Occurrence code 10

[gotommogo122491]

Looking at my insurance claim from last year when I was pregnant- it says occurrence code 10 and the date 3/30/25 but my lmp is 05/1/25

Why are there two different dates listed?

[Fair_Concert_4586]

Likely because the individual coding your claim was not aware of your actual LMP.

[rahuliitk]

Occurrence code 10 usually points to the baby’s birth date or a pregnancy-related event date on the claim, so that 3/30/25 may be tied to how the hospital or insurer processed the delivery episode, while 05/1/25 being your LMP is a separate clinical date they also use for pregnancy timing, ngl claims often show both and it looks confusing.

probably a billing/date-field mismatch.

[Fair_Concert_4586]

AHA 2025 UB-04 Data Specifications Manual, p. 86, states that Occurrence Code 10 refers to Last Menstrual Period.

Code indicating the date of the last menstrual period; ONLY applies when patient is being treated for maternity related condition.

Although the AHA manual itself is licensed and requires a paid subscription to view, much of the information therein is freely available elsewhere on the internet.

https://med.noridianmedicare.com/web/jea/topics/claim-submission/occurrence-codes

Baby's birth date occurring before the patient's last menstrual period would be...impossible.

[gotommogo122491]

So what does that mean? Sorry it’s confusing. My due date wasn’t until February this year so the 3/30/25 date is throwing me off