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ICD-9-CM procedure code (retired)

01.16 — Intracranial oxygen monitoring

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 01.16

01.16 is an ICD-9-CM procedure code for intracranial oxygen monitoring. 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 6 ICD-10-PCS codes, such as 4A003RD (Measurement of Intracranial Saturation, Percutaneous Approach), 4A007RD (Measurement of Intracranial Saturation, Via Natural or Artificial Opening) and 4A008RD (Measurement of Intracranial Saturation, Via Natural or Artificial Opening Endoscopic). All of these are approximate matches, so review the record to pick the right one.

ICD-10-PCS equivalents

Common questions about 01.16

What is the ICD-10 code for ICD-9 01.16?

The GEMs map 01.16 to ICD-10-PCS 4A003RD, 4A007RD, 4A008RD, 4A103RD, 4A107RD and 4A108RD.

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.