ICD-10-CM 2027
ICD-10 code for CIDP
Chronic inflammatory demyelinating polyneuritis
From the official ICD-10-CM alphabetic index entry “CIDP (chronic inflammatory demyelinating polyneuropathy )”. Page updated September 29, 2026.
About coding CIDP
The ICD-10-CM code for CIDP is G61.81 (Chronic inflammatory demyelinating polyneuritis).
Within G61.8 (other inflammatory polyneuropathies), G61.81 is specifically for chronic inflammatory demyelinating polyneuritis. Related codes cover multifocal motor neuropathy (G61.82) and other inflammatory polyneuropathies (G61.89).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 073 (Cranial and Peripheral Nerve Disorders with MCC, relative weight 1.5779) and DRG 074 (Cranial and Peripheral Nerve Disorders without MCC, relative weight 1.0173), in MDC 01 (Diseases and Disorders of the Nervous System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about CIDP ICD-10 codes
What is the ICD-10 code for CIDP?
- G61.81 — Chronic inflammatory demyelinating polyneuritis.
Is G61.81 billable?
- Yes. G61.81 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can G61.81 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict G61.81 as a principal diagnosis.
Is G61.81 a CC or MCC?
- G61.81 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.