ICD-10 Code for Lymphadenitis
The ICD-10-CM code for lymphadenitis is I88.9 — Nonspecific lymphadenitis, unspecified. This is the code the Alphabetic Index gives for lymphadenitis with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
I88.9 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.
Which lymphadenitis code should you use?
The Alphabetic Index lists 25 codes under Lymphadenitis. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
| with ectopic or molar pregnancy | O08.0 | Genital tract and pelvic infection following ectopic and molar pregnancy | |
| acute | L04.9 | Acute lymphadenitis, unspecified | |
| anthracosis | J60 | Coalworker's pneumoconiosis | |
| any site, except mesenteric | I88.9 | Nonspecific lymphadenitis, unspecified | |
| chancroidal | A57 | Chancroid | |
| chronic | I88.1 | Chronic lymphadenitis, except mesenteric | |
| following ectopic or molar pregnancy | O08.0 | Genital tract and pelvic infection following ectopic and molar pregnancy | |
| gonorrheal | A54.89 | Other gonococcal infections | |
| mesenteric | I88.0 | Nonspecific mesenteric lymphadenitis | |
| mycobacterial | A31.8 | Other mycobacterial infections | |
| regional, nonbacterial | I88.8 | Other nonspecific lymphadenitis | |
| subacute, unspecified site | I88.1 | Chronic lymphadenitis, except mesenteric | |
| syphilitic | A51.49 | Other secondary syphilitic conditions | |
| venereal | A55 | Chlamydial lymphogranuloma (venereum) |
Lymphadenitis acute
| axilla | L04.2 | Acute lymphadenitis of upper limb | |
| face | L04.0 | Acute lymphadenitis of face, head and neck | |
| head | L04.0 | Acute lymphadenitis of face, head and neck | |
| hip | L04.3 | Acute lymphadenitis of lower limb | |
| neck | L04.0 | Acute lymphadenitis of face, head and neck | |
| shoulder | L04.2 | Acute lymphadenitis of upper limb | |
| specified site NEC | L04.8 | Acute lymphadenitis of other sites | |
| trunk | L04.1 | Acute lymphadenitis of trunk | |
| limb › lower | L04.3 | Acute lymphadenitis of lower limb | |
| limb › upper | L04.2 | Acute lymphadenitis of upper limb |
Lymphadenitis any site, except mesenteric
Lymphadenitis breast
| puerperal, postpartum | O91.22 | Nonpurulent mastitis associated with the puerperium |
Lymphadenitis chronic
| mesenteric | I88.0 | Nonspecific mesenteric lymphadenitis |
Lymphadenitis due to
| Brugia | B74.1 | Filariasis due to Brugia malayi | |
| chlamydial lymphogranuloma | A55 | Chlamydial lymphogranuloma (venereum) | |
| diphtheria | A36.89 | Other diphtheritic complications | |
| lymphogranuloma venereum | A55 | Chlamydial lymphogranuloma (venereum) | |
| Wuchereria bancrofti | B74.0 | Filariasis due to Wuchereria bancrofti | |
| Brugia › timori | B74.2 | Filariasis due to Brugia timori |
Lymphadenitis mesenteric
Lymphadenitis syphilitic
| late | A52.79 | Other symptomatic late syphilis |
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources