Exhibit 32.1

                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of HealthSpring, Inc. (the "Company") on
Form 10-Q for the period ending March 31, 2006, as filed with the Securities and
Exchange Commission on the date hereof (the "Report"), Herbert A. Fritch, Chief
Executive Officer of the Company, certifies, pursuant to 18 U.S.C. Section 1350,
as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

      (1)   The Report fully complies with the requirements of Section 13(a) or
            15(d) of the Securities Exchange Act of 1934; and

      (2)   The information contained in the Report fairly presents, in all
            material respects, the financial condition and results of operations
            of the Company.

/s/ HERBERT A. FRITCH
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Herbert A. Fritch
Chairman of the Board of Directors, President,
and Chief Executive Officer
May 15, 2006