| O3505 | Maternal care for (suspected) central nervous system malformation or damage in fetus, holoprosencephaly |
| O3505X0 | Maternal care for (suspected) central nervous system malformation or damage in fetus, holoprosencephaly, not applicable or unspecified |
| O3505X1 | Maternal care for (suspected) central nervous system malformation or damage in fetus, holoprosencephaly, fetus 1 |
| O3505X2 | Maternal care for (suspected) central nervous system malformation or damage in fetus, holoprosencephaly, fetus 2 |
| O3505X3 | Maternal care for (suspected) central nervous system malformation or damage in fetus, holoprosencephaly, fetus 3 |
| O3505X4 | Maternal care for (suspected) central nervous system malformation or damage in fetus, holoprosencephaly, fetus 4 |
| O3505X5 | Maternal care for (suspected) central nervous system malformation or damage in fetus, holoprosencephaly, fetus 5 |
| O3505X9 | Maternal care for (suspected) central nervous system malformation or damage in fetus, holoprosencephaly, other fetus |
| O3506 | Maternal care for (suspected) central nervous system malformation or damage in fetus, hydrocephaly |
| O3506X0 | Mat care (suspected) cnsl malf/damag fts, hydrocephaly, unsp Maternal care for (suspected) central nervous system malformation or damage in fetus, hydrocephaly, not applicable or unspecified |
| O3506X1 | Mat care (suspected) cnsl malf/damag fts, hydroceph, fetus 1 Maternal care for (suspected) central nervous system malformation or damage in fetus, hydrocephaly, fetus 1 |
| O3506X2 | Mat care (suspected) cnsl malf/damag fts, hydroceph, fetus 2 Maternal care for (suspected) central nervous system malformation or damage in fetus, hydrocephaly, fetus 2 |
| O3506X3 | Mat care (suspected) cnsl malf/damag fts, hydroceph, fetus 3 Maternal care for (suspected) central nervous system malformation or damage in fetus, hydrocephaly, fetus 3 |
| O3506X4 | Mat care (suspected) cnsl malf/damag fts, hydroceph, fetus 4 Maternal care for (suspected) central nervous system malformation or damage in fetus, hydrocephaly, fetus 4 |
| O3506X5 | Mat care (suspected) cnsl malf/damag fts, hydroceph, fetus 5 Maternal care for (suspected) central nervous system malformation or damage in fetus, hydrocephaly, fetus 5 |
| O3506X9 | Maternal care for (suspected) central nervous system malformation or damage in fetus, hydrocephaly, other fetus |
| O3507 | Maternal care for (suspected) central nervous system malformation or damage in fetus, microcephaly |
| O3507X0 | Mat care (suspected) cnsl malf/damag fts, microcephaly, unsp Maternal care for (suspected) central nervous system malformation or damage in fetus, microcephaly, not applicable or unspecified |
| O3507X1 | Mat care (suspected) cnsl malf/damag fts, microceph, fetus 1 Maternal care for (suspected) central nervous system malformation or damage in fetus, microcephaly, fetus 1 |
| O3507X2 | Mat care (suspected) cnsl malf/damag fts, microceph, fetus 2 Maternal care for (suspected) central nervous system malformation or damage in fetus, microcephaly, fetus 2 |
| O3507X3 | Mat care (suspected) cnsl malf/damag fts, microceph, fetus 3 Maternal care for (suspected) central nervous system malformation or damage in fetus, microcephaly, fetus 3 |
| O3507X4 | Mat care (suspected) cnsl malf/damag fts, microceph, fetus 4 Maternal care for (suspected) central nervous system malformation or damage in fetus, microcephaly, fetus 4 |
| O3507X5 | Mat care (suspected) cnsl malf/damag fts, microceph, fetus 5 Maternal care for (suspected) central nervous system malformation or damage in fetus, microcephaly, fetus 5 |
| O3507X9 | Maternal care for (suspected) central nervous system malformation or damage in fetus, microcephaly, other fetus |
| O3508 | Maternal care for (suspected) central nervous system malformation or damage in fetus, spina bifida |
| O3508X0 | Mat care (suspected) cnsl malf/damag fts, spina bifida, unsp Maternal care for (suspected) central nervous system malformation or damage in fetus, spina bifida, not applicable or unspecified |
| O3508X1 | Maternal care for (suspected) central nervous system malformation or damage in fetus, spina bifida, fetus 1 |
| O3508X2 | Maternal care for (suspected) central nervous system malformation or damage in fetus, spina bifida, fetus 2 |
| O3508X3 | Maternal care for (suspected) central nervous system malformation or damage in fetus, spina bifida, fetus 3 |
| O3508X4 | Maternal care for (suspected) central nervous system malformation or damage in fetus, spina bifida, fetus 4 |
| O3508X5 | Maternal care for (suspected) central nervous system malformation or damage in fetus, spina bifida, fetus 5 |
| O3508X9 | Maternal care for (suspected) central nervous system malformation or damage in fetus, spina bifida, other fetus |
| O3509 | Maternal care for (suspected) other central nervous system malformation or damage in fetus |
| O3509X0 | Maternal care for (suspected) other central nervous system malformation or damage in fetus, not applicable or unspecified |
| O3509X1 | Maternal care for (suspected) other central nervous system malformation or damage in fetus, fetus 1 |
| O3509X2 | Maternal care for (suspected) other central nervous system malformation or damage in fetus, fetus 2 |
| O3509X3 | Maternal care for (suspected) other central nervous system malformation or damage in fetus, fetus 3 |
| O3509X4 | Maternal care for (suspected) other central nervous system malformation or damage in fetus, fetus 4 |
| O3509X5 | Maternal care for (suspected) other central nervous system malformation or damage in fetus, fetus 5 |
| O3509X9 | Maternal care for (suspected) other central nervous system malformation or damage in fetus, other fetus |
| O351 | Maternal care for (suspected) chromosomal abnormality in fetus |
| O3510 | Maternal care for (suspected) chromosomal abnormality in fetus, unspecified |
| O3510X0 | Mat care chromosomal abnormality in fetus, unspecified, unsp Maternal care for (suspected) chromosomal abnormality in fetus, unspecified, not applicable or unspecified |
| O3510X1 | Maternal care for (suspected) chromosomal abnormality in fetus, unspecified, fetus 1 |
| O3510X2 | Maternal care for (suspected) chromosomal abnormality in fetus, unspecified, fetus 2 |
| O3510X3 | Maternal care for (suspected) chromosomal abnormality in fetus, unspecified, fetus 3 |
| O3510X4 | Maternal care for (suspected) chromosomal abnormality in fetus, unspecified, fetus 4 |
| O3510X5 | Maternal care for (suspected) chromosomal abnormality in fetus, unspecified, fetus 5 |
| O3510X9 | Maternal care for (suspected) chromosomal abnormality in fetus, unspecified, other fetus |
| O3511 | Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 13 |