ICD-10-PCS 4A1 Measurement and Monitoring: Physiological Systems Monitoring
List of ICD-10-PCS codes used to specify 4A1 - Monitoring (determining the level of a physiological or physical function repetitively over a period of time). There are a total of 195 procedure codes in this section.
| ICD-10-PCS | Description | Status |
|---|---|---|
| 4A1 | Measurement and Monitoring, Physiological Systems, Monitoring | Non-Billable Code |
| 4A1002Z | Monitoring of Central Nervous Conductivity, Open Approach | Billable Code |
| 4A1004G | Monitoring of Central Nervous Electrical Activity, Intraoperative, Open Approach | Billable Code |
| 4A1004Z | Monitoring of Central Nervous Electrical Activity, Open Approach | Billable Code |
| 4A100BZ | Monitoring of Central Nervous Pressure, Open Approach | Billable Code |
| 4A1034G | Monitoring of Central Nervous Electrical Activity, Intraoperative, Percutaneous Approach | Billable Code |
| 4A1034Z | Monitoring of Central Nervous Electrical Activity, Percutaneous Approach | Billable Code |
| 4A103BD | Monitoring of Intracranial Pressure, Percutaneous Approach | Billable Code |
| 4A103KD | Monitoring of Intracranial Temperature, Percutaneous Approach | Billable Code |
| 4A103RD | Monitoring of Intracranial Saturation, Percutaneous Approach | Billable Code |
| 4A1074G | Monitoring of Central Nervous Electrical Activity, Intraoperative, Via Natural or Artificial Opening | Billable Code |
| 4A1074Z | Monitoring of Central Nervous Electrical Activity, Via Natural or Artificial Opening | Billable Code |
| 4A107BD | Monitoring of Intracranial Pressure, Via Natural or Artificial Opening | Billable Code |
| 4A107KD | Monitoring of Intracranial Temperature, Via Natural or Artificial Opening | Billable Code |
| 4A107RD | Monitoring of Intracranial Saturation, Via Natural or Artificial Opening | Billable Code |
| 4A1084G | Monitoring of Central Nervous Electrical Activity, Intraoperative, Via Natural or Artificial Opening Endoscopic | Billable Code |
| 4A1084Z | Monitoring of Central Nervous Electrical Activity, Via Natural or Artificial Opening Endoscopic | Billable Code |
| 4A108BD | Monitoring of Intracranial Pressure, Via Natural or Artificial Opening Endoscopic | Billable Code |
| 4A108KD | Monitoring of Intracranial Temperature, Via Natural or Artificial Opening Endoscopic | Billable Code |
| 4A108RD | Monitoring of Intracranial Saturation, Via Natural or Artificial Opening Endoscopic | Billable Code |
| 4A10X2Z | Monitoring of Central Nervous Conductivity, External Approach | Billable Code |
| 4A10X4G | Monitoring of Central Nervous Electrical Activity, Intraoperative, External Approach | Billable Code |
| 4A10X4Z | Monitoring of Central Nervous Electrical Activity, External Approach | Billable Code |
| 4A11029 | Monitoring of Peripheral Nervous Conductivity, Sensory, Open Approach | Billable Code |
| 4A1102B | Monitoring of Peripheral Nervous Conductivity, Motor, Open Approach | Billable Code |
| 4A1104G | Monitoring of Peripheral Nervous Electrical Activity, Intraoperative, Open Approach | Billable Code |
| 4A1104Z | Monitoring of Peripheral Nervous Electrical Activity, Open Approach | Billable Code |
| 4A11329 | Monitoring of Peripheral Nervous Conductivity, Sensory, Percutaneous Approach | Billable Code |
| 4A1132B | Monitoring of Peripheral Nervous Conductivity, Motor, Percutaneous Approach | Billable Code |
| 4A1134G | Monitoring of Peripheral Nervous Electrical Activity, Intraoperative, Percutaneous Approach | Billable Code |
| 4A1134Z | Monitoring of Peripheral Nervous Electrical Activity, Percutaneous Approach | Billable Code |
| 4A11729 | Monitoring of Peripheral Nervous Conductivity, Sensory, Via Natural or Artificial Opening | Billable Code |
| 4A1172B | Monitoring of Peripheral Nervous Conductivity, Motor, Via Natural or Artificial Opening | Billable Code |
| 4A1174G | Monitoring of Peripheral Nervous Electrical Activity, Intraoperative, Via Natural or Artificial Opening | Billable Code |
| 4A1174Z | Monitoring of Peripheral Nervous Electrical Activity, Via Natural or Artificial Opening | Billable Code |
| 4A11829 | Monitoring of Peripheral Nervous Conductivity, Sensory, Via Natural or Artificial Opening Endoscopic | Billable Code |
| 4A1182B | Monitoring of Peripheral Nervous Conductivity, Motor, Via Natural or Artificial Opening Endoscopic | Billable Code |
| 4A1184G | Monitoring of Peripheral Nervous Electrical Activity, Intraoperative, Via Natural or Artificial Opening Endoscopic | Billable Code |
| 4A1184Z | Monitoring of Peripheral Nervous Electrical Activity, Via Natural or Artificial Opening Endoscopic | Billable Code |
| 4A11X29 | Monitoring of Peripheral Nervous Conductivity, Sensory, External Approach | Billable Code |
| 4A11X2B | Monitoring of Peripheral Nervous Conductivity, Motor, External Approach | Billable Code |
| 4A11X4G | Monitoring of Peripheral Nervous Electrical Activity, Intraoperative, External Approach | Billable Code |
| 4A11X4Z | Monitoring of Peripheral Nervous Electrical Activity, External Approach | Billable Code |
| 4A1204Z | Monitoring of Cardiac Electrical Activity, Open Approach | Billable Code |
| 4A1209Z | Monitoring of Cardiac Output, Open Approach | Billable Code |
| 4A120CZ | Monitoring of Cardiac Rate, Open Approach | Billable Code |
| 4A120FZ | Monitoring of Cardiac Rhythm, Open Approach | Billable Code |
| 4A120HZ | Monitoring of Cardiac Sound, Open Approach | Billable Code |
| 4A1234Z | Monitoring of Cardiac Electrical Activity, Percutaneous Approach | Billable Code |
| 4A1239Z | Monitoring of Cardiac Output, Percutaneous Approach | Billable Code |
| 4A123CZ | Monitoring of Cardiac Rate, Percutaneous Approach | Billable Code |
| 4A123FZ | Monitoring of Cardiac Rhythm, Percutaneous Approach | Billable Code |
| 4A123HZ | Monitoring of Cardiac Sound, Percutaneous Approach | Billable Code |
| 4A1274Z | Monitoring of Cardiac Electrical Activity, Via Natural or Artificial Opening | Billable Code |
| 4A1279Z | Monitoring of Cardiac Output, Via Natural or Artificial Opening | Billable Code |
| 4A127CZ | Monitoring of Cardiac Rate, Via Natural or Artificial Opening | Billable Code |
| 4A127FZ | Monitoring of Cardiac Rhythm, Via Natural or Artificial Opening | Billable Code |
| 4A127HZ | Monitoring of Cardiac Sound, Via Natural or Artificial Opening | Billable Code |
| 4A1284Z | Monitoring of Cardiac Electrical Activity, Via Natural or Artificial Opening Endoscopic | Billable Code |
| 4A1289Z | Monitoring of Cardiac Output, Via Natural or Artificial Opening Endoscopic | Billable Code |
| 4A128CZ | Monitoring of Cardiac Rate, Via Natural or Artificial Opening Endoscopic | Billable Code |
| 4A128FZ | Monitoring of Cardiac Rhythm, Via Natural or Artificial Opening Endoscopic | Billable Code |
| 4A128HZ | Monitoring of Cardiac Sound, Via Natural or Artificial Opening Endoscopic | Billable Code |
| 4A12X45 | Monitoring of Cardiac Electrical Activity, Ambulatory, External Approach | Billable Code |
| 4A12X4Z | Monitoring of Cardiac Electrical Activity, External Approach | Billable Code |
| 4A12X9Z | Monitoring of Cardiac Output, External Approach | Billable Code |
| 4A12XCZ | Monitoring of Cardiac Rate, External Approach | Billable Code |
| 4A12XFZ | Monitoring of Cardiac Rhythm, External Approach | Billable Code |
| 4A12XHZ | Monitoring of Cardiac Sound, External Approach | Billable Code |
| 4A12XM4 | Monitoring of Cardiac Stress, External Approach | Billable Code |
| 4A12XSH | Monitoring of Cardiac Vascular Perfusion using Indocyanine Green Dye, External Approach | Billable Code |
| 4A13051 | Monitoring of Arterial Flow, Peripheral, Open Approach | Billable Code |
| 4A13053 | Monitoring of Arterial Flow, Pulmonary, Open Approach | Billable Code |
| 4A1305C | Monitoring of Arterial Flow, Coronary, Open Approach | Billable Code |
| 4A130B1 | Monitoring of Arterial Pressure, Peripheral, Open Approach | Billable Code |
| 4A130B3 | Monitoring of Arterial Pressure, Pulmonary, Open Approach | Billable Code |
| 4A130BC | Monitoring of Arterial Pressure, Coronary, Open Approach | Billable Code |
| 4A130H1 | Monitoring of Arterial Sound, Peripheral, Open Approach | Billable Code |
| 4A130J1 | Monitoring of Arterial Pulse, Peripheral, Open Approach | Billable Code |
| 4A130J3 | Monitoring of Arterial Pulse, Pulmonary, Open Approach | Billable Code |
| 4A130JC | Monitoring of Arterial Pulse, Coronary, Open Approach | Billable Code |
| 4A130R1 | Monitoring of Arterial Saturation, Peripheral, Open Approach | Billable Code |
| 4A13351 | Monitoring of Arterial Flow, Peripheral, Percutaneous Approach | Billable Code |
| 4A13353 | Monitoring of Arterial Flow, Pulmonary, Percutaneous Approach | Billable Code |
| 4A1335C | Monitoring of Arterial Flow, Coronary, Percutaneous Approach | Billable Code |
| 4A133B1 | Monitoring of Arterial Pressure, Peripheral, Percutaneous Approach | Billable Code |
| 4A133B3 | Monitoring of Arterial Pressure, Pulmonary, Percutaneous Approach | Billable Code |
| 4A133BC | Monitoring of Arterial Pressure, Coronary, Percutaneous Approach | Billable Code |
| 4A133H1 | Monitoring of Arterial Sound, Peripheral, Percutaneous Approach | Billable Code |
| 4A133J1 | Monitoring of Arterial Pulse, Peripheral, Percutaneous Approach | Billable Code |
| 4A133J3 | Monitoring of Arterial Pulse, Pulmonary, Percutaneous Approach | Billable Code |
| 4A133JC | Monitoring of Arterial Pulse, Coronary, Percutaneous Approach | Billable Code |
| 4A133R1 | Monitoring of Arterial Saturation, Peripheral, Percutaneous Approach | Billable Code |
| 4A13X51 | Monitoring of Arterial Flow, Peripheral, External Approach | Billable Code |
| 4A13XB1 | Monitoring of Arterial Pressure, Peripheral, External Approach | Billable Code |
| 4A13XH1 | Monitoring of Arterial Sound, Peripheral, External Approach | Billable Code |
| 4A13XJ1 | Monitoring of Arterial Pulse, Peripheral, External Approach | Billable Code |
| 4A13XR1 | Monitoring of Arterial Saturation, Peripheral, External Approach | Billable Code |
| 4A14050 | Monitoring of Venous Flow, Central, Open Approach | Billable Code |
| 4A14051 | Monitoring of Venous Flow, Peripheral, Open Approach | Billable Code |
| 4A14052 | Monitoring of Venous Flow, Portal, Open Approach | Billable Code |
| 4A14053 | Monitoring of Venous Flow, Pulmonary, Open Approach | Billable Code |
| 4A140B0 | Monitoring of Venous Pressure, Central, Open Approach | Billable Code |
| 4A140B1 | Monitoring of Venous Pressure, Peripheral, Open Approach | Billable Code |
| 4A140B2 | Monitoring of Venous Pressure, Portal, Open Approach | Billable Code |
| 4A140B3 | Monitoring of Venous Pressure, Pulmonary, Open Approach | Billable Code |
| 4A140J0 | Monitoring of Venous Pulse, Central, Open Approach | Billable Code |
| 4A140J1 | Monitoring of Venous Pulse, Peripheral, Open Approach | Billable Code |
| 4A140J2 | Monitoring of Venous Pulse, Portal, Open Approach | Billable Code |
| 4A140J3 | Monitoring of Venous Pulse, Pulmonary, Open Approach | Billable Code |
| 4A140R0 | Monitoring of Venous Saturation, Central, Open Approach | Billable Code |
| 4A140R2 | Monitoring of Venous Saturation, Portal, Open Approach | Billable Code |
| 4A140R3 | Monitoring of Venous Saturation, Pulmonary, Open Approach | Billable Code |
| 4A14350 | Monitoring of Venous Flow, Central, Percutaneous Approach | Billable Code |
| 4A14351 | Monitoring of Venous Flow, Peripheral, Percutaneous Approach | Billable Code |
| 4A14352 | Monitoring of Venous Flow, Portal, Percutaneous Approach | Billable Code |
| 4A14353 | Monitoring of Venous Flow, Pulmonary, Percutaneous Approach | Billable Code |
| 4A143B0 | Monitoring of Venous Pressure, Central, Percutaneous Approach | Billable Code |
| 4A143B1 | Monitoring of Venous Pressure, Peripheral, Percutaneous Approach | Billable Code |
| 4A143B2 | Monitoring of Venous Pressure, Portal, Percutaneous Approach | Billable Code |
| 4A143B3 | Monitoring of Venous Pressure, Pulmonary, Percutaneous Approach | Billable Code |
| 4A143J0 | Monitoring of Venous Pulse, Central, Percutaneous Approach | Billable Code |
| 4A143J1 | Monitoring of Venous Pulse, Peripheral, Percutaneous Approach | Billable Code |
| 4A143J2 | Monitoring of Venous Pulse, Portal, Percutaneous Approach | Billable Code |
| 4A143J3 | Monitoring of Venous Pulse, Pulmonary, Percutaneous Approach | Billable Code |
| 4A143R0 | Monitoring of Venous Saturation, Central, Percutaneous Approach | Billable Code |
| 4A143R2 | Monitoring of Venous Saturation, Portal, Percutaneous Approach | Billable Code |
| 4A143R3 | Monitoring of Venous Saturation, Pulmonary, Percutaneous Approach | Billable Code |
| 4A14X51 | Monitoring of Venous Flow, Peripheral, External Approach | Billable Code |
| 4A14XB1 | Monitoring of Venous Pressure, Peripheral, External Approach | Billable Code |
| 4A14XJ1 | Monitoring of Venous Pulse, Peripheral, External Approach | Billable Code |
| 4A1605H | Monitoring of Lymphatic Flow using Indocyanine Green Dye, Open Approach | Billable Code |
| 4A1605Z | Monitoring of Lymphatic Flow, Open Approach | Billable Code |
| 4A160BZ | Monitoring of Lymphatic Pressure, Open Approach | Billable Code |
| 4A1635H | Monitoring of Lymphatic Flow using Indocyanine Green Dye, Percutaneous Approach | Billable Code |
| 4A1635Z | Monitoring of Lymphatic Flow, Percutaneous Approach | Billable Code |
| 4A163BZ | Monitoring of Lymphatic Pressure, Percutaneous Approach | Billable Code |
| 4A1675H | Monitoring of Lymphatic Flow using Indocyanine Green Dye, Via Natural or Artificial Opening | Billable Code |
| 4A1675Z | Monitoring of Lymphatic Flow, Via Natural or Artificial Opening | Billable Code |
| 4A167BZ | Monitoring of Lymphatic Pressure, Via Natural or Artificial Opening | Billable Code |
| 4A1685H | Monitoring of Lymphatic Flow using Indocyanine Green Dye, Via Natural or Artificial Opening Endoscopic | Billable Code |
| 4A1685Z | Monitoring of Lymphatic Flow, Via Natural or Artificial Opening Endoscopic | Billable Code |
| 4A168BZ | Monitoring of Lymphatic Pressure, Via Natural or Artificial Opening Endoscopic | Billable Code |
| 4A1971Z | Monitoring of Respiratory Capacity, Via Natural or Artificial Opening | Billable Code |
| 4A1975Z | Monitoring of Respiratory Flow, Via Natural or Artificial Opening | Billable Code |
| 4A197CZ | Monitoring of Respiratory Rate, Via Natural or Artificial Opening | Billable Code |
| 4A197DZ | Monitoring of Respiratory Resistance, Via Natural or Artificial Opening | Billable Code |
| 4A197LZ | Monitoring of Respiratory Volume, Via Natural or Artificial Opening | Billable Code |
| 4A19X1Z | Monitoring of Respiratory Capacity, External Approach | Billable Code |
| 4A19X5Z | Monitoring of Respiratory Flow, External Approach | Billable Code |
| 4A19XCZ | Monitoring of Respiratory Rate, External Approach | Billable Code |
| 4A19XDZ | Monitoring of Respiratory Resistance, External Approach | Billable Code |
| 4A19XLZ | Monitoring of Respiratory Volume, External Approach | Billable Code |
| 4A1B78Z | Monitoring of Gastrointestinal Motility, Via Natural or Artificial Opening | Billable Code |
| 4A1B7BZ | Monitoring of Gastrointestinal Pressure, Via Natural or Artificial Opening | Billable Code |
| 4A1B7GZ | Monitoring of Gastrointestinal Secretion, Via Natural or Artificial Opening | Billable Code |
| 4A1B88Z | Monitoring of Gastrointestinal Motility, Via Natural or Artificial Opening Endoscopic | Billable Code |
| 4A1B8BZ | Monitoring of Gastrointestinal Pressure, Via Natural or Artificial Opening Endoscopic | Billable Code |
| 4A1B8GZ | Monitoring of Gastrointestinal Secretion, Via Natural or Artificial Opening Endoscopic | Billable Code |
| 4A1BXSH | Monitoring of Gastrointestinal Vascular Perfusion using Indocyanine Green Dye, External Approach | Billable Code |
| 4A1D73Z | Monitoring of Urinary Contractility, Via Natural or Artificial Opening | Billable Code |
| 4A1D75Z | Monitoring of Urinary Flow, Via Natural or Artificial Opening | Billable Code |
| 4A1D7BZ | Monitoring of Urinary Pressure, Via Natural or Artificial Opening | Billable Code |
| 4A1D7DZ | Monitoring of Urinary Resistance, Via Natural or Artificial Opening | Billable Code |
| 4A1D7LZ | Monitoring of Urinary Volume, Via Natural or Artificial Opening | Billable Code |
| 4A1D83Z | Monitoring of Urinary Contractility, Via Natural or Artificial Opening Endoscopic | Billable Code |
| 4A1D85Z | Monitoring of Urinary Flow, Via Natural or Artificial Opening Endoscopic | Billable Code |
| 4A1D8BZ | Monitoring of Urinary Pressure, Via Natural or Artificial Opening Endoscopic | Billable Code |
| 4A1D8DZ | Monitoring of Urinary Resistance, Via Natural or Artificial Opening Endoscopic | Billable Code |
| 4A1D8LZ | Monitoring of Urinary Volume, Via Natural or Artificial Opening Endoscopic | Billable Code |
| 4A1GXSH | Monitoring of Skin and Breast Vascular Perfusion using Indocyanine Green Dye, External Approach | Billable Code |
| 4A1H74Z | Monitoring of Products of Conception, Cardiac Electrical Activity, Via Natural or Artificial Opening | Billable Code |
| 4A1H7CZ | Monitoring of Products of Conception, Cardiac Rate, Via Natural or Artificial Opening | Billable Code |
| 4A1H7FZ | Monitoring of Products of Conception, Cardiac Rhythm, Via Natural or Artificial Opening | Billable Code |
| 4A1H7HZ | Monitoring of Products of Conception, Cardiac Sound, Via Natural or Artificial Opening | Billable Code |
| 4A1H84Z | Monitoring of Products of Conception, Cardiac Electrical Activity, Via Natural or Artificial Opening Endoscopic | Billable Code |
| 4A1H8CZ | Monitoring of Products of Conception, Cardiac Rate, Via Natural or Artificial Opening Endoscopic | Billable Code |
| 4A1H8FZ | Monitoring of Products of Conception, Cardiac Rhythm, Via Natural or Artificial Opening Endoscopic | Billable Code |
| 4A1H8HZ | Monitoring of Products of Conception, Cardiac Sound, Via Natural or Artificial Opening Endoscopic | Billable Code |
| 4A1HX4Z | Monitoring of Products of Conception, Cardiac Electrical Activity, External Approach | Billable Code |
| 4A1HXCZ | Monitoring of Products of Conception, Cardiac Rate, External Approach | Billable Code |
| 4A1HXFZ | Monitoring of Products of Conception, Cardiac Rhythm, External Approach | Billable Code |
| 4A1HXHZ | Monitoring of Products of Conception, Cardiac Sound, External Approach | Billable Code |
| 4A1J72Z | Monitoring of Products of Conception, Nervous Conductivity, Via Natural or Artificial Opening | Billable Code |
| 4A1J74Z | Monitoring of Products of Conception, Nervous Electrical Activity, Via Natural or Artificial Opening | Billable Code |
| 4A1J7BZ | Monitoring of Products of Conception, Nervous Pressure, Via Natural or Artificial Opening | Billable Code |
| 4A1J82Z | Monitoring of Products of Conception, Nervous Conductivity, Via Natural or Artificial Opening Endoscopic | Billable Code |
| 4A1J84Z | Monitoring of Products of Conception, Nervous Electrical Activity, Via Natural or Artificial Opening Endoscopic | Billable Code |
| 4A1J8BZ | Monitoring of Products of Conception, Nervous Pressure, Via Natural or Artificial Opening Endoscopic | Billable Code |
| 4A1JX2Z | Monitoring of Products of Conception, Nervous Conductivity, External Approach | Billable Code |
| 4A1JX4Z | Monitoring of Products of Conception, Nervous Electrical Activity, External Approach | Billable Code |
| 4A1JXBZ | Monitoring of Products of Conception, Nervous Pressure, External Approach | Billable Code |
| 4A1Z7KZ | Monitoring of Temperature, Via Natural or Artificial Opening | Billable Code |
| 4A1ZXKZ | Monitoring of Temperature, External Approach | Billable Code |
| 4A1ZXQZ | Monitoring of Sleep, External Approach | Billable Code |
