ICD-10-PCS Table `4A1`
for Physiological Systems, Monitoring

The ICD-10-PCS table below specifies all the valid combinations of the remaining characters beyond the first 3 characters (4A1) in the Measurement and Monitoring section, Physiological Systems body system, and Monitoring root operation. Each row in the table specifies the valid combination of values for characters 4-7. The table contain only those combinations of values that result in a valid procedure code.

4 Measurement and Monitoring
A Physiological Systems
1 Monitoring: Determining the level of a physiological or physical function repetitively over a period of time

Body System Arterial Cardiac Central Nervous Gastrointestinal Lymphatic None Peripheral Nervous Products of Conception, Cardiac Products of Conception, Nervous Respiratory Skin and Breast Urinary Venous	5: Approach	6: Function / Device	7: Qualifier
`4A1----` ← Click code for details.
0 - Central Nervous	`0` - Open	`2` - Conductivity `B` - Pressure	`Z` - No Qualifier
0 - Central Nervous	`0` - Open	`4` - Electrical Activity	`G` - Intraoperative `Z` - No Qualifier
0 - Central Nervous	`3` - Percutaneous `7` - Via Natural or Artificial Opening `8` - Via Natural or Artificial Opening Endoscopic	`4` - Electrical Activity	`G` - Intraoperative `Z` - No Qualifier
0 - Central Nervous	`3` - Percutaneous `7` - Via Natural or Artificial Opening `8` - Via Natural or Artificial Opening Endoscopic	`B` - Pressure `K` - Temperature `R` - Saturation	`D` - Intracranial
0 - Central Nervous	`X` - External	`2` - Conductivity	`Z` - No Qualifier
0 - Central Nervous	`X` - External	`4` - Electrical Activity	`G` - Intraoperative `Z` - No Qualifier
1 - Peripheral Nervous	`0` - Open `3` - Percutaneous `7` - Via Natural or Artificial Opening `8` - Via Natural or Artificial Opening Endoscopic `X` - External	`2` - Conductivity	`9` - Sensory `B` - Motor
1 - Peripheral Nervous	`0` - Open `3` - Percutaneous `7` - Via Natural or Artificial Opening `8` - Via Natural or Artificial Opening Endoscopic `X` - External	`4` - Electrical Activity	`G` - Intraoperative `Z` - No Qualifier
2 - Cardiac	`0` - Open `3` - Percutaneous `7` - Via Natural or Artificial Opening `8` - Via Natural or Artificial Opening Endoscopic	`4` - Electrical Activity `9` - Output `C` - Rate `F` - Rhythm `H` - Sound	`Z` - No Qualifier
2 - Cardiac	`X` - External	`4` - Electrical Activity	`5` - Ambulatory `Z` - No Qualifier
2 - Cardiac	`X` - External	`9` - Output `C` - Rate `F` - Rhythm `H` - Sound	`Z` - No Qualifier
2 - Cardiac	`X` - External	`M` - Total Activity	`4` - Stress
2 - Cardiac	`X` - External	`S` - Vascular Perfusion	`H` - Indocyanine Green Dye
3 - Arterial	`0` - Open `3` - Percutaneous	`5` - Flow `B` - Pressure `J` - Pulse	`1` - Peripheral `3` - Pulmonary `C` - Coronary
3 - Arterial	`0` - Open `3` - Percutaneous	`H` - Sound `R` - Saturation	`1` - Peripheral
3 - Arterial	`X` - External	`5` - Flow `B` - Pressure `H` - Sound `J` - Pulse `R` - Saturation	`1` - Peripheral
4 - Venous	`0` - Open `3` - Percutaneous	`5` - Flow `B` - Pressure `J` - Pulse	`0` - Central `1` - Peripheral `2` - Portal `3` - Pulmonary
4 - Venous	`0` - Open `3` - Percutaneous	`R` - Saturation	`0` - Central `2` - Portal `3` - Pulmonary
4 - Venous	`X` - External	`5` - Flow `B` - Pressure `J` - Pulse	`1` - Peripheral
6 - Lymphatic	`0` - Open `3` - Percutaneous `7` - Via Natural or Artificial Opening `8` - Via Natural or Artificial Opening Endoscopic	`5` - Flow	`H` - Indocyanine Green Dye `Z` - No Qualifier
6 - Lymphatic	`0` - Open `3` - Percutaneous `7` - Via Natural or Artificial Opening `8` - Via Natural or Artificial Opening Endoscopic	`B` - Pressure	`Z` - No Qualifier
9 - Respiratory	`7` - Via Natural or Artificial Opening `X` - External	`1` - Capacity `5` - Flow `C` - Rate `D` - Resistance `L` - Volume	`Z` - No Qualifier
B - Gastrointestinal	`7` - Via Natural or Artificial Opening `8` - Via Natural or Artificial Opening Endoscopic	`8` - Motility `B` - Pressure `G` - Secretion	`Z` - No Qualifier
B - Gastrointestinal	`X` - External	`S` - Vascular Perfusion	`H` - Indocyanine Green Dye
D - Urinary	`7` - Via Natural or Artificial Opening `8` - Via Natural or Artificial Opening Endoscopic	`3` - Contractility `5` - Flow `B` - Pressure `D` - Resistance `L` - Volume	`Z` - No Qualifier
G - Skin and Breast	`X` - External	`S` - Vascular Perfusion	`H` - Indocyanine Green Dye
H - Products of Conception, Cardiac	`7` - Via Natural or Artificial Opening `8` - Via Natural or Artificial Opening Endoscopic `X` - External	`4` - Electrical Activity `C` - Rate `F` - Rhythm `H` - Sound	`Z` - No Qualifier
J - Products of Conception, Nervous	`7` - Via Natural or Artificial Opening `8` - Via Natural or Artificial Opening Endoscopic `X` - External	`2` - Conductivity `4` - Electrical Activity `B` - Pressure	`Z` - No Qualifier
Z - None	`7` - Via Natural or Artificial Opening	`K` - Temperature	`Z` - No Qualifier
Z - None	`X` - External	`K` - Temperature `Q` - Sleep	`Z` - No Qualifier

ICD-10-PCS Table 4A1 for Physiological Systems, Monitoring

ICD-10-PCS Table `4A1`
for Physiological Systems, Monitoring