ICD-9-CM procedure code (retired)
00.94 — Intra-operative neurophysiologic 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 00.94
00.94 is an ICD-9-CM procedure code for intra-operative neurophysiologic 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 30 ICD-10-PCS codes, such as 4A1004G (Monitoring of Central Nervous Electrical Activity, Intraoperative, Open Approach), 4A1034G (Monitoring of Central Nervous Electrical Activity, Intraoperative, Percutaneous Approach) and 4A103BD (Monitoring of Intracranial Pressure, Percutaneous Approach). All of these are approximate matches, so review the record to pick the right one.
ICD-10-PCS equivalents
- 4A1004GMonitoring of Central Nervous Electrical Activity, Intraoperative, Open Approachapproximate
- 4A1034GMonitoring of Central Nervous Electrical Activity, Intraoperative, Percutaneous Approachapproximate
- 4A103BDMonitoring of Intracranial Pressure, Percutaneous Approachapproximate
- 4A103KDMonitoring of Intracranial Temperature, Percutaneous Approachapproximate
- 4A103RDMonitoring of Intracranial Saturation, Percutaneous Approachapproximate
- 4A1074GMonitoring of Central Nervous Electrical Activity, Intraoperative, Via Natural or Artificial Openingapproximate
- 4A107BDMonitoring of Intracranial Pressure, Via Natural or Artificial Openingapproximate
- 4A107KDMonitoring of Intracranial Temperature, Via Natural or Artificial Openingapproximate
- 4A107RDMonitoring of Intracranial Saturation, Via Natural or Artificial Openingapproximate
- 4A1084GMonitoring of Central Nervous Electrical Activity, Intraoperative, Via Natural or Artificial Opening Endoscopicapproximate
- 4A108BDMonitoring of Intracranial Pressure, Via Natural or Artificial Opening Endoscopicapproximate
- 4A108KDMonitoring of Intracranial Temperature, Via Natural or Artificial Opening Endoscopicapproximate
- 4A108RDMonitoring of Intracranial Saturation, Via Natural or Artificial Opening Endoscopicapproximate
- 4A10X2ZMonitoring of Central Nervous Conductivity, External Approachapproximate
- 4A10X4GMonitoring of Central Nervous Electrical Activity, Intraoperative, External Approachapproximate
- 4A11029Monitoring of Peripheral Nervous Conductivity, Sensory, Open Approachapproximate
- 4A1102BMonitoring of Peripheral Nervous Conductivity, Motor, Open Approachapproximate
- 4A1104GMonitoring of Peripheral Nervous Electrical Activity, Intraoperative, Open Approachapproximate
- 4A11329Monitoring of Peripheral Nervous Conductivity, Sensory, Percutaneous Approachapproximate
- 4A1132BMonitoring of Peripheral Nervous Conductivity, Motor, Percutaneous Approachapproximate
- 4A1134GMonitoring of Peripheral Nervous Electrical Activity, Intraoperative, Percutaneous Approachapproximate
- 4A11729Monitoring of Peripheral Nervous Conductivity, Sensory, Via Natural or Artificial Openingapproximate
- 4A1172BMonitoring of Peripheral Nervous Conductivity, Motor, Via Natural or Artificial Openingapproximate
- 4A1174GMonitoring of Peripheral Nervous Electrical Activity, Intraoperative, Via Natural or Artificial Openingapproximate
- 4A11829Monitoring of Peripheral Nervous Conductivity, Sensory, Via Natural or Artificial Opening Endoscopicapproximate
- 4A1182BMonitoring of Peripheral Nervous Conductivity, Motor, Via Natural or Artificial Opening Endoscopicapproximate
- 4A1184GMonitoring of Peripheral Nervous Electrical Activity, Intraoperative, Via Natural or Artificial Opening Endoscopicapproximate
- 4A11X29Monitoring of Peripheral Nervous Conductivity, Sensory, External Approachapproximate
- 4A11X2BMonitoring of Peripheral Nervous Conductivity, Motor, External Approachapproximate
- 4A11X4GMonitoring of Peripheral Nervous Electrical Activity, Intraoperative, External Approachapproximate
Common questions about 00.94
What is the ICD-10 code for ICD-9 00.94?
- The GEMs map 00.94 to ICD-10-PCS 4A1004G, 4A1034G, 4A103BD, 4A103KD, 4A103RD, 4A1074G and 24 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.