265 Certain conditions originating in the perinatal period are reported with codes begin- ning with the letter P in International Classification of Diseases, 10th Revision, Clinical Modification (ICD-10-CM) these codes are found in Chapter 16 of the ICD-10-CM tabular list. Guidelines for reporting conditions found in ICD-10-CM Chapter 16 are similar to those in Chapter 15 of International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM). However, there are a few substantial differences. The Table on page 5 provides a comparison of the guidelines. Chapter 16 of the tabular list for ICD-10-CM includes more helpful instructions for reporting conditions originating in the perinatal period. An inclusion note repeats the instruction from the guidelines. Includes: conditions that have their origin in the fetal or perinatal period (before birth through the first 28 days after birth) even if morbidity occurs later Exclusion notes advise of conditions that are not included in the chapter but may be reported in addition to conditions reported with codes in Chapter 16 when coexisting. Excludes 2: congenital malformations, deformations and chromosomal abnormalities (Q00–Q99) endocrine, nutritional and metabolic diseases (E00–E88) injury, poisoning and certain other consequences of external causes (S00–T88) neoplasms (C00–D49) tetanus neonatorum (A33) Codes for newborns affected by maternal factors and complications of pregnancy, labor, and delivery (P00–P04) are reported for newborns who are suspected of having an abnormal condition resulting from exposure from the mother or the birth process. Note: These codes are for use when the listed maternal conditions are specified as the cause of confirmed morbidity or potential morbidity which have their origin in the perinatal period (before birth through the first 28 days after birth). Codes from these categories are also for use for newborns who are suspected of having an abnormal condition resulting from exposure from the mother or the birth process, but without signs or symptoms, and, which after examination and observation, is found not to exist. These codes may be used even if treatment is begun for a suspected condition that is ruled out [emphasis added]. Appendix B-18 Guidelines for Chapter 16 (continued on page 266)
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