Leading Medical Billing services provider in Baltimore, Maryland (MD). Boost your practice revenue with 24/7 Medical Billing Services. Leading Medical Billing services provider in Baltimore, Maryland (MD). Boost your practice revenue with 24/7 Medical Billing Services. Baltimore is the largest city in the state of Maryland of US. This city has a lot of things to take the pride as national anthem of US is birthed from here; the city has the second largest sea port in the country. The sea port of Baltimore is the second largest entry for the immigrants to US and also for loading and unloading the manufacturing goods. Baltimore is one of the country’s largest whiskey manufacturer and also straw hats. The city was known for shipping and steel but these days service industry is more famous.