4A19X5Z ICD-10-PCS Code: Monitoring of Respiratory Flow, External 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 Operation1 | Monitoring Determining the level of a physiological or physical function repetitively over a period of time |
| 4 | Body System9 | Respiratory |
| 5 | ApproachX | External |
| 6 | Function / Device5 | Flow |
| 7 | QualifierZ | No Qualifier |
Related Codes
Same operation — other Approach
Same table and root operation, differing only in the approach character.
4A1975Z — Monitoring of Respiratory Flow, Via Natural or Artificial Opening
Same operation — other Function / Device
Same table and root operation, differing only in the function / device character.
4A19X1Z — Monitoring of Respiratory Capacity, External Approach, 4A19XCZ — Monitoring of Respiratory Rate, External Approach, 4A19XDZ — Monitoring of Respiratory Resistance, External Approach, 4A19XLZ — Monitoring of Respiratory Volume, External Approach
Same procedure category (CCSR), other tables
AHRQ's Clinical Classifications Software Refined groups these ICD-10-PCS procedures with this one under Pulmonary function tests (Measurement and Monitoring); listed here are the members in other PCS tables. Source: Clinical Classifications Software Refined (CCSR), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, November 2025.
4A0971Z — Measurement of Respiratory Capacity, Via Natural or Artificial Opening, 4A0975Z — Measurement of Respiratory Flow, Via Natural or Artificial Opening, 4A097CZ — Measurement of Respiratory Rate, Via Natural or Artificial Opening, 4A097DZ — Measurement of Respiratory Resistance, Via Natural or Artificial Opening, 4A097LZ — Measurement of Respiratory Volume, Via Natural or Artificial Opening, 4A097MZ — Measurement of Respiratory Total Activity, Via Natural or Artificial Opening, 4A0981Z — Measurement of Respiratory Capacity, Via Natural or Artificial Opening Endoscopic, 4A0985Z — Measurement of Respiratory Flow, Via Natural or Artificial Opening Endoscopic, 4A098CZ — Measurement of Respiratory Rate, Via Natural or Artificial Opening Endoscopic, 4A098DZ — Measurement of Respiratory Resistance, Via Natural or Artificial Opening Endoscopic, 4A098LZ — Measurement of Respiratory Volume, Via Natural or Artificial Opening Endoscopic, 4A098MZ — Measurement of Respiratory Total Activity, Via Natural or Artificial Opening Endoscopic, 4A09X1Z — Measurement of Respiratory Capacity, External Approach, 4A09X5Z — Measurement of Respiratory Flow, External Approach, 4A09XCZ — Measurement of Respiratory Rate, External Approach, 4A09XDZ — Measurement of Respiratory Resistance, External Approach, 4A09XLZ — Measurement of Respiratory Volume, External Approach, 4A09XMZ — Measurement of Respiratory Total Activity, External Approach, 4B09XSZ — Measurement of Respiratory Pacemaker, External Approach
Contextual Map
Every relationship of 4A19X5Z 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
- 4A1[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
- Monitoring — Operation: Monitoring[Operation]: “Monitoring”— CMS ICD-10-PCS tables
Clinical classification (CCSR)
- MAM014 — Pulmonary function tests[CCSR category]: “Pulmonary function tests — Measurement and Monitoring”— AHRQ CCSR for ICD-10-PCS Procedures (HCUP) · v2026.1
Nearest codes
- 4A1975Z — Monitoring of Respiratory Flow, Via Natural or Artificial Opening[One axis away]— CMS ICD-10-PCS tables
- 4A19X1Z — Monitoring of Respiratory Capacity, External Approach[One axis away]— CMS ICD-10-PCS tables
- 4A19XCZ — Monitoring of Respiratory Rate, External Approach[One axis away]— CMS ICD-10-PCS tables
- 4A19XDZ — Monitoring of Respiratory Resistance, External Approach[One axis away]— CMS ICD-10-PCS tables
- 4A19XLZ — Monitoring of Respiratory Volume, External Approach[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