Is O99.810 a billable ICD-10-CM code?

Yes. O99.810 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does O99.810 sit in the tabular list?

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

What cannot be coded together with O99.810?

O99.810 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above O99.810 (O99.81) and apply to it just the same.

O99.810

O99.810 — Abnormal glucose complicating pregnancy

Billable / specific codeICD-10-CM

O99.810 is a billable, specific ICD-10-CM code for abnormal glucose complicating pregnancy. It is valid for submission on a claim.

Excludes1 inherited from the categories above O99.810

These are not written on O99.810, but they bind it: a note on a category applies to every code beneath it. Billing O99.810 with anything listed here is a denial.

Written on O99.81 — Abnormal glucose complicating pregnancy, childbirth and the puerperium

gestational diabetes (O24.4-)

Excludes2 inherited from the categories above O99.810

Also inherited, and the opposite of Excludes1: these conditions are not part of O99.810, 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

O99.810 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

O99.810 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 O99.810 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 O99.810.

Pregnancy›complicated by›abnormal, abnormality›glucose NEC(tolerance)

Code history

O99.810 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 O99.81. If O99.810 is not quite right, the correct code is usually one of these.

Questions about O99.810

Is O99.810 a billable ICD-10-CM code?: Yes. O99.810 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does O99.810 sit in the tabular list?: Pregnancy, childbirth and the puerperium (O00-O9A), in the block Other obstetric conditions, not elsewhere classified (O94-O9A).
What cannot be coded together with O99.810?: O99.810 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above O99.810 (O99.81) and apply to it just the same.