ICD-10-CM 2026 · Chapter R00-R99

Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified

14 sections · 867 total codes · 678 billable

14
Code Sections
867
Total Codes
678
Billable
12
Most-Searched

About Chapter R00-R99

ICD-10-CM Chapter R00-R99 covers symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified. The chapter contains 14 sections (code blocks) and 867 total codes - 678 are billable on a claim, the rest are non-billable headers used to organize the hierarchy.

Browse below by section, or jump straight to the most-billed codes in this chapter. Every code page includes Type 1/2 Excludes, Inclusion Terms, ICD-9 GEMs crosswalk, HCC mapping, LCD coverage, and payer-specific policies.

Most-Searched Diagnoses in This Chapter

Codes with the most LCD coverage, payer policies, and CPT linkages, proxies for what billers look up most.

R06.02 Shortness of breath
1,369 refs
R10.13 Epigastric pain
1,072 refs
R10.33 Periumbilical pain
1,065 refs
R06.2 Wheezing
1,016 refs
R10.11 Right upper quadrant pain
1,006 refs
R10.12 Left upper quadrant pain
1,004 refs
R10.21 Pelvic and perineal pain right side
943 refs
R10.22 Pelvic and perineal pain left side
943 refs
R10.23 Pelvic and perineal pain bilateral
943 refs
R10.31 Right lower quadrant pain
925 refs
R10.32 Left lower quadrant pain
924 refs
R41.82 Altered mental status, unspecified
897 refs

All Sections in R00-R99

Each section is a code block (e.g. E08-E13 = Diabetes mellitus). Click a section to see all codes inside.

R00-R09 Symptoms and signs involving the circulatory and respiratory systems
73 codes · 58 billable
R10-R19 Symptoms and signs involving the digestive system and abdomen
120 codes · 99 billable
R20-R23 Symptoms and signs involving the skin and subcutaneous tissue
31 codes · 26 billable
R25-R29 Symptoms and signs involving the nervous and musculoskeletal systems
87 codes · 72 billable
R30-R39 Symptoms and signs involving the genitourinary system
54 codes · 42 billable
R40-R46 Symptoms and signs involving cognition, perception, emotional state and behavior
97 codes · 62 billable
R47-R49 Symptoms and signs involving speech and voice
25 codes · 19 billable
R50-R69 General symptoms and signs
88 codes · 68 billable
R70-R79 Abnormal findings on examination of blood, without diagnosis
59 codes · 44 billable
R80-R82 Abnormal findings on examination of urine, without diagnosis
31 codes · 25 billable
R83-R89 Abnormal findings on examination of other body fluids, substances and tissues, without diagnosis
109 codes · 93 billable
R90-R94 Abnormal findings on diagnostic imaging and in function studies, without diagnosis
85 codes · 64 billable
R97 Abnormal tumor markers
7 codes · 5 billable
R99 Ill-defined and unknown cause of mortality
1 codes · 1 billable
← Previous Chapter
Q00-QA0
Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders
Next Chapter →
S00-T88
Injury, poisoning and certain other consequences of external causes

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Reviewed by the PayerReady Medical Coding Team

Verified against the CMS 2026 code set on May 31, 2026.

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