Medicare Claims Processing Manual (Pub. 100-04), Ch. 27 § 20.2.3
Adjustments/Cancels to Posted Claims
20.2.3 - Adjustments/Cancels to Posted Claims
(Rev. 4009, Issued: 03-23-18, Effective: 04-23-18, Implementation: 04-23-18)
Two actions can be taken on a claim that is already posted to CWF history. These actions
are the same whether submitted by an A/B MAC or DME MAC; however, the codes used
are different:
• Void - Use a void to cancel original data on the beneficiary database and totally
remove the dollar amounts. To void a posted claim, send the claim with the
original document control number and a "Full Credit" code (Entry Code 3 for A/B
MACs (B) and DME MACs and Action Code 4 for A/B MACs (A, HHH))).
• Change - Send a full claim with a "Replacement Debit" code (Entry Code 5 for
A/B MACs (B) and DME MACs and Action Code 3 for A/B MACs (A, HHH)) and
the original document control number to make a change to a posted claim. This
code is used to change most claims information. The old claim information will
be backed out and replaced with the new claim information. The CWF will keep
a record of the old claim so that any investigation of the actions taken on the
claim will include the fact that there was a replacement action taken.