Primary Diagnoses Public Use File - Minnesota Dept. of Health

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Primary Diagnoses Public Use File

This file is designed to analyze the distribution of diagnostic information recorded in health care use for Minnesota residents. It presents the data in summarized form by age group and 3-digit ZIP code. Diagnostic information stems from the primary diagnoses on the medical claim following the Clinical Modification of International Classification of Diseases, Ninth Revision (ICD-CM-9). It is summarized at the 3-digit level where it describes disease type or organ system.

  • For example, this file permits identifying that in 2013, there were 13,863 diagnoses for Streptococcal sore throat and scarlet fever (ICD-9-CM 034) among children and youth under the age of 18 in West Minneapolis (Zip Code 553), and that the combined spending for patient care related to the diagnoses was about $2 million.

Where the combination of geography, age group and primary diagnosis created cells describing fewer than 11 individuals, the data were rolled up to higher levels of aggregation, consistent with federal data use requirement. In this process, redaction of data occurred first at the geography level and then age grouping.  If the rolled up records still described fewer than 11 individuals, they were removed entirely.

Additional redaction occurred, consistent with legislatively established guard rails to prevent identification of providers or health insurance carriers. Generally, records representing fewer than 20 health care providers or fewer than four payers were removed.

Descriptions of the ICD-9 codes are not provided in this file. Code references may be obtained at
CDC Classification of Diseases, Functioning, and Disability (

For example analyses based on diagnostic information, please review MDH’s recently published study on chronic disease in Minnesota:

Chronic Conditions in Minnesota: New Estimates of Prevalence, Cost and Geographic Variation for Insured Minnesotans, 2012 (PDF)

Updated Tuesday, October 24, 2017 at 10:48AM