The definitive version of the coding guideline for the diagnosis of malnutrition has been available since 1 January 2014. This offers a further opportunity to promote malnutrition as an independent diagnosis combined with adequate nutritional therapy by a nutritionist. The commitment of the teams in the hospitals is still required for effective implementation.
Conditions
E43 (n.n.b. significant energy and protein malnutrition) can only be coded if the following conditions are met:
- Involvement of a BSc nutritional counsellor or qualified HF nutritional counsellor for nutrition therapy (corresponding CHOP codes)
- Deterioration of nutritional status grade 3
- The recording and mapping of the NRS as well as the degree of deterioration in nutritional status are mandatory for the coding of E43, E44.0, E44.1.
- The word "unintentional" was added to weight loss and food intake in the past week.
The coding guideline
- clarifies the definition of the diagnosis of malnutrition in SwissDRG
- Prevents misuse of the codes
- ensures quality assurance and consolidation in inpatient nutrition therapy

Statistics DRG and malnutrition
The DRG and Nutrition Working Group (SVDE/GESKES) provides regular information on the statistics on coding and malnutrition in Switzerland.
2022
The number of inpatient cases in the respective cantons was analysed, as well as the number of cases coded as energy and protein malnutrition (E44.1, E44.0, E43, E46), cachexia (R64) or sarcopenia (M62.5-). The number of nutrition therapy CHOP codes coded was also analysed.
The number of coded malnutrition diagnoses (E43, E44.0, E44.1, E46) is steadily increasing:
- 2012 = 1.1 %
- 2013 = 1.6 %
- 2014 = 2.2 %
- 2015 = 2.9 %
- 2016 = 3.4 %
- 2017 = 3.9 %
- 2018 = 5.7 %
- 2019 = 5.1 %
- 2020 = 5.9 %
- 2021 = 6.0 %
- 2022 = 6.3 %
Practical relevance of the non-specific code E46
Unfortunately, the unspecific code (E46) was again coded very often in 2022. This code was used in 25% of all cases with a coded malnutrition diagnosis. This occurs when the required criteria of the coding guideline were not met, such as the NRS not being shown and/or the nutritional therapy not being documented and/or only one nutritional therapy service being provided and/or the required documentation not being available to the coding department. This code has also no longer been relevant to revenue since 2015. The GESKES/SVDE DRG and Nutrition Working Group once again recommends that internal statistics be requested in your own hospitals. If the proportion of E46 is high, it is urgently recommended that the internal processes be evaluated, e.g. consistent implementation of screening using NRS-2002 and the availability of documentation of nutritional therapy with the required criteria to the coding department.
In psychiatric clinics, too, it is important to identify and treat malnutrition in accordance with professional criteria. It can also be cost-relevant here in certain cases.
Cachexia:
2015 = 0.25 %
2016 = 0.17 %
2017 = 0.18 %
2018 = 0.15 %
2019 = 0.15 %
2020 = 0.14 %
2021 = 0.12 %
2022 = 0.13 %
Sarcopenia:
2018 = 0.24 %
2019 = 0.35 %
2020 = 0.51 %
2021 = 0.57 %
2022 = 1.02 %
2021
The number of inpatient cases in the respective cantons was analysed, as well as the number of cases coded as energy and protein malnutrition (E44.1, E44.0, E43, E46), cachexia (R64) or sarcopenia (M62.5). The number of nutrition therapy CHOP codes coded was also analysed.
The number of coded malnutrition diagnoses (E43, E44.0, E44.1, E46) is steadily increasing:
- 2012 = 1.1 %
- 2013 = 1.6 %
- 2014 = 2.2 %
- 2015 = 2.9 %
- 2016 = 3.4 %
- 2017 = 3.9 %
- 2018 = 5.7 %
- 2019 = 5.1 %
- 2020 = 5.9 %
- 2021 = 6.0 %
Practical relevance of the non-specific code E46
Unfortunately, the unspecific code (E46) was again coded very often in 2021. This code was used in 25% of all cases with a coded malnutrition diagnosis. This occurs when the required criteria of the coding guideline were not met, such as the NRS not being shown and/or the nutritional therapy not being documented and/or only one nutritional therapy service being provided and/or the required documentation not being available for the coding department to view. This code has also no longer been relevant to revenue since 2015. The DRG and Nutrition working group once again recommends that internal statistics be requested in your own hospitals. If the proportion of E46 is high, it is strongly recommended that the internal processes are evaluated, e.g. consistent implementation of screening using NRS-2002 and the availability of documentation of nutritional therapy with the required criteria to the coding department.
Cachexia:
- 2015 = 0.25 %
- 2016 = 0.17 %
- 2017 = 0.18 %
- 2018 = 0.15 %
- 2019 = 0.15 %
- 2020 = 0.14 %
- 2021 = 0.12 %
Sarcopenia:
- 2018 = 0.24 %
- 2019 = 0.35 %
- 2020 = 0.51 %
- 2021 = 0.57 %
2020
The number of inpatient cases in the respective cantons was analysed, as well as the number of cases coded as energy and protein malnutrition (E44.1, E44.0, E43, E46), cachexia (R64) or sarcopenia (M62.5-). The number of nutrition therapy CHOP codes coded was also analysed.
The number of coded malnutrition diagnoses (E43, E44.0, E44.1, E46) is steadily increasing:
- 2012 = 1.1 %
- 2013 = 1.6 %
- 2014 = 2.2 %
- 2015 = 2.9 %
- 2016 = 3.4 %
- 2017 = 3.9 %
- 2018 = 5.7 %
- 2019 = 5.1 %
- 2020 = 5.9 %
Practical relevance of the non-specific code E46
Unfortunately, the non-specific code (E46) was again coded very frequently in 2020, albeit slightly less than in the previous year. This code was used in 24% of all cases with a coded malnutrition diagnosis. This occurs when the required criteria of the coding guideline were not met, such as the NRS was not mapped and/or the nutritional therapy was not documented and/or only one nutritional therapy service was provided and/or the required documentation is not available to the coding department. This code has also no longer been relevant to revenue since 2015. The DRG and Nutrition working group once again recommends that internal statistics be requested in your own hospitals and, if the proportion of E46 is high, that the internal processes be evaluated, e.g. screening using NRS-2002 and the availability of documentation and required criteria to the coding department.
Cachexia:
- 2015 = 0.25 %
- 2016 = 0.17 %
- 2017 = 0.18 %
- 2018 = 0.15 %
- 2019 = 0.15 %
- 2020 = 0.14 %
Sarcopenia:
- 2018 = 0.24 %
- 2019 = 0.35 %
- 2020 = 0.51 %
2019
The number of inpatient cases in the respective cantons was analysed, as well as the number of cases coded as energy and protein malnutrition (E44.1, E44.0, E43, E46), cachexia (R64) or sarcopenia (M62.5-). The number of nutrition therapy CHOP codes coded was also analysed.
The number of coded malnutrition diagnoses (E43, E44.0, E44.1, E46) is steadily increasing:
- 2012 = 1.1 %
- 2013 = 1.6 %
- 2014 = 2.2 %
- 2015 = 2.9 %
- 2016 = 3.4 %
- 2017 = 3.9 %
- 2018 = 4.5 %
- 2019 = 5.1 %
Unfortunately, the unspecific code (E46) was again coded very often in 2019, in 27 % of all cases with malnutrition. This code must be used if the required criteria of the coding guideline are not met. This code has also no longer been relevant to revenue since 2015. The DRG and Nutrition working group recommends that internal statistics be requested in your own hospitals and, if the proportion of E46 is high, that internal processes be evaluated, such as screening using NRS-2002 and the availability of documentation and required criteria to the coding department.
Cachexia:
- 2015 = 0.25 %
- 2016 = 0.17 %
- 2017 = 0.18 %
- 2018 = 0.15 %
- 2019 = 0.15 %
Sarcopenia:
- 2018 = 0.24 %
- 2019 = 0.35 %
2018
The number of inpatient cases in the respective cantons was analysed, as well as the number of cases coded as energy and protein malnutrition (E44.1, E44.0, E43, E46), cachexia (R64) or sarcopenia (M62.5-). The number of nutrition therapy CHOP codes coded was also analysed.
The number of coded malnutrition diagnoses (E43, E44.0, E44.1, E46) is steadily increasing:
- 2012 = 1.1 %
- 2013 = 1.6 %
- 2014 = 2.2 %
- 2015 = 2.9 %
- 2016 = 3.4 %
- 2017 = 3.9 %
- 2018 = 4.5 %
It is pleasing that the non-specific code (E46) was coded less frequently for the first time in 2018. This code must be used if the required criteria of the coding guideline are not met.
The number of cases with coded cachexia has hardly changed compared to previous years; sarcopenia was also analysed for us for the first time.
Cachexia:
- 2015 = 0.25 %
- 2016 = 0.17 %
- 2017 = 0.18 %
- 2018 = 0.15 %
Sarcopenia:
- 2018 = 0.48 %
2017
The analysis by the Federal Statistical Office for 2017 shows how many inpatient cases there were in the respective cantons and how many cases were coded as energy and protein malnutrition (E44.1, E44.0, E43, E46) or cachexia (R64). The number of nutrition therapy CHOP codes coded was also analysed.
The number of coded malnutrition diagnoses (E43, E44.0, E44.1, E46) is steadily increasing:
- 2012 = 1.1 %
- 2013 = 1.6 %
- 2014 = 2.2 %
- 2015 = 2.9 %
- 2016 = 3.4 %
- 2017 = 3.9 %
Unfortunately, the unspecific code (E46) was again coded very often in 2017, in 35 % of all cases with malnutrition. This code must be used if the required criteria of the coding guideline are not met. This code has also no longer been relevant to revenue since 2015. The DRG and Nutrition working group recommends that internal statistics be requested in your own hospitals and, if the proportion of E46 is high, that internal processes be evaluated, such as screening using NRS-2002 and the availability of documentation and required criteria to the coding department.
Presentations
The presentations of the GESKES/SVDE joint venture "Update on nutrition under SwissDRG: STReha, TARPSY and acute somatics" from 16 February 2023 in Bern are available.
Karen Triep: Swiss DRG updates: acute care, STReha and TARPSY
Anna-Barbara Sterchi: Swiss DRG: Review and outlook Submissions GESKES/SVDE
Prof Peter Ballmer: Diagnosis and treatment of sarcopenia in everyday practice
Nick Vonzun: Development of malnutrition coding: The non-specific malnutrition code E 46 - what does it cost us?
Dr Mohammed Barigou, MD: GLIM: A new diagnostic tool for malnutrition in clinical practice
Pascal Tribolet: GLIM: Evidence and consequences for clinical practice
Maya Rühlin, Nick Vonzun: Tricky cases from practice