Although these issues may affect reimbursement, the starting point is always compliance.
Skilled nursing facilities should routinely review two commonly misunderstood documentation and coding areas: obesity/BMI coding and malnutrition or at risk for malnutrition. Although these issues may affect reimbursement, the starting point is always compliance. Both require accurate, provider-supported documentation and a medical record that clearly supports the diagnosis being reported.
One of the most common coding errors occurs when facilities assign morbid obesity, class 3 obesity, malnutrition, or risk for malnutrition codes based solely on a documented BMI, a dietitian-completed Mini Nutritional Assessment (MNA), or related risk factors. While BMI values and risk factors may be documented by dietitians or nursing staff, the associated diagnosis of obesity, malnutrition, or at risk for malnutrition must be documented by the physician or other qualified provider who is legally accountable for establishing the diagnosis.
With obesity diagnoses carrying potential PDPM reimbursement implications, it is essential that facilities understand the distinction between BMI documentation and provider-documented diagnoses. Accurate coding is not simply about identifying a number on the scale. It is also about ensuring the medical record fully supports the diagnosis being reported.
For example, a BMI of 42 alone does not justify coding morbid obesity or class 3 obesity. However, when the provider documents obesity, morbid obesity, or class 3 obesity, and the documentation is not contradicted elsewhere in the record, the diagnosis may be coded as supported. If the BMI, diagnosis, or clinical picture appears inconsistent, the provider should be queried for clarification.
Similarly, facilities are seeing increased scrutiny regarding coding I5600, Malnutrition (protein or calorie) or At Risk for Malnutrition. A dietary assessment or dietitian note may support the clinical picture, but it cannot independently establish the diagnosis. To code malnutrition or at risk for malnutrition, the provider must clearly document the condition within the 60-day look-back period, and the diagnosis must be active during the 7-day look-back period. This reinforces the importance of provider education and documentation consistency across the interdisciplinary team.
This distinction is especially important under PDPM because weight-related diagnoses can impact the Non-Therapy Ancillary (NTA) component. Morbid obesity and malnutrition or risk for malnutrition each carry one NTA point when accurately documented, active, and coded in accordance with MDS and ICD-10-CM guidance.
As clinical terminology and documentation expectations continue to evolve, collaboration between providers, dietitians, nursing staff, MDS teams, and coders remains essential. Careful documentation review supports compliant, defensible coding while also protecting reimbursement integrity.
As the regulatory and reimbursement landscape continues to evolve, staying on top of changes can feel overwhelming. At Polaris Group, we are committed to helping providers navigate these complexities with confidence through practical education, regulatory insight, and real-world operational support. Ask Amanda was created to provide timely guidance and meaningful clarification on the issues impacting today’s MDS and clinical reimbursement teams. We welcome your questions and topic suggestions for future articles, and we thank you for your continued partnership and dedication to compliance excellence and resident-centered care.
