< Error codes

Error code

37 — This lab code pays 0 LMS units (since April 1, 1993)

Lab code pays $0

This lab code has a listed benefit of 0 laboratory medicine units, so the line is processed but pays nothing.

What to do: Nothing to do if this is the lab code you meant to bill.

Code
37
Description
This lab code pays 0 LMS units (since April 1, 1993)

Explanation

Updated October 26, 2026

This lab code has a listed benefit of 0 laboratory medicine (LMS) units, so it pays $0. There is nothing to correct.

What it means

Code 37 means the laboratory code billed has a listed benefit of 0 Laboratory Medicine Services (LMS) units, effective April 1, 1993. The line is processed but pays nothing.

Technical laboratory codes are listed in the separate Schedule of Benefits for Laboratory Services, not the physician Schedule.

How to fix it

  1. Check the lab code on the claim. If it is the code you meant to bill, there is nothing to fix.
  2. If you meant to bill a different service, check the correct code. If the claim is on the RA, send a Remittance Advice Inquiry (RAI) through eSubmit, or on form 0918-84, within 7 months of the RA date.

Don't resubmit if

  • The code was billed correctly. It has no payable value.

How APEX handles it

APEX reads your error reports and remittance advice from MCEDT and lists claims rejected with this code in its Correction Centre for you to correct and resubmit. See how APEX works · Pricing

Related codes: 30

Sources