Cost of Diagnosing Psoriasis and Rosacea for Dermatologists Versus Primary Care Physicians
Growing incentives to control health care costs may cause accountable care organizations (ACOs) to reconsider how skin disease is best managed. Limited data have suggested that disease management by a primary care physician (PCP) may be less costly than seeing a specialist, though it is not clear if the same is true for the management of skin disease. This study assessed the cost of seeing a dermatologist versus a PCP for diagnosis of psoriasis and rosacea.
Practice Points
- Growing health care costs are causing accountable care organizations (ACOs) to reconsider how to best manage skin disease.
- There is little difference in average diagnosis-related cost between primary care physicians and dermatologists in diagnosing psoriasis or rosacea.
- With diagnosis costs essentially equal and increased dermatologist diagnostic accuracy, ACOs may encourage skin disease to be managed by dermatologists.
Comment
For the management of common skin disorders such as psoriasis and rosacea, there is little cost difference in seeing a dermatologist versus a PCP. Through extensive training and repeated exposure to many skin diseases, dermatologists are expected to be more comfortable in diagnosing and managing psoriasis and rosacea. Compared to PCPs, dermatologists have demonstrated increased diagnostic accuracy and efficiency when examining pigmented lesions and other dermatologic diseases in several studies.3-6 Although the current study shows that diagnosis-related costs for psoriasis and rosacea are essentially equal between dermatologists and PCPs, it actually may be less expensive for patients to see a dermatologist, as unnecessary tests, biopsies, or medications are more likely to be ordered/prescribed when there is less clinical diagnostic certainty.7,8 Additionally, seeing a PCP for diagnosis of a skin disease may be inefficient if subsequent referral to a dermatologist is needed, a common scenario that occurs when patients see a PCP for skin conditions.9
Our study had limitations, which is typical of a study using a claims database. We used ICD-9 codes recorded in patients’ medical claims to determine diagnosis of psoriasis and rosacea; therefore, our study and data are subject to coding errors. We could not assess the severity of disease, only the presence of disease. Further confirmation of diagnosis could have been made through searching for a second ICD-9 code in the patient’s history. Our data also are from a limited time period and may not represent costs from other time periods.
Conclusion
Given the lack of cost difference between both specialties, we conclude that ACOs should consider encouraging patients to seek care for dermatologic diseases by dermatologists who generally are more accurate and efficient skin diagnosticians, particularly if there is a shortage of PCPs within the ACO network.
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