Is O99.891 a billable ICD-10-CM code?

Yes. O99.891 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does O99.891 sit in the tabular list?

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

O99.891

O99.891 — Other specified diseases and conditions complicating pregnancy

Billable / specific codeICD-10-CM

O99.891 is a billable, specific ICD-10-CM code for other specified diseases and conditions complicating pregnancy. It is valid for submission on a claim.

Excludes2 inherited from the categories above O99.891

Also inherited, and the opposite of Excludes1: these conditions are not part of O99.891, 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

O99.891 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

O99.891 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.

A56686Billing and Coding: HbA1c

How O99.891 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to O99.891.

Pregnancy›complicated by›connective system disorders(conditions in M00-M99)
Pregnancy›complicated by›musculoskeletal condition(conditions is M00-M99)
Pregnancy›complicated by›pelvic inflammatory disease
Pregnancy›complicated by›peritoneal adhesions(pelvic)
Pregnancy›complicated by›diseases of›specified NEC
Pregnancy›complicated by›disorders of›ear and mastoid process(conditions in H60-H95)
Pregnancy›complicated by›disorders of›eye and adnexa(conditions in H00-H59)
Pregnancy›complicated by›disorders of›specified NEC

Code history

O99.891 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 O99.89. If O99.891 is not quite right, the correct code is usually one of these.

Questions about O99.891

Is O99.891 a billable ICD-10-CM code?: Yes. O99.891 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does O99.891 sit in the tabular list?: Pregnancy, childbirth and the puerperium (O00-O9A), in the block Other obstetric conditions, not elsewhere classified (O94-O9A).