ICD-10 Code for Lymphadenitis

The default ICD-10-CM 2027 code for lymphadenitis is I88.9 – Nonspecific lymphadenitis, unspecified. More specific codes depend on the details documented, as listed in the official index (25 codes, 25 billable).

Main code: I88.9 – Nonspecific lymphadenitis, unspecified
Billable: Yes

Index entries for Lymphadenitis

with ectopic or molar pregnancy – O08.0
acute – L04.9
- axilla – L04.2
- face – L04.0
- head – L04.0
- hip – L04.3
- limb
  - lower – L04.3
  - upper – L04.2
- neck – L04.0
- shoulder – L04.2
- specified site NEC – L04.8
- trunk – L04.1
anthracosis (occupational) – J60
any site, except mesenteric – I88.9
- chronic – I88.1
- subacute – I88.1
breast
- gestational – see Mastitis, obstetric
- puerperal, postpartum (nonpurulent) – O91.22
chancroidal (congenital) – A57
chronic – I88.1
- mesenteric – I88.0
due to
- Brugia (malayi) – B74.1
  - timori – B74.2
- chlamydial lymphogranuloma – A55
- diphtheria (toxin) – A36.89
- lymphogranuloma venereum – A55
- Wuchereria bancrofti – B74.0
following ectopic or molar pregnancy – O08.0
gonorrheal – A54.89
infective – see Lymphadenitis, acute
mesenteric (acute) (chronic) (nonspecific) (subacute) – I88.0
- due to Salmonella typhi – A01.09
- tuberculous – A18.39
mycobacterial – A31.8
purulent – see Lymphadenitis, acute
pyogenic – see Lymphadenitis, acute
regional, nonbacterial – I88.8
septic – see Lymphadenitis, acute
subacute, unspecified site – I88.1
suppurative – see Lymphadenitis, acute
syphilitic (early) (secondary) – A51.49
- late – A52.79
tuberculous – see Tuberculosis, lymph gland
venereal (chlamydial) – A55

How to choose the right code

Start with the main term, then pick the indented subterm that matches the documentation (type, cause, site, laterality, episode of care). Always confirm the code in the tabular list: follow its Excludes1/Excludes2, “code first” and “use additional code” notes, and add a 7th character where required.

Source: CDC/NCHS ICD-10-CM FY2027 alphabetic index.