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Our physician coded 401.1 and then 425.8 on a patient. They ordered an echo for the patient because of cardiomyopathy but because 425.8 is a secondary code and may not be used as a primary diagnosis, can we change it to 425.4?
Since the doctor coded 401.1 (Benign hypertension) and 425.8 (Cardiomyopathy in other diseases classifed elsewhere, I would use codes:
402.10 (Benign hypertensive heart without heart failure) OR 402.11 ( with heart failure) depending on the circumstance.
425.8 ( Cardiomyopathy in other diseases classified elsewhere) as additional code.
The reason why I picked these codes is because the Coding Guidelines in ICD-9-CM under the heading "Hypertension with heart disease" states:
Heart conditions (425.8, 429.0-429.3, 429.8, 429.9) are assigned to a code from category 402 when a casual relationship is stated (due to hypertension) or implied (hypertensive).