ICD-10-CM Tabular Index · Chapter 9 · FY 2026 I80–I89
Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified (I80-I89) ICD-10-CM
The I80–I89 section covers diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified with 396 ICD-10-CM diagnosis codes, of which 304 are billable in fiscal year 2026. The section is organized into the 9 code ranges listed below.
✓ Built from the official CMS FY 2026 datasetEffective Oct 1, 2025 – Sep 30, 2026
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the I80–I89 Code Range
ICD-10 codes I80 through I89 are used to classify a wide range of diseases affecting veins, lymphatic vessels, and lymph nodes that are not classified elsewhere. This includes inflammatory conditions like phlebitis and thrombophlebitis, varicose veins with or without complications, embolism and thrombosis of various veins, as well as noninfective lymphatic disorders such as lymphedema and lymphangitis.
The I80 series focuses on phlebitis and thrombophlebitis involving superficial and deep veins, often tagged as "acute phlebitis," covering specific veins like femoral, popliteal, tibial, and iliac, with synonyms such as "superficial thrombophlebitis" or "deep venous thrombosis." Codes from I81 and I82 describe portal vein thrombosis, Budd-Chiari syndrome, and other venous embolisms or thromboses in major veins including upper and lower extremity veins, with distinctions between acute and chronic conditions. The I83 category deals with varicose veins of the lower extremities including those with ulcers, inflammation, pain, or other complications, also noting asymptomatic presentations. Codes I85 and I86 address esophageal and other varices such as gastric and pelvic varices. The I87 range includes other venous disorders like postthrombotic syndrome, venous insufficiency, and venous compression syndromes. Lastly, I88 and I89 relate to nonspecific and other noninfective lymphadenitis and lymphatic vessel disorders, covering varied conditions such as lymphedema (primary, secondary, or syndromic) and lymphangitis, with relevant synonyms to aid in precise coding.
Questions About This Page
How many codes are in the I80-I89 range?
The I80-I89 range contains 396 ICD-10-CM diagnosis codes in FY 2026. 304 of them are billable, and the rest are category headers that organize the section.
What conditions does I80-I89 cover?
The range covers diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
endophlebitis
inflammation, vein
periphlebitis
suppurative phlebitis
Code First
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
, if applicable: phlebitis and thrombophlebitis complicating abortion, ectopic or molar pregnancy O00O07O08.7
phlebitis and thrombophlebitis complicating pregnancy, childbirth and the puerperium O22O87
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
venous embolism and thrombosis of lower extremities I82.4I82.5I82.81
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
Portal (vein) obstruction
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
chylocele, tunica vaginalis nonfilarial NOS N50.89
