Many organizations provide information to help understand and support the medical billing industry. A few of them are listed here. Please let us know about others that should be added.

http://www.oig.hhs.gov
HHS Office of Inspector General

http://www.cms.hhs.gov
The Centers for Medicare and Medicaid Services.

http://www.cms.hss.gov/hipaa
HIPAA information (the Health Insurance Portability and Accountability Act).

http://www.HBMA.org
The Healthcare Billing Management Association.

http://www.MGMA.com
The Medical Group Management Association.

http://www.HFMA.org
The Healthcare Financial Management Association.

http://www.ambanet.net
The American Medical Billing Association.

http://www.rbma.org
The Radiology Business Management Association.

http://www.asahq.org
The American Society of Anesthesiologists.

http://www.aaasc.org
The American Association of Ambulatory Surgery Centers.

http://www.ahima.org
The American Health Information Management Association.

http://www.himss.org
The Health Information and Management Systems Society.

http://www.aha.org
The American Hospital Association.

http://www.ama-assn.org
American Medical Association: publisher of CPT codes.

http://www.aapc.com
The American Academy of Professional Coders.

General medical links:

http://health.nih.gov
National Institute of Health

http://www.cdc.gov
The Center for Disease Control and Prevention

http://www.nejm.org

The New England Journal of Medicine