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Thank you for your question.

The Social Security History page on the SSA Web site has many historical documents, essays, and other information that I think will be helpful to your research.

You can find a brief summary of the floor debates and votes for Medicare (the Social Security Amendments of 1965) at https://www.ssa.gov/history/tally65.html

You can find a much more detailed legislative history of Medicare at https://www.ssa.gov/policy/docs/ssb/v28n9/v28n9p3.pdf 

There is a massive, multi-volume compilation of the full text of all the documents produced during the legislative process (These are part of a larger set of Social Security legislative histories called the "Downey Books") .

Click on the headings below to see the full text of that volume (I have included the table of contents beneath each heading):

Social Security Amendments of 1965 Vol 1

I. Reported to House

A. Committee on Ways and Means Report
House Report No. 213 (to accompany H.R. 6675)--March 29, 1965

B. Committee Bill Reported to the House
H.R. 6675 (reported without amendment)—March 29, 1965

C. Summary of Major Provisions of H.R. 6675, the "Social Security Amendments of 1965" as Reported to the House of Representatives by the Committee on Ways and Means on March 29, 1965—Committee Print

D. Statement of the President—March 23, 1965

E. Social Security and Federal Employment, A Report Requested by the Committee on Ways and Means, Submitted by the United States Civil Service Commission and the Social Security Administration, Department of Health, Education, and Welfare—Committee Print—March 13, 1965

II. Passed House

A. House Debate—Congressional Record— April 7—8, 1965

B. House-Passed Bill
H.R. 6675 (without amendment)— April 9, 1965

Social Security Amendments of 1965 Vol 2

III. Reported to Senate

A. Committee on Finance Report
Senate Reports No. 404 (to accompany H.R. 6675) Parts 1 and 2— June 30, 1965

B. Committee Bill Reported to the Senate
H.R. 6675 (reported with amendments)— June 30, 1965

C. Text of and Justifications for Amendments to H.R. 6675
Recommended by the Department of Health, Education, and Welfare—Committee Print— June 3, 1965

Social Security Amendments of 1965 Vol 3

IV. Passed Senate

A. Senate Debate—Congressional Record— June 30, July 6—9, 1965

B. Senate Amendments—July 9, 1965

C. Senate-Passed Bill with Numbered Amendments—July 9, 1965

Social Security Amendments of 1965 Vol 4

IV. Passed Senate (cont.)

D. House and Senate Conferees—Congressional Record— July 12, 1965

E. Brief Description of Senate Amendments to H.R. 6675—Conference Committee Print

F. Actuarial Cost Estimates for the Old-Age, Survivors, and Disability Insurance System as Modified by H.R. 6675 and for the Health Insurance System for the Aged Established by H.R. 6675, as Passed by the House of Representatives and as According to the Action of the Senate-July 10, 1965

V. Conference Report (reconciling differences in the disagreeing votes of the two Houses)

A. House Report No. 682-July 26, 1965

B. House Debate-Congressional Record--July 21, 26-27, 1965

C. Senate Debate—Congressional Record— July 27—28, 1965

D. Committee on Ways and Means, House of Representatives, Summary of Major Provisions of H.R. 6675, The Social Security Amendments of 1965 as Reflected by the Agreement Reached Between the House and Senate Conferees Together with Actuarial DataCommittee Print— July 24, 1965

VI. Public Law

A. Public Law 89-97~89th Congress-July 30, 1965

B. Text of the Remarks of the President at the Signing of the Medicare Bill, Independence, Missouri--July 30, 1965

C. Actuarial Cost Estimates and Summary of Provisions of the Old-Age, Survivors, and Disability Insurance System as Modified by the Social Security Amendments of 1965 and Actuarial Cost Estimates and Summary of Provisions of the Hospital Insurance and Supplementary Medical Insurance Systems as Established by Such Act—Committee Print—July 30, 1965

D. Elements of Entitlement and Benefits Available Under the Hospital Insurance Benefits for the Aged and the Supplementary Medical Insurance Benefits for the Aged Programs Provided in the Social Security Amendments of 1965—Senate Document No. 46--August 5, 1965

E. Committee on Ways and Means, House of Representatives, Summary of Major Provisions of Public Law 89—97, The Social Security Amendments of 1965— September 1965

VII. Senate Publications

A. Brief Summary of Major Provisions of and Detailed Comparison Showing Changes Made in Existing Law by H.R. 6675 as Passed by the House of Representatives

B. Brief Summary of Major Provisions of and Detailed Comparison Showing Changes Made in Existing Law by H.R. 6675 as Reported by the Committee on Finance

C. The Social Security Amendments of 1965—Public Law 97, 89th Congress, Brief Summary of Major Provisions and Detailed Comparison with Prior Law

Social Security Amendments of 1965 Vol 5

Appendix

President's Message
Message from the President of the United States Transmitting Advancing the Nation's Health—House Document No. 44-January 7, 1965

Administration Bills
H.R. 1 (as introduced)--January 4, 1965
Remarks by Congressman King—Congressional Record--January 4, 1965
Commissioner's Bulletin No. 20, The Social Security Amendments of 1965 January 4, 1965
S. 1 (as introduced)--January 6, 1965
Remarks by Senator Anderson—Congressional Record—January 6, 1965

Testimony
Statement by Anthony J. Celebrezze, Secretary of Health, Education, and Welfare before the Committee on Ways and Means on H.R. 1, Hospital Insurance, Social Security, and Public Assistance Amendments of 1965—January 27, 1965
Statement by Anthony J. Celebrezze, Secretary of Health, Education, and Welfare before the Committee on Finance on H.R. 6675—April 29, 1965

Actuarial Study No. 59
Actuarial Cost Estimates for Hospital Insurance Act of 1965 and Social Security Amendments of 1965, Actuarial Study No. 59— January 1965

Major Alternative Proposal
H.R. 4351 (as introduced)-February 4, 1965
Remarks by Congressman Byrnes—Congressional Record— February 4, 1965

Publication
Social Security Amendments of 1965: Summary and Legislative History by Wilbur J. Cohen and Robert M. Ball—Reprinted from the Social Security Bulletin— September 1965

Commissioner's Bulletins
No. 27, Senate Committee on Finance Acts on H.R. 6675—June 25, 1965
No. 28, Senate Passes Social Security Amendments of 1965—July 10, 1965
No. 29, House-Senate Conference Agrees on Provisions of H.R. 6675—July 21, 1965

Listing of Reference Materials 

AMENDMENTS TO THE RAILROAD RETIREMENT ACT

I hope this information is helpful. If this is not what you need, or if you should require any further assistance, please let us know.

Bobby Griffith
Government Information Reference Specialist
Eagle Commons Library
University of North Texas Libraries
Bobby.Griffith@unt.edu