regex101: LOINC Medical Codes (from LOINC.org)

Explanation

Pro

^start of line

Character Class[a-zA-Z0-9]{3,8}

{3,8}matches between 3 and 8 characters from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{1}a digit, repeated exactly 1 time

$end of line

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Quick Reference

25 tokens

Regular Expression

^[a-zA-Z0-9]{3,8}-\d{1}$

# Genuine values
63638-1
8867-4
55231-5
26464-8
22577-1
# Checking edge cases
12-1
123-1
12345678-9
123456789-9
12345678
12345678-
12345678--
12345678-A
12345678-?
12345678-12
# Adding letters to the main code
LL2435-7
LL358-3

Extraction

# Genuine values
63638-1
8867-4
55231-5
26464-8
22577-1
# Checking edge cases
12-1
123-1
12345678-9
123456789-9
12345678
12345678-
12345678--
12345678-A
12345678-?
12345678-12
# Adding letters to the main code
LL2435-7
LL358-3