HCPCS

HCPCS Code M1438: Time last known well to hospital arrival less than or equal to 3.5 hours (<=

M1438 is a HCPCS code used to identify a healthcare procedure, service, or supply related to Time last known well to hospital arrival less than or equal to 3.5 hours (<=. You may see this code on claims, billing records, explanations of benefits, preauthorization paperwork, or procedure documentation. HCPCS codes are used to standardize how healthcare services, supplies, equipment, transportation, and certain procedures are documented and billed. Coverage indicator: C.

Reviewed by HealthAssure Clinical TeamUpdated 22 May 2026

What is this code?

HCPCS codes are used to standardize how healthcare services, supplies, equipment, transportation, and certain procedures are documented and billed. Coverage indicator: C.

When is it used?

  • Used in procedure coding, claims, and care documentation.
  • Coverage code: C
  • Pricing indicator: 00

What it does not mean

  • The presence of a procedure code does not by itself explain why a service was needed or whether it was appropriate in a specific case.

Where you may see this code

You may see this code on claims, billing records, explanations of benefits, preauthorization paperwork, or procedure documentation.

Frequently asked questions

Code details

CodeM1438
SystemHCPCS
Display nameTime last known well to hospital arrival less than or equal to 3.5 hours (<=
DescriptionLst knwn well <=210 min

Flags

BillableNo
Valid clinical useNo

Source

SourceHCPCS
Version2026.07
Releasejul-2026

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from HCPCS. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.