June 16, 2006



United States Securities and Exchange Commission
Division of Corporation Finance
450 Fifth Street NW
Washington, DC 20549

Re:    ICU Medical, Inc.
       Form 10-K for the Fiscal Year Ended December 31, 2005
       Form 10-Q for the Fiscal Quarter Ended March 31, 2006
       File No. 000-19974

This letter is in response to the Staff's comment letter dated May 25, 2006.

Form 10-K for the Fiscal Year Ended December 31, 2005
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Note 1. Summary of Significant Accounting Po1icies, page 4
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k. Revenue Recognition, page 46
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1.   Please refer to prior comment 4. Please tell us who has the risk of loss in
     the event of theft or physical destruction or damage to the product. For
     example, please tell us if you retain a "warehouse risk" where if the
     products are damages while in your possession you are responsible for the
     damage. Note that SAB 104 states that four criteria must be met in order to
     recognize revenue when delivery has not occurred. In this regard, please
     tell us if the sellers' custodial risks are insurable and insured.

         Response:

         The products are owned by Hospira. ICU Medical has the normal warehouse
         risk for loss or damage to products while in its custody. That risk is
         insurable and is insured, subject to a $5,000 deductible. The cost of
         this insurance and the deductible amount in the event of loss are
         included in costs which are allocable to Hospira under the transition
         services agreement.

         Hospira has confirmed to us that the products are included in Hospira's
         consolidated balance sheet. We do not know what audit procedures
         Hospira's independent registered public accountants applied to the
         product inventory at Hospira's year-end, but to our knowledge they did
         not observe a physical inventory of the products.

2.   In this regard, we note that your prices and gross margins on products you
     sell to Hospira under the MCDA are based on the cost savings that you are
     able to achieve in producing the products over Hospira's cost to
     manufacture the same product. We note you record revenue net of any such
     reductions. Please tell us how you are able to estimate this amount at the
     time of shipment. Explain what will happen if you are unable to achieve
     cost savings over Hospira's prior costs. Specifically, tell us if you would
     sell products to Hospira below cost.

         Response:

         We do not estimate the amount of cost savings that are applied to
         reduce revenue at the time of shipment and it is not required under the
         MCDA. We invoice the products sold to Hospira at an initial Transfer
         Price, which initially was equal to the Fully Burdened Manufacturing
         Cost ("FBMC") at the effective date of the MCDA, and which currently is
         that initial Transfer Price minus Hospira's portion of a Cost Savings
         Estimate; those invoiced amounts are recorded as revenue. On a
         quarterly basis, before publication of our financial statements,
         Hospira's portion of the actual cost savings is calculated and Hospira
         is charged or credited for the difference between estimated and actual
         cost savings; we record that charge or credit as an adjustment to that
         quarter's revenue. There are several different calculations, depending
         on the type of product, but the objectives of the calculations are
         essentially the same.

         If we are unable to achieve cost savings over Hospira's prior costs, we
         would invoice Hospira for costs up to the initial Transfer Price,
         subject to a lower ceiling starting in 2007. Based on cost savings
         achieved to date, our revenue net of cost savings in all periods would
         be below the price ceiling. We do not believe we will ever have a
         situation where pricing under the MCDA would result in us selling
         products to Hospira below cost.


Form l0-Q for the Fiscal Quarter Ended March 3l, 2006
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Condensed Consolidated Statements of Cash flows, page 5
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3.   Please refer to prior comment 2. Item 10(e)(1)(ii)(C) of Regulation S-K
     prohibits the presentation of non-GAAP financial measures on the face of
     financial statements prepared in accordance with GAAP. We note your
     presentation of the subtotal in the operating activities section creates
     the non-GAAP measure "net cash flows provided by operating activities
     before tax benefits from exercise of stock options in 2005". Accordingly,
     please revise the filing to remove the subtotal line from the cash flows
     statement.

         Response:

         We will revise the Statement as requested by amendment.


Exhibit 31.2
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4. We note the Section 302 certification of your CEO is not in the proper form
as it references Francis J. O'Brien as the "Chief Executive Officer."
Accordingly, please file an amendment to your Form 10-Q with the properly
labeled certifications of each.

         Response:

         The above described failure to follow proper form was a typographical
         error. We will file the requested amendment.


Exhibit 32
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5.   We note that your Section 906 certifications furnished in accordance with
     Item 601(b)(32) of Regulation S-K are not dated. Please file an amendment
     to your Form 10-Q that includes the entire filing together with the
     properly dated Section 906 certification.

         Response:

         We will file the requested amendment.

We will defer filing the amendment to the Form 10-Q, pending your review of this
response.

Very truly yours,


/s/ Francis J. O'Brien
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Francis J. O'Brien
Chief Financial Officer