C7637ZZNonimaging Nuclear Medicine Assay of Blood using Cobalt 58 (Co-58)
- Billable / Specific Code
C7637ZZ is a billable ICD-10-PCS procedure code for Nonimaging Nuclear Medicine Assay of Blood using Cobalt 58 (Co-58). It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The root operation Nonimaging Nuclear Medicine Assay involves introduction of radioactive materials into the body for the study of body fluids and blood elements, by the detection of radioactive emissions. In AHRQ's Clinical Classifications Software (CCSR), this procedure falls under Radionuclide therapy and non-imaging procedures.
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 | C | Nuclear Medicine |
| 2 | Body System | 7 | Lymphatic and Hematologic System |
| 3 | Type | 6 | Nonimaging Nuclear Medicine Assay |
| 4 | BodyPart | 3 | Blood |
| 5 | Radionuclide | 7 | Cobalt 58 (Co-58) |
| 6 | Qualifier | Z | None |
| 7 | Qualifier | Z | None |
In the ICD-10-PCS Alphabetic Index
These FY 2026 ICD-10-PCS Alphabetic Index entries lead to C7637ZZ:
Clinical Classification (CCSR)
AHRQ groups C7637ZZ into these clinical categories.
Convert to ICD-9-PCS
Closest ICD-9-PCS equivalents for C7637ZZ under the General Equivalence Mappings.
Similar Procedure Codes
Questions About C7637ZZ
Is C7637ZZ a billable code?
Yes. C7637ZZ is a complete seven-character ICD-10-PCS code, specific enough to report Nonimaging Nuclear Medicine Assay of Blood using Cobalt 58 (Co-58) on inpatient claims from October 1, 2025 through September 30, 2026.
What do the characters in C7637ZZ mean?
C7637ZZ breaks down character by character: the 1st character C is the Section (Nuclear Medicine); the 2nd character 7 is the Body System (Lymphatic and Hematologic System); the 3rd character 6 is the Type (Nonimaging Nuclear Medicine Assay); the 4th character 3 is the BodyPart (Blood); the 5th character 7 is the Radionuclide (Cobalt 58 (Co-58)); the 6th character Z is the Qualifier (None); the 7th character Z is the Qualifier (None).
What is the ICD-9-PCS equivalent of C7637ZZ?
Under the General Equivalence Mappings, Nonimaging Nuclear Medicine Assay of Blood using Cobalt 58 (Co-58) crosswalks to ICD-9-PCS 92.05. The mapping is approximate, so confirm it fits the documentation.
