Athenahealth Inc.’s quarterly net income fell on costs tied to its purchase of the medicine-app maker Epocrates. The deal boosted revenue, but one-time costs trimmed profits. Athenahealth also spent more on stock-based compensation. Athenahealth said full-year earnings will be at the low end of its projected range. And Hospital Physician Partners, a medical management and staffing firm, has selected athenahealth’s cloud-based services to upgrade medical billing and patient communications. It serves about 100 hospitals.