Former Trump attorney Michael Cohen will testify before three congressional committees before he goes to prison on March 6, his lawyer confirmed Wednesday.

"Cohen committed to all three committees that he would voluntarily testify before the end of the month," Cohen's attorney Lanny Davis said in a statement released Tuesday night.

CNBC first reported Wednesday that Cohen will testify before the House Oversight and Reform, Senate Intelligence and House Intelligence committees. Only his testimony from the Oversight and Reform Committee will be made public. 

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Last year, Cohen pleaded guilty to bank fraud, tax fraud, campaign finance law violations and making misstatements to Congress. He has been cooperating with special counsel Robert MuellerRobert (Bob) MuellerSenate Democrats urge Garland not to fight court order to release Trump obstruction memo Why a special counsel is guaranteed if Biden chooses Yates, Cuomo or Jones as AG Barr taps attorney investigating Russia probe origins as special counsel MORE's investigation into Russia's election interference and allegations that the president or his staff colluded with Russia during the 2016 election.

Cohen will not answer questions regarding Mueller's investigation, Reps. Jim JordanJames (Jim) Daniel JordanHouse GOP leaders urge 'no' vote on Bannon contempt Cheney presses Republicans to back Bannon contempt vote GOP's embrace of Trump's false claims creates new perils MORE (R-Ohio) and Mark MeadowsMark MeadowsMeadows hires former deputy AG to represent him in Jan. 6 probe: report The Hill's 12:30 Report - Presented by Altria - White House tackles how to vaccinate children ages 5+ Jan. 6 panel votes to hold Bannon in contempt MORE (R-N.C.) said in a letter to Cohen's lawyer last month. Cohen will instead discuss “personal anecdotes” about working with President TrumpDonald TrumpTrump announces new social media network called 'TRUTH Social' Virginia State Police investigating death threat against McAuliffe Meadows hires former deputy AG to represent him in Jan. 6 probe: report MORE and his “experiences” after Trump became president.

Cohen was supposed to testify before Congress this week, but told lawmakers he could not for medical reasons.

"I can assure you that any goodwill that might have existed in the committee with Michael Cohen is now gone," Senate Intelligence Committee Chairman Richard BurrRichard Mauze BurrDemocratic incumbents bolster fundraising advantage in key Senate races McConnell gets GOP wake-up call Senate approves short-term debt ceiling increase MORE (R-N.C.), told reporters Tuesday after the cancellation.

"He's already stiffed us on being in Washington today because of an illness," Burr added. "Yet on Twitter, a reporter reported he was having a wild night Saturday night eating out in New York with five buddies, didn't seem to have any physical limitations. And he was out with his wife last night."

Cohen's attorney defended his medical reasons in a statement on Tuesday night.

“Despite Senator Burr’s inaccurate comment, Mr. Cohen was expected to and continues to suffer from severe post shoulder surgery pain," Davis said. "The medication Mr. Cohen is currently taking made it impossible for him to testify this week.

"We believe Senator Burr should appreciate that it is possible for Mr. Cohen to be in pain and still have dinner in a restaurant with his wife and friends.”

-Morgan Chalfant contributed to this report which was updated at 3 p.m.