PATIENT PORTAL . 844 Ritchie Highway, Suite 206. Severna Park, MD 21146. Pediatric Phone: 410-647-8300. Internal Medicine Phone: 410-647-8829. Billing Phone: 410-647-6907. After Hours Phone: 443-481-3061. Fax: 410-315-8444. Get Directions To: 844 Ritchie Highway, Suite 206 Severna Park Maryland 21146 USA . 844 Ritchie Highway, Suite 206 Severna ....