ICD-10-PCS 4A1 Measurement and Monitoring: Physiological Systems Monitoring
The ICD-10-PCS root operation Monitoring (code 4A1) involves measuring and observing physiological systems to assess function or health status. Classified under the Measurement and Monitoring section, it captures a variety of procedures aimed at tracking vital parameters without performing treatment or alteration.
Monitoring is applied to numerous body systems including the central and peripheral nervous systems, cardiovascular system, respiratory system, lymphatic system, gastrointestinal tract, urinary system, and products of conception. The data encompasses measurements like electrical activity, conductivity, flow, pressure, pulse, saturation, rate, rhythm, and temperature. For instance, codes such as 4A1004Z represent monitoring of central nervous electrical activity via an Open Approach, while 4A1239Z codes for percutaneous monitoring of cardiac output. Approaches vary widely from Open, Percutaneous, Natural or Artificial Opening, endoscopic, to External Approach. This range of monitoring codes enables precise documentation of physiological assessments critical for clinical decision-making and patient care.
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.
4A1 - Measurement and Monitoring, Physiological Systems, Monitoring
4A1002Z - Monitoring of Central Nervous Conductivity, Open Approach
4A1004G - Monitoring of Central Nervous Electrical Activity, Intraoperative, Open Approach
4A1004Z - Monitoring of Central Nervous Electrical Activity, Open Approach
4A100BZ - Monitoring of Central Nervous Pressure, Open Approach
4A1034G - Monitoring of Central Nervous Electrical Activity, Intraoperative, Percutaneous Approach
4A1034Z - Monitoring of Central Nervous Electrical Activity, Percutaneous Approach
4A103BD - Monitoring of Intracranial Pressure, Percutaneous Approach
4A103KD - Monitoring of Intracranial Temperature, Percutaneous Approach
4A103RD - Monitoring of Intracranial Saturation, Percutaneous Approach
4A1074G - Monitoring of Central Nervous Electrical Activity, Intraoperative, Via Natural or Artificial Opening
4A1074Z - Monitoring of Central Nervous Electrical Activity, Via Natural or Artificial Opening
4A107BD - Monitoring of Intracranial Pressure, Via Natural or Artificial Opening
4A107KD - Monitoring of Intracranial Temperature, Via Natural or Artificial Opening
4A107RD - Monitoring of Intracranial Saturation, Via Natural or Artificial Opening
4A1084G - Monitoring of Central Nervous Electrical Activity, Intraoperative, Via Natural or Artificial Opening Endoscopic
4A1084Z - Monitoring of Central Nervous Electrical Activity, Via Natural or Artificial Opening Endoscopic
4A108BD - Monitoring of Intracranial Pressure, Via Natural or Artificial Opening Endoscopic
4A108KD - Monitoring of Intracranial Temperature, Via Natural or Artificial Opening Endoscopic
4A108RD - Monitoring of Intracranial Saturation, Via Natural or Artificial Opening Endoscopic
4A10X2Z - Monitoring of Central Nervous Conductivity, External Approach
4A10X4G - Monitoring of Central Nervous Electrical Activity, Intraoperative, External Approach
4A10X4Z - Monitoring of Central Nervous Electrical Activity, External Approach
4A11029 - Monitoring of Peripheral Nervous Conductivity, Sensory, Open Approach
4A1102B - Monitoring of Peripheral Nervous Conductivity, Motor, Open Approach
4A1104G - Monitoring of Peripheral Nervous Electrical Activity, Intraoperative, Open Approach
4A1104Z - Monitoring of Peripheral Nervous Electrical Activity, Open Approach
4A11329 - Monitoring of Peripheral Nervous Conductivity, Sensory, Percutaneous Approach
4A1132B - Monitoring of Peripheral Nervous Conductivity, Motor, Percutaneous Approach
4A1134G - Monitoring of Peripheral Nervous Electrical Activity, Intraoperative, Percutaneous Approach
4A1134Z - Monitoring of Peripheral Nervous Electrical Activity, Percutaneous Approach
4A11729 - Monitoring of Peripheral Nervous Conductivity, Sensory, Via Natural or Artificial Opening
4A1172B - Monitoring of Peripheral Nervous Conductivity, Motor, Via Natural or Artificial Opening
4A1174G - Monitoring of Peripheral Nervous Electrical Activity, Intraoperative, Via Natural or Artificial Opening
4A1174Z - Monitoring of Peripheral Nervous Electrical Activity, Via Natural or Artificial Opening
4A11829 - Monitoring of Peripheral Nervous Conductivity, Sensory, Via Natural or Artificial Opening Endoscopic
4A1182B - Monitoring of Peripheral Nervous Conductivity, Motor, Via Natural or Artificial Opening Endoscopic
4A1184G - Monitoring of Peripheral Nervous Electrical Activity, Intraoperative, Via Natural or Artificial Opening Endoscopic
4A1184Z - Monitoring of Peripheral Nervous Electrical Activity, Via Natural or Artificial Opening Endoscopic
4A11X29 - Monitoring of Peripheral Nervous Conductivity, Sensory, External Approach
4A11X2B - Monitoring of Peripheral Nervous Conductivity, Motor, External Approach
4A11X4G - Monitoring of Peripheral Nervous Electrical Activity, Intraoperative, External Approach
4A11X4Z - Monitoring of Peripheral Nervous Electrical Activity, External Approach
4A1204Z - Monitoring of Cardiac Electrical Activity, Open Approach
4A1209Z - Monitoring of Cardiac Output, Open Approach
4A120CZ - Monitoring of Cardiac Rate, Open Approach
4A120FZ - Monitoring of Cardiac Rhythm, Open Approach
4A120HZ - Monitoring of Cardiac Sound, Open Approach
4A1234Z - Monitoring of Cardiac Electrical Activity, Percutaneous Approach
4A1239Z - Monitoring of Cardiac Output, Percutaneous Approach
4A123CZ - Monitoring of Cardiac Rate, Percutaneous Approach
4A123FZ - Monitoring of Cardiac Rhythm, Percutaneous Approach
4A123HZ - Monitoring of Cardiac Sound, Percutaneous Approach
4A1274Z - Monitoring of Cardiac Electrical Activity, Via Natural or Artificial Opening
4A1279Z - Monitoring of Cardiac Output, Via Natural or Artificial Opening
4A127CZ - Monitoring of Cardiac Rate, Via Natural or Artificial Opening
4A127FZ - Monitoring of Cardiac Rhythm, Via Natural or Artificial Opening
4A127HZ - Monitoring of Cardiac Sound, Via Natural or Artificial Opening
4A1284Z - Monitoring of Cardiac Electrical Activity, Via Natural or Artificial Opening Endoscopic
4A1289Z - Monitoring of Cardiac Output, Via Natural or Artificial Opening Endoscopic
4A128CZ - Monitoring of Cardiac Rate, Via Natural or Artificial Opening Endoscopic
4A128FZ - Monitoring of Cardiac Rhythm, Via Natural or Artificial Opening Endoscopic
4A128HZ - Monitoring of Cardiac Sound, Via Natural or Artificial Opening Endoscopic
4A12X45 - Monitoring of Cardiac Electrical Activity, Ambulatory, External Approach
4A12X4Z - Monitoring of Cardiac Electrical Activity, External Approach
4A12X9Z - Monitoring of Cardiac Output, External Approach
4A12XCZ - Monitoring of Cardiac Rate, External Approach
4A12XFZ - Monitoring of Cardiac Rhythm, External Approach
4A12XHZ - Monitoring of Cardiac Sound, External Approach
4A12XM4 - Monitoring of Cardiac Stress, External Approach
4A12XSH - Monitoring of Cardiac Vascular Perfusion using Indocyanine Green Dye, External Approach
4A13051 - Monitoring of Arterial Flow, Peripheral, Open Approach
4A13053 - Monitoring of Arterial Flow, Pulmonary, Open Approach
4A1305C - Monitoring of Arterial Flow, Coronary, Open Approach
4A130B1 - Monitoring of Arterial Pressure, Peripheral, Open Approach
4A130B3 - Monitoring of Arterial Pressure, Pulmonary, Open Approach
4A130BC - Monitoring of Arterial Pressure, Coronary, Open Approach
4A130H1 - Monitoring of Arterial Sound, Peripheral, Open Approach
4A130J1 - Monitoring of Arterial Pulse, Peripheral, Open Approach
4A130J3 - Monitoring of Arterial Pulse, Pulmonary, Open Approach
4A130JC - Monitoring of Arterial Pulse, Coronary, Open Approach
4A130R1 - Monitoring of Arterial Saturation, Peripheral, Open Approach
4A13351 - Monitoring of Arterial Flow, Peripheral, Percutaneous Approach
4A13353 - Monitoring of Arterial Flow, Pulmonary, Percutaneous Approach
4A1335C - Monitoring of Arterial Flow, Coronary, Percutaneous Approach
4A133B1 - Monitoring of Arterial Pressure, Peripheral, Percutaneous Approach
4A133B3 - Monitoring of Arterial Pressure, Pulmonary, Percutaneous Approach
4A133BC - Monitoring of Arterial Pressure, Coronary, Percutaneous Approach
4A133H1 - Monitoring of Arterial Sound, Peripheral, Percutaneous Approach
4A133J1 - Monitoring of Arterial Pulse, Peripheral, Percutaneous Approach
4A133J3 - Monitoring of Arterial Pulse, Pulmonary, Percutaneous Approach
4A133JC - Monitoring of Arterial Pulse, Coronary, Percutaneous Approach
4A133R1 - Monitoring of Arterial Saturation, Peripheral, Percutaneous Approach
4A13X51 - Monitoring of Arterial Flow, Peripheral, External Approach
4A13XB1 - Monitoring of Arterial Pressure, Peripheral, External Approach
4A13XH1 - Monitoring of Arterial Sound, Peripheral, External Approach
4A13XJ1 - Monitoring of Arterial Pulse, Peripheral, External Approach
4A13XR1 - Monitoring of Arterial Saturation, Peripheral, External Approach
4A14050 - Monitoring of Venous Flow, Central, Open Approach
4A14051 - Monitoring of Venous Flow, Peripheral, Open Approach
4A14052 - Monitoring of Venous Flow, Portal, Open Approach
4A14053 - Monitoring of Venous Flow, Pulmonary, Open Approach
4A140B0 - Monitoring of Venous Pressure, Central, Open Approach
4A140B1 - Monitoring of Venous Pressure, Peripheral, Open Approach
4A140B2 - Monitoring of Venous Pressure, Portal, Open Approach
4A140B3 - Monitoring of Venous Pressure, Pulmonary, Open Approach
4A140J0 - Monitoring of Venous Pulse, Central, Open Approach
4A140J1 - Monitoring of Venous Pulse, Peripheral, Open Approach
4A140J2 - Monitoring of Venous Pulse, Portal, Open Approach
4A140J3 - Monitoring of Venous Pulse, Pulmonary, Open Approach
4A140R0 - Monitoring of Venous Saturation, Central, Open Approach
4A140R2 - Monitoring of Venous Saturation, Portal, Open Approach
4A140R3 - Monitoring of Venous Saturation, Pulmonary, Open Approach
4A14350 - Monitoring of Venous Flow, Central, Percutaneous Approach
4A14351 - Monitoring of Venous Flow, Peripheral, Percutaneous Approach
4A14352 - Monitoring of Venous Flow, Portal, Percutaneous Approach
4A14353 - Monitoring of Venous Flow, Pulmonary, Percutaneous Approach
4A143B0 - Monitoring of Venous Pressure, Central, Percutaneous Approach
4A143B1 - Monitoring of Venous Pressure, Peripheral, Percutaneous Approach
4A143B2 - Monitoring of Venous Pressure, Portal, Percutaneous Approach
4A143B3 - Monitoring of Venous Pressure, Pulmonary, Percutaneous Approach
4A143J0 - Monitoring of Venous Pulse, Central, Percutaneous Approach
4A143J1 - Monitoring of Venous Pulse, Peripheral, Percutaneous Approach
4A143J2 - Monitoring of Venous Pulse, Portal, Percutaneous Approach
4A143J3 - Monitoring of Venous Pulse, Pulmonary, Percutaneous Approach
4A143R0 - Monitoring of Venous Saturation, Central, Percutaneous Approach
4A143R2 - Monitoring of Venous Saturation, Portal, Percutaneous Approach
4A143R3 - Monitoring of Venous Saturation, Pulmonary, Percutaneous Approach
4A14X51 - Monitoring of Venous Flow, Peripheral, External Approach
4A14XB1 - Monitoring of Venous Pressure, Peripheral, External Approach
4A14XJ1 - Monitoring of Venous Pulse, Peripheral, External Approach
4A1605H - Monitoring of Lymphatic Flow using Indocyanine Green Dye, Open Approach
4A1605Z - Monitoring of Lymphatic Flow, Open Approach
4A160BZ - Monitoring of Lymphatic Pressure, Open Approach
4A1635H - Monitoring of Lymphatic Flow using Indocyanine Green Dye, Percutaneous Approach
4A1635Z - Monitoring of Lymphatic Flow, Percutaneous Approach
4A163BZ - Monitoring of Lymphatic Pressure, Percutaneous Approach
4A1675H - Monitoring of Lymphatic Flow using Indocyanine Green Dye, Via Natural or Artificial Opening
4A1675Z - Monitoring of Lymphatic Flow, Via Natural or Artificial Opening
4A167BZ - Monitoring of Lymphatic Pressure, Via Natural or Artificial Opening
4A1685H - Monitoring of Lymphatic Flow using Indocyanine Green Dye, Via Natural or Artificial Opening Endoscopic
4A1685Z - Monitoring of Lymphatic Flow, Via Natural or Artificial Opening Endoscopic
4A168BZ - Monitoring of Lymphatic Pressure, Via Natural or Artificial Opening Endoscopic
4A1971Z - Monitoring of Respiratory Capacity, Via Natural or Artificial Opening
4A1975Z - Monitoring of Respiratory Flow, Via Natural or Artificial Opening
4A197CZ - Monitoring of Respiratory Rate, Via Natural or Artificial Opening
4A197DZ - Monitoring of Respiratory Resistance, Via Natural or Artificial Opening
4A197LZ - Monitoring of Respiratory Volume, Via Natural or Artificial Opening
4A19X1Z - Monitoring of Respiratory Capacity, External Approach
4A19X5Z - Monitoring of Respiratory Flow, External Approach
4A19XCZ - Monitoring of Respiratory Rate, External Approach
4A19XDZ - Monitoring of Respiratory Resistance, External Approach
4A19XLZ - Monitoring of Respiratory Volume, External Approach
4A1B78Z - Monitoring of Gastrointestinal Motility, Via Natural or Artificial Opening
4A1B7BZ - Monitoring of Gastrointestinal Pressure, Via Natural or Artificial Opening
4A1B7GZ - Monitoring of Gastrointestinal Secretion, Via Natural or Artificial Opening
4A1B88Z - Monitoring of Gastrointestinal Motility, Via Natural or Artificial Opening Endoscopic
4A1B8BZ - Monitoring of Gastrointestinal Pressure, Via Natural or Artificial Opening Endoscopic
4A1B8GZ - Monitoring of Gastrointestinal Secretion, Via Natural or Artificial Opening Endoscopic
4A1BXSH - Monitoring of Gastrointestinal Vascular Perfusion using Indocyanine Green Dye, External Approach
4A1D73Z - Monitoring of Urinary Contractility, Via Natural or Artificial Opening
4A1D75Z - Monitoring of Urinary Flow, Via Natural or Artificial Opening
4A1D7BZ - Monitoring of Urinary Pressure, Via Natural or Artificial Opening
4A1D7DZ - Monitoring of Urinary Resistance, Via Natural or Artificial Opening
4A1D7LZ - Monitoring of Urinary Volume, Via Natural or Artificial Opening
4A1D83Z - Monitoring of Urinary Contractility, Via Natural or Artificial Opening Endoscopic
4A1D85Z - Monitoring of Urinary Flow, Via Natural or Artificial Opening Endoscopic
4A1D8BZ - Monitoring of Urinary Pressure, Via Natural or Artificial Opening Endoscopic
4A1D8DZ - Monitoring of Urinary Resistance, Via Natural or Artificial Opening Endoscopic
4A1D8LZ - Monitoring of Urinary Volume, Via Natural or Artificial Opening Endoscopic
4A1GXSH - Monitoring of Skin and Breast Vascular Perfusion using Indocyanine Green Dye, External Approach
4A1H74Z - Monitoring of Products of Conception, Cardiac Electrical Activity, Via Natural or Artificial Opening
4A1H7CZ - Monitoring of Products of Conception, Cardiac Rate, Via Natural or Artificial Opening
4A1H7FZ - Monitoring of Products of Conception, Cardiac Rhythm, Via Natural or Artificial Opening
4A1H7HZ - Monitoring of Products of Conception, Cardiac Sound, Via Natural or Artificial Opening
4A1H84Z - Monitoring of Products of Conception, Cardiac Electrical Activity, Via Natural or Artificial Opening Endoscopic
4A1H8CZ - Monitoring of Products of Conception, Cardiac Rate, Via Natural or Artificial Opening Endoscopic
4A1H8FZ - Monitoring of Products of Conception, Cardiac Rhythm, Via Natural or Artificial Opening Endoscopic
4A1H8HZ - Monitoring of Products of Conception, Cardiac Sound, Via Natural or Artificial Opening Endoscopic
4A1HX4Z - Monitoring of Products of Conception, Cardiac Electrical Activity, External Approach
4A1HXCZ - Monitoring of Products of Conception, Cardiac Rate, External Approach
4A1HXFZ - Monitoring of Products of Conception, Cardiac Rhythm, External Approach
4A1HXHZ - Monitoring of Products of Conception, Cardiac Sound, External Approach
4A1J72Z - Monitoring of Products of Conception, Nervous Conductivity, Via Natural or Artificial Opening
4A1J74Z - Monitoring of Products of Conception, Nervous Electrical Activity, Via Natural or Artificial Opening
4A1J7BZ - Monitoring of Products of Conception, Nervous Pressure, Via Natural or Artificial Opening
4A1J82Z - Monitoring of Products of Conception, Nervous Conductivity, Via Natural or Artificial Opening Endoscopic
4A1J84Z - Monitoring of Products of Conception, Nervous Electrical Activity, Via Natural or Artificial Opening Endoscopic
4A1J8BZ - Monitoring of Products of Conception, Nervous Pressure, Via Natural or Artificial Opening Endoscopic
4A1JX2Z - Monitoring of Products of Conception, Nervous Conductivity, External Approach
4A1JX4Z - Monitoring of Products of Conception, Nervous Electrical Activity, External Approach
4A1JXBZ - Monitoring of Products of Conception, Nervous Pressure, External Approach
4A1Z7KZ - Monitoring of Temperature, Via Natural or Artificial Opening
4A1ZXKZ - Monitoring of Temperature, External Approach
4A1ZXQZ - Monitoring of Sleep, External Approach
