4A027FZMeasurement of Cardiac Rhythm, Via Natural or Artificial Opening
- Billable / Specific Code
4A027FZ is a billable ICD-10-PCS procedure code for Measurement of Cardiac Rhythm, Via Natural or Artificial Opening. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRGs 273, 274. The root operation Measurement involves determining the level of a physiological or physical function at a point in time.
Code Identity
PCS Table Breakdown
Each ICD-10-PCS code is built from seven characters, each an axis of the procedure. Hover or tap the icons for the official CMS definitions.
| Position | Designation | Value | Meaning |
|---|---|---|---|
| 1 | Section | 4 | Measurement and Monitoring |
| 2 | Body System | A | Physiological Systems |
| 3 | Operation | 0 | Measurement |
| 4 | BodySystem | 2 | Cardiac |
| 5 | Approach | 7 | Via Natural or Artificial Opening |
| 6 | Function/Device | F | Rhythm |
| 7 | Qualifier | Z | No Qualifier |
Convert to ICD-9-PCS
Closest ICD-9-PCS equivalents for 4A027FZ under the General Equivalence Mappings.
Code History
- 4A023FZ — Measurement of Cardiac Rhythm, Percutaneous Approach
Similar Procedure Codes
Questions About 4A027FZ
Is 4A027FZ a billable code?
Yes. 4A027FZ is a complete seven-character ICD-10-PCS code, specific enough to report Measurement of Cardiac Rhythm, Via Natural or Artificial Opening on inpatient claims from October 1, 2025 through September 30, 2026.
What do the characters in 4A027FZ mean?
4A027FZ breaks down character by character: the 1st character 4 is the Section (Measurement and Monitoring); the 2nd character A is the Body System (Physiological Systems); the 3rd character 0 is the Operation (Measurement); the 4th character 2 is the BodySystem (Cardiac); the 5th character 7 is the Approach (Via Natural or Artificial Opening); the 6th character F is the Function/Device (Rhythm); the 7th character Z is the Qualifier (No Qualifier).
What MS-DRG does 4A027FZ group to?
On an inpatient stay, Measurement of Cardiac Rhythm, Via Natural or Artificial Opening maps to MS-DRGs 273, 274, with relative weights from 3.2917 to 4.1255. The MS-DRG sets the fixed Medicare payment for the stay.
What is the ICD-9-PCS equivalent of 4A027FZ?
Under the General Equivalence Mappings, Measurement of Cardiac Rhythm, Via Natural or Artificial Opening crosswalks to ICD-9-PCS 89.59. The mapping is approximate, so confirm it fits the documentation.
