According to the ICD-9-CM Official Guidelines for Coding and Reporting, the principal diagnosis is the condition established after study to be chiefly responsible for the patient's admission. Code V30.00, "Single live born, born in hospital," is assigned as the principal diagnosis for a liveborn infant for the birth admission. The other codes listed are invalid as a principal diagnosis. V codes for outcome of delivery (V27.2) and E codes for external causes of injury (E867) are supplementary classifications and are explicitly prohibited from being used as a principal diagnosis. Morphology codes (M9010/0) are from the International Classification of Diseases for Oncology (ICD-O) and describe tumor histology; they are not valid ICD-9-CM diagnosis codes.

A. V27 codes are for the mother's record only to indicate the outcome of delivery and are never permitted as a principal diagnosis.

C. E codes classify the external causes of injuries and poisonings; they are supplementary and can never be assigned as a principal diagnosis.

D. This is an ICD-O morphology (M) code used by cancer registries to describe cell type; it is not a valid ICD-9-CM diagnosis code.

1. Centers for Disease Control and Prevention (CDC)

National Center for Health Statistics (NCHS). ICD-9-CM Official Guidelines for Coding and Reporting. Effective October 1

2011.

Section I.C.15.a.1 (Newborns): "The appropriate code from category V30

Liveborn infants according to type of birth

is assigned as the principal diagnosis for a normal newborn on the birth record." (Supports correct answer B).

Section I.C.11.a.10 (Outcome of Delivery): "A code from category V27

Outcome of delivery

should be included on every maternal record when a delivery has occurred. These codes are not to be used on the newborn’s record. A code from category V27 is not to be used as a principal diagnosis." (Supports why A is incorrect).

Section I.C.19.a (General E Code Guidelines): "These codes are never to be recorded as a principal diagnosis (first-listed in noninpatient settings)." (Supports why C is incorrect).

2. Sayles

N. B.

& Gordon

L. A. (2016). Health Information Management Technology: An Applied Approach (5th ed.). AHIMA Press.

Chapter 6

Basic Coding Principles: This chapter details the Uniform Hospital Discharge Data Set (UHDDS) definition of a principal diagnosis and the specific rules for supplementary classifications. It explains that E codes and certain V codes cannot be used as the principal diagnosis

while V30 codes are used as the principal diagnosis for newborns.

3. Indiana University

School of Informatics and Computing. HIM-M 330 Medical Terminology Course Materials.

Module on ICD-9-CM Coding: Courseware for this program consistently teaches that E codes are supplemental and cannot be a principal diagnosis

and that V30 is the correct principal diagnosis for a newborn admission

aligning with official NCHS guidelines. (Supports the overall rationale).