CoDifiCaR – Chronic kidney disease coding: what’s its relevance? A multicenter study in six Family Health Units in Vila Nova de Gaia

Authors

  • Anita Marques Assistente de Medicina Geral e Familiar. USF Canaviais, ULS de Gaia e Espinho. Vila Nova de Gaia, Portugal.
  • Ana Rita Pedrosa Assistente de Medicina Geral e Familiar. USF Canaviais, ULS de Gaia e Espinho. Vila Nova de Gaia, Portugal.
  • Ana Rita Monteiro Assistente de Medicina Geral e Familiar. USF Coração do Douro, ULS de Trás-os-Montes e Alto Douro. São João da Pesqueira, Portugal.
  • Mariana Teixeira Horta Assistente de Medicina Geral e Familiar. USF Nova Salus, ULS de Gaia e Espinho. Vila Nova de Gaia, Portugal.
  • Ana Isabel Teixeira Médica Interna de Medicina Geral e Familiar. USF Gaya, ULS de Gaia e Espinho. Vila Nova de Gaia, Portugal.
  • Marta Perro Neves Médica Interna de Medicina Geral e Familiar. USF Arco do Prado, ULS de Gaia e Espinho. Vila Nova de Gaia, Portugal.
  • Inês Rodrigues Assistente de Medicina Geral e Familiar. UCSP Norte (Mozelos), ULS de Entre Douro e Vouga. Santa Maria da Feira, Portugal.
  • Pedro Sonié Assistente de Medicina Geral e Familiar. USF Saúde no Futuro, ULS de Gaia e Espinho. Vila Nova de Gaia, Portugal.

DOI:

https://doi.org/10.32385/rpmgf.v41i2.13871

Keywords:

Chronic kidney disease, Codification, ICPC-2, Glomerular filtration rate, Primary health care

Abstract

Introduction: Chronic kidney disease (CKD) represents a serious public health problem. Some of the main risk factors for its development are common to the leading causes of morbidity in primary health care, making it important to identify these patients and register the problem in the computerized clinical file.

Objectives: We aim to estimate the prevalence of CKD in the Family Health Units (USF) studied and identify the factors that influence the physician’s coding of CKD.

Methods: Participants from the six USF participating in the study (n=55) who had a record of creatinine value in the last five years were included. A questionnaire was applied to physicians at these USFs to assess possible barriers associated with CKD coding.

Results: 30,760 participants were included in the study. Of these, 4,800 had a GFR <60ml/min (15.6%), and 1,863 had the U99 code (6.1%). Only 2.8% simultaneously had a GFR <60ml/min and a U99 code (n=862). The prevalence of CKD was 6.4%. The questionnaire had a response ratio of 69.1%. Most physicians reported they knew the U99 code (n=33, 86.9%) and referred to using it (n=31, 81.6%). The main reasons that influenced the non-coding were forgetfulness (n=21, 55.3%), lack of time in the consultation (n=19, 50%), and the lack of a specific International Classification of Primary Care, 2nd edition (ICPC-2) code for CKD (n=16, 42.1%).

Conclusions: Given the prevalence of CKD and its implications, it must be registered in the list of problems. A more specific code for CKD would allow better identification and monitoring of these patients.

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References

1. Kidney Disease: Improving Global Outcomes (KDIGO) CKD Work Group. KDIGO 2012 clinical practice guideline for the evaluation and management of chronic kidney disease. Kidney Int Suppl. 2013;3:1-150.

2. Schoolwerth AC, Engelgau MM, Hostetter TH, Rufo KH, Chianchiano D, McClellan WM, et al. Chronic kidney disease: a public health problem that needs a public health action plan. Prev Chronic Dis. 2006;3(2):A57.

3. Vinhas J, Gardete-Correia L, Boavida JM, Raposo JF, Mesquita A, Fona MC, et al. Prevalence of chronic kidney disease and associated risk factors, and risk of end-stage renal disease: data from the PREVADIAB study. Nephron Clin Pract. 2011;119(1):c35-40.

4. Vinhas J, Aires I, Batista C, Branco P, Brandão J, Nogueira R, et al. RENA study: cross-sectional study to evaluate CKD prevalence in Portugal. Nephron. 2020;144(10):479-87.

5. Coelho A, Diniz A, Hartz Z, Dussault G. Gestão integrada da doença renal crónica: análise de uma política inovadora em Portugal [Integrated management of chronic kidney disease: analysis of an innovative policy in Portugal]. Rev Port Saúde Pública. 2014;32(1):69-79. Portuguese

6. Ammirati AL. Chronic kidney disease. Rev Assoc Med Bras. 2020;66 Suppl 1:s03-9.

7. National Health Service. Chronic kidney disease: overview [homepage]. London: NHS; 2023 [updated 2023 Mar 22; cited 2023 Apr 17]. Available from: https://www.nhs.uk/conditions/kidney-disease/

8. Levey AS, de Jong PE, Coresh J, El Nahas M, Astor BC, Matsushita K, et al. The definition, classification, and prognosis of chronic kidney disease: a KDIGO Controversies Conference report. Kidney Int. 2011;80(1):17-28. Erratum in: Kidney Int. 2011;80(9):1000.

9. Said S, Hernandez GT. The link between chronic kidney disease and cardiovascular disease. J Nephropathol. 2014;3(3):99-104.

10. Vassalotti JA, Centor R, Turner BJ, Greer RC, Choi M, Sequist TD, et al. Practical approach to detection and management of chronic kidney disease for the primary care clinician. Am J Med. 2016;129(2):153-62.e7.

11. Silva B, Valente CP, Lourenço G, Coelho GM, Rola JE, Magalhães L, et al. Plano local de saúde: ACeS Gaia 2015-2020 [homepage]. Vila Nova de Gaia: Unidade de Saúde Pública do ACeS Gaia; 2015. Available from: https://bicsp.min-saude.pt/pt/biufs/1/10023/Pages/default.aspx

12. Nagtegaal R, Tummers L, Noordegraaf M, Bekkers V. Nudging healthcare professionals towards evidence-based medicine: a systematic scoping review. J Behav Public Admin. 2019;2(2):1-20.

13. Pinto D, Corte-Real S. Codificação com a classificação internacional de cuidados primários (ICPC) por internos de medicina geral e familiar [International classification for primary care (ICPC) coding by family medicine trainees]. Rev Port Clin Geral. 2010;26(4):370-82. Portuguese

14. Serviço Nacional de Saúde. Consultas médicas nos cuidados de saúde primários [homepage]. Lisboa: Ministério da Saúde; 2023 [cited 2023 Apr 17. Available from: https://transparencia.sns.gov.pt/explore/embed/dataset/evolucao-das-consultas-medicas-nos-csp/table/?sort=tempo

Published

2025-05-15

How to Cite

CoDifiCaR – Chronic kidney disease coding: what’s its relevance? A multicenter study in six Family Health Units in Vila Nova de Gaia. (2025). Portuguese Journal of Family Medicine and General Practice, 41(2), 129-34. https://doi.org/10.32385/rpmgf.v41i2.13871