6890 to 4.2192 depending on complications. Higher weights mean higher Medicare reimbursement.
Is K75.1 a CC or MCC?
CMS lists K75.1 as an MCC (major complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it places the inpatient stay in the highest-weighted DRG of its severity family. It does not count when the principal diagnosis is one of the 7 closely related codes in its exclusion list.
Can K75.1 be reported with K75.0?
Not as a rule. The Excludes1 note on K75.1 lists "pylephlebitic liver abscess (K75.0)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
