PRIME MEDICAL SERVICES INC /TX/
EX 10.138 3RD SUPPLEMENT TO MEMORANDUM - INDIANA I
<DOCUMENT>
<TYPE>EX-10.138
<SEQUENCE>51
<FILENAME>0051.txt
<DESCRIPTION>EX 10.138 3RD SUPPLEMENT TO MEMORANDUM - INDIANA I
<TEXT>

                THIRD SUPPLEMENT DATED SEPTEMBER 26, 2000 TO THE

                 CONFIDENTIAL PRIVATE PLACEMENT MEMORANDUM DATED

                                  JUNE 28, 2000

                   INDIANA LITHOTRIPTERS LIMITED PARTNERSHIP I

                  Indiana   Lithotripters  Limited  Partnership  I,  an  Indiana
limited partnership (the "Partnership"),  by this Third Supplement hereby amends
and supplements its Confidential  Private Placement Memorandum of June 28, 2000,
as amended (the "Memorandum").  Capitalized terms used herein are defined in the
Glossary  appearing in the  Memorandum.  Persons who have  subscribed for or are
considering  an  investment  in  the  Units  offered  by the  Memorandum  should
carefully review this Third Supplement.

Extension of the Offering

                  Pursuant to the authority  given to the General Partner in the
Memorandum, the General Partner hereby elects to extend the offering termination
date to October 6, 2000 (or earlier in the  discretion  of the General  Partner,
upon the sale of all Units as provided in the Memorandum).
</TEXT>
</DOCUMENT>
