I88.1 Chronic lymphadenitis, except mesenteric

Billable ICD-10-CM code, FY2026.

Applicable to

• Adenitis
• Lymphadenitis

Applies from I88 Nonspecific lymphadenitis

Excludes1 (never code together)

• acute lymphadenitis, except mesenteric (L04.-)
• enlarged lymph nodes NOS (R59.-)
• human immunodeficiency virus [HIV] disease resulting in generalized lymphadenopathy (B20)

MS-DRG index

Defines the logic of DRG(s) 814-816 in MDC 16.

Approximate ICD-9-CM (GEMs)

• 289.1 Chronic lymphadenitis

Code annotations containing back-references to I88.1

Back-references to I88.1

• Type 2 Excludes: D75 Other and unspecified diseases of blood and blood-forming organs ("chronic lymphadenitis (I88.1)")
• Type 1 Excludes: L04 Acute lymphadenitis ("chronic or subacute lymphadenitis, except mesenteric (I88.1)")
• Type 1 Excludes: R59 Enlarged lymph nodes ("chronic lymphadenitis (I88.1)")

Diagnosis Index entries for I88.1

• Adenitis › axillary › chronic or subacute
• Adenitis › cervical › chronic or subacute
• Adenitis › chronic, unspecified site
• Adenitis › groin › chronic or subacute
• Adenitis › inguinal › chronic or subacute
• Adenitis › lymph gland or node, except mesenteric › chronic or subacute
• Adenitis › subacute, unspecified site
• Lymphadenitis › any site, except mesenteric › chronic
• Lymphadenitis › any site, except mesenteric › subacute
• Lymphadenitis › chronic
• Lymphadenitis › subacute, unspecified site

Nearby codes

• I88 Nonspecific lymphadenitis
• I88.0 Nonspecific mesenteric lymphadenitis
• I88.1 Chronic lymphadenitis, except mesenteric (this code)
• I88.8 Other nonspecific lymphadenitis
• I88.9 Nonspecific lymphadenitis, unspecified