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ICD-9-CM procedure code (retired)

83.21 — Open biopsy of soft tissue

ICD-9-CM was replaced by ICD-10 on October 1, 2015. These are the ICD-10-PCS equivalents from the CMS General Equivalence Mappings.

About ICD-9-CM 83.21

83.21 is an ICD-9-CM procedure code for open biopsy of soft tissue. ICD-9-CM was retired for U.S. claims on October 1, 2015, when ICD-10-PCS took over.

The CMS General Equivalence Mappings translate it to 168 ICD-10-PCS codes, such as 0K900ZX (Drainage of Head Muscle, Open Approach, Diagnostic), 0K910ZX (Drainage of Facial Muscle, Open Approach, Diagnostic) and 0K920ZX (Drainage of Right Neck Muscle, Open Approach, Diagnostic). All of these are approximate matches, so review the record to pick the right one.

ICD-10-PCS equivalents

Common questions about 83.21

What is the ICD-10 code for ICD-9 83.21?

The GEMs map 83.21 to ICD-10-PCS 0K900ZX, 0K910ZX, 0K920ZX, 0K930ZX, 0K940ZX, 0K950ZX and 162 more.

GEMs are a translation aid, not a substitute for coding from the record. The 2027 ICD-10 code set has changed since the last GEMs release in 2018. Page updated September 29, 2026.