Asia-Pacific Economic Cooperation, or APEC, is the premier forum for facilitating economic growth, cooperation, trade and investment in the Asia-Pacific region.
Provider Transaction Access Number (PTAN) A PTAN is a Medicare-only number issued to providers by MACs upon enrollment to Medicare. When a MAC approves enrollment and issues an approval letter, the letter will contain the PTAN assigned to the provider.
PTAN - Provider Transaction Access Number. 1  EPA Environmental Protection Agency. 2  FDA Food and Drug Administration. 3  IT Information Technology. 4  OMB Office of Management and Budget. 5  FY Fiscal Year. 6  NIH National Institutes of Health. 7  NIOSH National Institute for Occupational Safety and Health.