4A020FZ ICD-10-PCS Code: Measurement of Cardiac Rhythm, Open Approach
Axis Breakdown
Every ICD-10-PCS code is exactly seven characters, one per axis. Each character's meaning is defined by its position in the code.
| Position | Value | Meaning |
|---|---|---|
| 1 | Section4 | Measurement and Monitoring |
| 2 | Body SystemA | Physiological Systems |
| 3 | Root Operation0 | Measurement Determining the level of a physiological or physical function at a point in time |
| 4 | Body System2 | Cardiac |
| 5 | Approach0 | Open |
| 6 | Function / DeviceF | Rhythm |
| 7 | QualifierZ | No Qualifier |
Related Codes
Same operation — other Approach
Same table and root operation, differing only in the approach character.
4A023FZ — Measurement of Cardiac Rhythm, Percutaneous Approach, 4A027FZ — Measurement of Cardiac Rhythm, Via Natural or Artificial Opening, 4A028FZ — Measurement of Cardiac Rhythm, Via Natural or Artificial Opening Endoscopic, 4A02XFZ — Measurement of Cardiac Rhythm, External Approach
Same operation — other Function / Device
Same table and root operation, differing only in the function / device character.
4A0204Z — Measurement of Cardiac Electrical Activity, Open Approach, 4A0209Z — Measurement of Cardiac Output, Open Approach, 4A020CZ — Measurement of Cardiac Rate, Open Approach, 4A020HZ — Measurement of Cardiac Sound, Open Approach, 4A020PZ — Measurement of Cardiac Action Currents, Open Approach
Contextual Map
Every relationship of 4A020FZ in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.
PCS table
- 4A0[PCS table]— CMS ICD-10-PCS tables
- Measurement and Monitoring — Section: Measurement and Monitoring[Section]: “Measurement and Monitoring”— CMS ICD-10-PCS tables
- Physiological Systems — Body System: Physiological Systems[Body System]: “Physiological Systems”— CMS ICD-10-PCS tables
- Measurement — Operation: Measurement[Operation]: “Measurement”— CMS ICD-10-PCS tables
Clinical classification (CCSR)
- MAM007 — Electrocardiogram (ECG)[CCSR category]: “Electrocardiogram (ECG) — Measurement and Monitoring”— AHRQ CCSR for ICD-10-PCS Procedures (HCUP) · v2026.1
Nearest codes
- 4A0204Z — Measurement of Cardiac Electrical Activity, Open Approach[One axis away]— CMS ICD-10-PCS tables
- 4A0209Z — Measurement of Cardiac Output, Open Approach[One axis away]— CMS ICD-10-PCS tables
- 4A020CZ — Measurement of Cardiac Rate, Open Approach[One axis away]— CMS ICD-10-PCS tables
- 4A020HZ — Measurement of Cardiac Sound, Open Approach[One axis away]— CMS ICD-10-PCS tables
- 4A020PZ — Measurement of Cardiac Action Currents, Open Approach[One axis away]— CMS ICD-10-PCS tables
- 4A023FZ — Measurement of Cardiac Rhythm, Percutaneous Approach[One axis away]— CMS ICD-10-PCS tables
- 4A027FZ — Measurement of Cardiac Rhythm, Via Natural or Artificial Opening[One axis away]— CMS ICD-10-PCS tables
- 4A028FZ — Measurement of Cardiac Rhythm, Via Natural or Artificial Opening Endoscopic[One axis away]— CMS ICD-10-PCS tables
Change history
No changes recorded for this code. This ledger tracks additions, deletions and description changes from FY2026 (April) onward. Note changes are not tracked.
Read from: CMS ICD-10-PCS code tables, index and definitions — FY2026 (April); CMS MS-DRG Definitions Manual (incl. Appendix B diagnosis index, Appendix C CC/MCC list, Appendix E procedure index) and IPPS Final Rule tables — v43; AHRQ HCUP Clinical Classifications Software Refined for ICD-10-PCS Procedures (hcup-us.ahrq.gov/toolssoftware/ccsr/PRCCSR_v2026-1.zip) — v2026.1. All data sources · How to read the labels