Crossword Puzzle: Registration Abbreviations

123456789101112
Across
  1. 4. SPROG
  2. 6. PPO
  3. 9. DHS
  4. 11. OON
  5. 12. MCO
Down
  1. 1. COB
  2. 2. SSDI
  3. 3. MD
  4. 5. HMO
  5. 7. OOPM
  6. 8. RTE
  7. 10. MC