Is O99.843 a billable ICD-10-CM code?

Yes. O99.843 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does O99.843 sit in the tabular list?

Pregnancy, childbirth and the puerperium (O00-O9A), in the block Other obstetric conditions, not elsewhere classified (O94-O9A).

O99.843

O99.843 — Bariatric surgery status complicating pregnancy, third trimester

Billable / specific codeICD-10-CM

O99.843 is a billable, specific ICD-10-CM code for bariatric surgery status complicating pregnancy, third trimester. It is valid for submission on a claim.

Excludes2 inherited from the categories above O99.843

Also inherited, and the opposite of Excludes1: these conditions are not part of O99.843, but a patient can have both, so you may code both.

Written on O99.8 — Other specified diseases and conditions complicating pregnancy, childbirth and the puerperium

genitourinary infections in pregnancy (O23.-)
infection of genitourinary tract following delivery (O86.1-O86.4)
malignant neoplasm complicating pregnancy, childbirth and the puerperium (O9A.1-)
maternal care for known or suspected abnormality of maternal pelvic organs (O34.-)
postpartum acute kidney failure (O90.49)
traumatic injuries in pregnancy (O9A.2-)

Written on O99 — Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium

when the reason for maternal care is that the condition is known or suspected to have affected the fetus (O35-O36)

Risk adjustment

O99.843 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

O99.843 is named in 1 Medicare coverage policy — 1 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A57484Billing and Coding: Vitamin D Assay Testing

Code history

O99.843 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share O99.84. If O99.843 is not quite right, the correct code is usually one of these.

Questions about O99.843

Is O99.843 a billable ICD-10-CM code?: Yes. O99.843 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does O99.843 sit in the tabular list?: Pregnancy, childbirth and the puerperium (O00-O9A), in the block Other obstetric conditions, not elsewhere classified (O94-O9A).