LDH (Lactate Dehydrogenase) Pretreatment Lab Value
**Note 1:** Physician statement of LDH (Lactate Dehydrogenase) Pretreatment Lab Value can be used to code this data item when no other information is available.
**Note 2:** Record the lab value of the highest serum LDH test results documented in the medical record **prior to treatment** or within 6 weeks of diagnosis. Give priority to the first test performed. The lab value may be recorded in a lab report, history and physical, or clinical statement in the pathology report.
**Note 3:** The same laboratory test should be used to record information in LDH Upper Limits of Normal [NAACCR Data Item # 3870]