Conversion Table of New ICD-9-CM Codes

The National Center for Health Statistics (NCHS) and the Health Care Financing Administration (HCFA) have issued new diagnosis and procedure codes for the International Classification of Diseases, 9th Revision, Clinical Modification (ICD-9-CM) every year since 1986. New code assignments are the result of year-long efforts of the ICD-9-CM Coordination and Maintenance Committee, which is sponsored jointly by NCHS and HCFA. The effective date for new codes is the same every year, October 1. The Conversion Table for new ICD-9-CM Codes is provided to assist users in data retrieval. For each new code the table shows the date it became...

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Note:  The following article synopsis was NOT provided by the AHA. It was created by Find-A-Code/innoviHealth.

Article Overview

This article is a historical conversion table for ICD-9-CM diagnosis and procedure code updates issued over time by NCHS and HCFA. It is intended for coders, auditors, and data retrieval users who need to understand how new code assignments relate to previously used codes and revision years. The article covers broad ICD-9-CM conversion patterns, effective dates, and code reassignments across diagnosis and procedure sections.

Why This Topic Matters

It helps readers interpret older records, maintain consistent reporting, and align historical data with the ICD-9-CM version in effect at the time of service or reporting.

Article Sections

  1. Diagnosis Codes

    Lists diagnosis code changes in a conversion-table format, including effective dates and prior-code crosswalks. The section spans multiple ICD-9-CM revision years and includes notes on deleted or retitled codes.

  2. Procedure Codes

    Lists procedure code changes in a similar conversion-table format with effective dates and previous-code equivalents. The section includes revision-year changes and notes related to deleted, retitled, or reorganized procedure entries.

What You Will Learn

  • How the article organizes ICD-9-CM diagnosis and procedure code updates
  • What kinds of historical code crosswalk information are included
  • Which revision years are represented in the table
  • How the article distinguishes diagnosis code changes from procedure code changes

Who Should Read This

  • Medical coders
  • Coding auditors
  • Health information management professionals
  • Clinical documentation and data retrieval users
  • Researchers working with historical ICD-9-CM data

Codes Discussed

  • ICD-9-CM: 005.81
  • ICD-9-CM: 005.89
  • ICD-9-CM: 007.4
  • ICD-9-CM: 031.2
  • ICD-9-CM: 041.04#
  • ICD-9-CM: 042
  • ICD-9-CM: 079.6
  • ICD-9-CM: 088.82
  • ICD-9-CM: 291.81
  • ICD-9-CM: 337.3
  • ICD-9-CM: 414.04-414.05
  • ICD-9-CM: V26.51
  • ICD-9-CM: E967.3
  • ICD-9-CM: 02.96
  • ICD-9-CM: 37.70
  • ICD-9-CM: 78.90*
  • ICD-9-CM: 99.71-99.79**

Code Ranges Discussed

  • ICD-9-CM: 008.00-008.09
  • ICD-9-CM: 008.43-008.47
  • ICD-9-CM: 008.61-008.69
  • ICD-9-CM: 038.10-038.11
  • ICD-9-CM: 041.00-041.03
  • ICD-9-CM: 041.10-041.19
  • ICD-9-CM: 041.81-041.85
  • ICD-9-CM: 042.0-042.9
  • ICD-9-CM: 043.0-043.9
  • ICD-9-CM: 044.0-044.9
  • ICD-9-CM: 070.20-070.21
  • ICD-9-CM: 070.30-070.31
  • ICD-9-CM: 070.41-070.43
  • ICD-9-CM: 070.51-070.53
  • ICD-9-CM: 077.98-077.99
  • ICD-9-CM: 078.10-078.11, 078.19
  • ICD-9-CM: 079.50-079.53, 079.59
  • ICD-9-CM: 099.40-099.49
  • ICD-9-CM: 099.50-099.59
  • ICD-9-CM: 112.84-112.85
  • ICD-9-CM: 114.4-114.5
  • ICD-9-CM: 176.0-176.9
  • ICD-9-CM: 203.00
  • ICD-9-CM: 203.10
  • ICD-9-CM: 203.80
  • ICD-9-CM: 204.00
  • ICD-9-CM: 204.10
  • ICD-9-CM: 204.20
  • ICD-9-CM: 204.80
  • ICD-9-CM: 204.90
  • ICD-9-CM: 205.00
  • ICD-9-CM: 205.10
  • ICD-9-CM: 205.20
  • ICD-9-CM: 205.30
  • ICD-9-CM: 205.80
  • ICD-9-CM: 205.90
  • ICD-9-CM: 206.00
  • ICD-9-CM: 206.10
  • ICD-9-CM: 206.20
  • ICD-9-CM: 206.80
  • ICD-9-CM: 206.90
  • ICD-9-CM: 207.00
  • ICD-9-CM: 207.10
  • ICD-9-CM: 207.20
  • ICD-9-CM: 207.80
  • ICD-9-CM: 208.00
  • ICD-9-CM: 208.10
  • ICD-9-CM: 208.20
  • ICD-9-CM: 208.80
  • ICD-9-CM: 208.90

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