AHIMA Documentation Integrity Practitioner (CDI) CDIP Question # 12 Topic 2 Discussion

The proper sequencing of the principal and secondary diagnoses in this case is as follows:

Principal diagnosis: Acute appendicitis. This is the condition, after study, that occasioned the admission to the hospital, according to the ICD-10-CM Official Guidelines for Coding and Reporting. The patient was admitted for laparoscopic surgery, which is a definitive treatment for acute appendicitis. The physician documented “possible acute appendicitis or probable Meckel diverticulitis” as the cause of the right lower quadrant abdominal pain. According to the AHA’s Coding Clinic, Fourth Quarter 2016, pp. 147-148, when a physician documents two diagnoses connected by “or”, coders should query the physician for clarification if possible. However, if a query is not possible or not answered, coders should assign codes for both conditions, unless one of them has been ruled out or confirmed by further testing or treatment. In this case, there is no indication that either acute appendicitis or Meckel diverticulitis has been ruled out or confirmed by further testing or treatment. Therefore, both conditions should be coded and reported. However, only one of them can be the principal diagnosis. Since acute appendicitis is more commonly associated with laparoscopic surgery than Meckel diverticulitis, and since it has a higher relative weight than Meckel diverticulitis under the MS-DRG system, it is reasonable to select acute appendicitis as the principal diagnosis 23.

Secondary diagnosis: Right lower quadrant abdominal pain. This is a sign or symptom that is associated with the principal diagnosis and requires clinical evaluation, therapeutic treatment, diagnostic procedures, extended length of hospital stay, or increased nursing care and/or monitoring. The patient presented with right lower quadrant abdominal pain as a manifestation of acute appendicitis or Meckel diverticulitis. The pain required clinical evaluation by abdominal ultrasound and therapeutic treatment by laparoscopic surgery. Therefore, it should be coded and reported as a secondary diagnosis 4.

Secondary diagnosis: Type I diabetes mellitus. This is a chronic condition that affects the patient’s care in terms of requiring diagnostic or therapeutic services or affecting patient outcomes or resource utilization. The patient has a history of type I diabetes mellitus and received an injection of neutral protamine Hagedorn insulin to normalize the blood sugar level prior to surgery. Therefore, it should be coded and reported as a secondary diagnosis 4.

References: 1: AHIMA CDIP Exam Prep, Fourth Edition, p. 133 2: ICD-10-CM Official Guidelines for Coding and Reporting FY 2021, Section II.A 3: AHA Coding Clinic for ICD-10-CM and ICD-10-PCS, Fourth Quarter 2016 4: ICD-10-CM Official Guidelines for Coding and Reporting FY 2021, Section III.C : AHIMA CDIP Exam Prep, Fourth Edition https://my.ahima.org/store/product?id=67077