HCPCS Level II · Medical services and quality measures
M1438Time last known well to hospital arrival less than or equal to 3.5 hours (<= 210 minutes)
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Source: CMS HCPCS quarterly update, October 2026. Page updated September 29, 2026.
About M1438
M1438 is an HCPCS Level II code in the M series (medical services and quality measures), describing time last known well to hospital arrival less than or equal to 3.5 hours (<= 210 minutes).
It was added to HCPCS effective 01/01/2026.
Its Medicare coverage code is "C", meaning coverage is left to the Medicare contractor's judgment.
Details
- Short description
- Lst knwn well <=210 min
- Date added
- 01/01/2026
- Action effective
- 01/01/2026
- BETOS
- Z2
Related M14xx codes
- M1400Patients who died during the follow-up period
- M1401Stages i-iii breast cancer
- M1402Patients receiving an initial chemotherapy regimen with a defined duration with the eligible clinician or group
- M1403Patients with baseline and follow-up promis surveys documented in the medical record
- M1404Patients on a therapeutic clinical trial
- M1405Patients with recurrence/disease progression
- M1406Patients who leave the practice during the follow-up period
- M1407Patients who died during the follow-up period
- M1408Patients who have germline brca testing completed before diagnosis of epithelial ovarian, fallopian tube, or primary peritoneal cancer
- M1409Patients who received germline testing for brca1 and brca2 or genetic counseling completed within 6 months of diagnosis
- M1410Patients who did not have germline testing for brca1 and brca2 or genetic counseling completed within 6 months of diagnosis
- M1411Currently on first-line immune checkpoint inhibitors without chemotherapy
Common questions about M1438
Is HCPCS M1438 still valid?
- Yes. M1438 is active in the CMS October 2026 HCPCS file.
Does Medicare cover M1438?
- Its coverage code is "C": coverage is left to the Medicare contractor's judgment. Check the local coverage determination for your region.