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Objectives: We sought to determine the prevalence of immune-mediated skin disorders (Imds), their oral manifestations, and the related comorbidity among Omani patients with Imds attending the outpatient department of dermatology and dental Clinic at al nahdha Hospital, muscat. Methods: We conducted a retrospective study of 236 newly-diagnosed patients with Imds who attended the outpatient clinic between September 2014 and September 2017. data, such as age, sex, investigations, diagnosis, comorbidity, and associated oral manifestations of the affected individuals, were collected from the hospital health information system. Results: Of the 236 diagnosed cases of Imd, lichen planus substantially comprised over half of the total cases (59.7%). This was followed by relatively fewer cases of discoid lupus erythematosus (11.0%), systemic lupus erythematosus (10.2%), and erythema multiforme (8.1%). Pemphigus vulgaris and bullous pemphigus comprised only 3.0% and 4.2% of the total studied cases, respectively. The other less common disorders found in our study were toxic epidermal necrolysis (1.7%), pemphigus foliaceus (1.3%), and gestational pemphigoid (0.8%). Oral mucosal involvement was seen more commonly with lichen planus (78.7%), pemphigus vulgaris (71.4%), and erythema multiforme (75.0%), while systemic lupus erythematosus and discoid lupus erythematosus were shown to appear with more comorbidities compared to the other skin disorders studied. Conclusions: Several Imds have considerable oral involvement. These oral manifestations of the diseases may be overlooked by other specialists leading to a delay in the diagnosis and its management. In order to circumvent this delay, the analysis and evaluation of a disease need to be done by a team comprising of a dental surgeon, dermatologist, and an oral medicine specialist. [ABSTRACT FROM AUTHOR]