Can E55 9 be a primary diagnosis code?
                                
                                
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                                    3 min read                                
                            
                                Affecting nearly 1 billion people globally, vitamin D deficiency is a common diagnosis in primary care. For healthcare professionals, selecting the correct ICD-10 code is crucial for accurate patient records and billing, but there are specific guidelines that determine if E55.9 is appropriate for a primary diagnosis.