Skip to main content
ICD-10/O35.09

O35.09 ICD-10-CM Code: Maternal care for (suspected) other central nervous system malformation or damage in fetus

Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.

Official Registry Overview & Definition

Maternal care for (suspected) other central nervous system malformation or damage in fetus is a non-billable ICD-10-CM category code (O35.09). A more specific billable subcode must be selected for claims submission.

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for O35.09 in the official ICD-10-CM tabular list.

Includes

Conditions the official ICD-10-CM tabular list includes under this code.

  • the listed conditions in the fetus as a reason for hospitalization or other obstetric care to the mother, or for termination of pregnancy

Excludes1 — Not Coded Here

Conditions generally not reported together with this code (Excludes1) -- an error unless the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Excludes2 — Not Included Here

Conditions not covered by this code, but which may be reported alongside it when both are present.

Code Also

Additional codes that may be required to fully describe the encounter.

  • any associated maternal condition

Change history

  • FY2023 — 2022-10-01
    Added to the code set
    Maternal care for (suspected) other central nervous system malformation or damage in fetus
    FY2023 changes

Verify Before Coding

  • Not billable as written — a more specific code is required: O35.09X0, O35.09X1, O35.09X2, O35.09X3, O35.09X4.
  • Requires a 7th character. "One of the following 7th characters is to be assigned to each code under category O35. 7th character 0 is for single gestations and multiple gestations where the fetus is unspecified. 7th characters 1 through 9 are for cases of multiple gestations to identify the fetus for which the code applies. The appropriate code from category O30, Multiple gestation, must also be assigned when assigning a code from category O35 that has a 7th character of 1 through 9." Options: O35.09X0, O35.09X1, O35.09X2, O35.09X3, O35.09X4, O35.09X5

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim.

Contextual Map

Every relationship of O35.09 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Hierarchy

  • O00-O9A — Chapter 15: Pregnancy, Childbirth and the Puerperium (O00-O9A) (O00-O9A) [Hierarchy]
  • O30-O48 — Maternal care related to the fetus and amniotic cavity and possible delivery problems [Hierarchy]
  • O35 — Clinical Diagnosis [Hierarchy]
  • O35.0 — Clinical Diagnosis [Hierarchy]

Referenced by Excludes1 notes

  • Z03.7 — Encounter for suspected maternal and fetal conditions ruled out [Excludes1](via O35.-): “known or suspected fetal anomalies affecting management of mother, not ruled out (O26.-, O35.-, O36.-, O40.-, O41.-)” · check together

Referenced by Excludes2 notes

  • O98 — Maternal infectious and parasitic diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium [Excludes2](via O35.-): “when the reason for maternal care is that the disease is known or suspected to have affected the fetus (O35-O36)” · check together
  • O99 — Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium [Excludes2](via O35.-): “when the reason for maternal care is that the condition is known or suspected to have affected the fetus (O35-O36)” · check together

Index entries

  • Pregnancy (single) (uterine), complicated by (care of) (management affected by), fetal (maternal care for), central nervous system malformation or damage, specified type NEC[Index term]
  • Pregnancy (single) (uterine), complicated by (care of) (management affected by), malformation, central nervous system, specified type NEC[Index term]

Nearest codes (40)

  • O35 — Maternal care for known or suspected fetal abnormality and damage [Sibling]
  • O35.06X3 — Maternal care for (suspected) central nervous system malformation or damage in fetus, hydrocephaly, fetus 3 [Sibling]
  • O35.06X4 — Maternal care for (suspected) central nervous system malformation or damage in fetus, hydrocephaly, fetus 4 [Sibling]
  • O35.06X5 — Maternal care for (suspected) central nervous system malformation or damage in fetus, hydrocephaly, fetus 5 [Sibling]
  • O35.06X9 — Maternal care for (suspected) central nervous system malformation or damage in fetus, hydrocephaly, other fetus [Sibling]
  • O35.07 — Maternal care for (suspected) central nervous system malformation or damage in fetus, microcephaly [Sibling]
  • O35.07X0 — Maternal care for (suspected) central nervous system malformation or damage in fetus, microcephaly, not applicable or unspecified [Sibling]
  • O35.07X1 — Maternal care for (suspected) central nervous system malformation or damage in fetus, microcephaly, fetus 1 [Sibling]
  • and 32 more

Change history

  • FY2023 — Added to the code set [Change history]

Referenced by Other Codes

Official ICD-10-CM tabular notes on other codes that name O35.09 or its code family.

1 Excludes1 notes: Z03.7 (via O35.-).

2 Excludes2 notes: O98 (via O35.-), O99 (via O35.-).

Frequently Asked Questions (FAQ) & Clinical Guidance

Can O35.09 be billed directly?

No. O35.09 (Maternal care for (suspected) other central nervous system malformation or damage in fetus) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.

Does O35.09 require a 7th character?

Yes. One of the following 7th characters is to be assigned to each code under category O35. 7th character 0 is for single gestations and multiple gestations where the fetus is unspecified. 7th characters 1 through 9 are for cases of multiple gestations to identify the fetus for which the code applies. The appropriate code from category O30, Multiple gestation, must also be assigned when assigning a code from category O35 that has a 7th character of 1 through 9..

Nearest Codes in This Family

Official ICD-10-CM classifications closest to O35.09 in its code family, with their registry titles.

  • O35.08X2 — Maternal care for (suspected) central nervous system malformation or damage in fetus, spina bifida, fetus 2
  • O35.08X3 — Maternal care for (suspected) central nervous system malformation or damage in fetus, spina bifida, fetus 3
  • O35.08X4 — Maternal care for (suspected) central nervous system malformation or damage in fetus, spina bifida, fetus 4
  • O35.08X5 — Maternal care for (suspected) central nervous system malformation or damage in fetus, spina bifida, fetus 5
  • O35.08X9 — Maternal care for (suspected) central nervous system malformation or damage in fetus, spina bifida, other fetus
  • O35.09X0 — Maternal care for (suspected) other central nervous system malformation or damage in fetus, not applicable or unspecified
  • O35.09X1 — Maternal care for (suspected) other central nervous system malformation or damage in fetus, fetus 1
  • O35.09X2 — Maternal care for (suspected) other central nervous system malformation or damage in fetus, fetus 2
  • O35.09X3 — Maternal care for (suspected) other central nervous system malformation or damage in fetus, fetus 3
  • O35.09X4 — Maternal care for (suspected) other central nervous system malformation or damage in fetus, fetus 4

View all codes in the O35 family

Indexed Clinical Terms (2)

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.

  • Pregnancy (single) (uterine), complicated by (care of) (management affected by), fetal (maternal care for), central nervous system malformation or damage, specified type NEC
  • Pregnancy (single) (uterine), complicated by (care of) (management affected by), malformation, central nervous system, specified type NEC