<DOCUMENT>
<TYPE>EX-18
<SEQUENCE>2
<FILENAME>zynex10qsbex18_5122006.txt
<TEXT>
                                                                      Exhibit 18

May 12, 2006


Zynex Medical Holdings, Inc.
Mr. Peter J. Leveton
8100 Southpark Way
Littleton, CO 80120

Dear Mr. Leveton:

As discussed in Note 2 to the financial statements for the three months ended
March 31, 2006, the Company changed its method of classification of costs
incurred for shipping and handling ("freight out costs") from classifying these
costs as a component of "cost of sales and rentals" to classifying these costs
as a component of selling, general and administrative expenses. Management
considers these costs to be part of its marketing program and therefore
considers the classification as selling, general and administrative expenses to
be more appropriate. As you have requested, we have discussed with you the
circumstances, business judgment, and all other underlying factors that
contributed to your decision to make this accounting change.

Based on our review of the attendant circumstances and discussions with
management, we concur that the newly adopted accounting principle of classifying
freight out costs as a component of selling, general and administrative expenses
as described in Note 2 is preferable under the circumstances. Because we have
not audited any financial statements of the Company as of any date or for any
period subsequent to December 31, 2005, we do not express an opinion on the
financial statements for the three months ended March 31, 2006.

Very truly yours,



/s/ GHP Horwath, P.C.
---------------------
GHP Horwath, P.C.
Denver, Colorado
</TEXT>
</DOCUMENT>
