4A0C45ZMeasurement of Biliary Flow, Percutaneous Endoscopic Approach
- Billable / Specific Code
4A0C45Z is a billable ICD-10-PCS procedure code for Measurement of Biliary Flow, Percutaneous Endoscopic Approach. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to 6 MS-DRGs. The root operation Measurement involves determining the level of a physiological or physical function at a point in time. In AHRQ's Clinical Classifications Software (CCSR), this procedure falls under Measurement and monitoring, NEC.
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 | C | Biliary |
| 5 | Approach | 4 | Percutaneous Endoscopic |
| 6 | Function/Device | 5 | Flow |
| 7 | Qualifier | Z | No Qualifier |
In the ICD-10-PCS Alphabetic Index
These FY 2027 ICD-10-PCS Alphabetic Index entries lead to this code:
To code measurement of the flow biliary, open the FY 2027 ICD-10-PCS Alphabetic Index at Measurement, then the subterms Biliary, Flow. The index leads to table 4A0, where the approach, Function/Device and qualifier values shown in the breakdown above complete the seven-character code 4A0C45Z.
Clinical Classification (CCSR)
AHRQ groups this procedure code into these clinical categories.
Convert to ICD-9-PCS
Closest ICD-9-PCS equivalents for this code under the General Equivalence Mappings.
Similar Procedure Codes
Questions About 4A0C45Z
Is 4A0C45Z a billable code?
Yes. This is a complete seven-character ICD-10-PCS code, specific enough to report Measurement of Biliary Flow, Percutaneous Endoscopic Approach on inpatient claims from October 1, 2026 through September 30, 2027.
What do the characters in 4A0C45Z mean?
The code 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 C is the BodySystem (Biliary); the 5th character 4 is the Approach (Percutaneous Endoscopic); the 6th character 5 is the Function/Device (Flow); the 7th character Z is the Qualifier (No Qualifier).
What MS-DRG does 4A0C45Z group to?
On an inpatient stay, Measurement of Biliary Flow, Percutaneous Endoscopic Approach maps to MS-DRGs 356, 357, 358, 420, 421, 422, with relative weights from 1.4249 to 4.3380. The MS-DRG sets the fixed Medicare payment for the stay.
What is the ICD-9-PCS equivalent of 4A0C45Z?
Under the General Equivalence Mappings, Measurement of Biliary Flow, Percutaneous Endoscopic Approach crosswalks to ICD-9-PCS 51.19 (Other diagnostic procedures on biliary tract). The mapping is approximate, so confirm it fits the documentation.
