Imaging (B) ICD-10-PCS
Section B covers imaging procedures with 3,075 ICD-10-PCS codes across 23 body systems, 2,978 of them billable in fiscal year 2026. Each body system below lists its root operations and code ranges.
Body Systems in This Section 23 body systems · 3,075 codes
| Chars 1–2 | Body System | Codes | Billable |
|---|---|---|---|
| B0 | Central Nervous System | 62 | 57 |
| B2 | Heart | 142 | 137 |
| B3 | Upper Arteries | 395 | 390 |
| B4 | Lower Arteries | 253 | 248 |
| B5 | Veins | 513 | 508 |
| B7 | Lymphatic System | 31 | 30 |
| B8 | Eye | 51 | 47 |
| B9 | Ear, Nose, Mouth and Throat | 108 | 104 |
| BB | Respiratory System | 59 | 54 |
| BD | Gastrointestinal System | 32 | 29 |
| BF | Hepatobiliary System and Pancreas | 109 | 103 |
| BG | Endocrine System | 38 | 35 |
| BH | Skin, Subcutaneous Tissue and Breast | 54 | 51 |
| BL | Connective Tissue | 18 | 16 |
| BN | Skull and Facial Bones | 67 | 63 |
| BP | Non-Axial Upper Bones | 280 | 275 |
| BQ | Non-Axial Lower Bones | 249 | 244 |
| BR | Axial Skeleton, Except Skull and Facial Bones | 162 | 157 |
| BT | Urinary System | 161 | 156 |
| BU | Female Reproductive System | 83 | 79 |
| BV | Male Reproductive System | 62 | 57 |
| BW | Anatomical Regions | 115 | 109 |
| BY | Fetus and Obstetrical | 31 | 29 |
The info icon previews what each row contains.
About Section B
The seven characters in the imaging section have the following meaning:
- Character 1 = Section
- Character 2 = Body System
- Character 3 = Root Type
- Character 4 = Body Part
- Character 5 = Contrast
- Character 6 = Qualifier
- Character 7 = Qualifier
Imaging procedure codes have a first character value of "B". Imaging section codes represent procedures including plain radiography, fluoroscopy, CT, MRI, and ultrasound. Nuclear medicine procedure codes, including PET, uptakes, and scans, are in the nuclear medicine section. Therapeutic radiation procedure codes are in a separate radiation oncology section.
In the imaging section, the second character defines the body system and the fourth character defines the body part. The third character defines the root type of imaging procedure (e.g, MRI, ultrasound).
Questions About This Page
How many codes are in the B section?
The B section contains 3,075 ICD-10-PCS codes in FY 2026, organized into 23 body systems. 2,978 of them are billable on inpatient claims.
What does section B cover?
Section B covers imaging procedures. The body systems listed above break it into anatomical groups, and each one links to its root operations and code ranges.
Related References
Source: CMS FY 2026 ICD-10-PCS order file and code tables, effective October 1, 2025 through September 30, 2026.
