ICD-9-CM Official Guidelines for Coding and Reporting

The Centers for Medicare and Medicaid Services (CMS) formerly the Health Care Financing Administration (HCFA) and the National Center for Health Statistics (NCHS), two departments within the Department of Health and Human Services (DHHS) present the following guidelines for coding and reporting using the International Classification of Diseases, 9th Revision, Clinical Modification (ICD-9-CM). These guidelines should be used as a companion document to the official versions of the ICD-9-CM as published on CD-ROM. These guidelines for coding and reporting have been developed and approved by the Cooperating Parties for ICD-9-CM: the American Hospital Association, the American Health Information Management...

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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 presents the official ICD-9-CM coding and reporting guidelines issued by CMS, NCHS, and cooperating organizations. It explains the structure of the guidelines, the general conventions for ICD-9-CM, and chapter-specific guidance across major clinical areas, along with inpatient, additional-diagnosis, and outpatient reporting rules. It is intended for coders, billers, auditors, and health information professionals who need to understand the scope and organization of ICD-9-CM guidance and related reporting expectations.

Why This Topic Matters

The page matters because it describes the official framework used to interpret and apply ICD-9-CM reporting guidance across settings. It is useful for anyone needing to understand how the guideline document is organized and what broad topics and code groups it addresses before consulting the full premium content.

Article Sections

  1. Section I. ICD-9-CM Conventions, General Coding Guidelines and Chapter-Specific Guidelines

    Introduces the ICD-9-CM conventions, broad coding principles, and chapter-specific guidance used throughout the classification. It also organizes disease- and condition-specific guidance by major chapter areas.

  2. Section II. Selection of Principal Diagnosis(es) for Inpatient, Short-term, Acute Care Hospital Records

    Covers inpatient principal diagnosis selection and the circumstances that affect sequencing in acute care hospital records. It addresses general inpatient decision points and special situations.

  3. Section III. Reporting Additional Diagnoses

    Explains how additional diagnoses are identified and reported in inpatient records. It outlines the general criteria used to determine whether a condition should be coded beyond the primary diagnosis.

  4. Section IV. Diagnostic Coding and Reporting Guidelines for Outpatient Services

    Describes outpatient and physician reporting guidance, including first-listed condition selection and general outpatient sequencing concepts. It also summarizes differences between outpatient and inpatient reporting.

What You Will Learn

  • How the ICD-9-CM guideline document is structured
  • What the general ICD-9-CM conventions cover
  • How major chapter-specific guideline areas are organized
  • How inpatient principal diagnosis selection is approached at a high level
  • How additional diagnoses are defined and reported
  • How outpatient first-listed diagnosis guidance differs from inpatient guidance

Who Should Read This

  • Medical coders
  • Coding auditors
  • Health information management professionals
  • Billing staff
  • Physician office coding staff
  • Hospital outpatient and inpatient coding teams

Codes Discussed

  • ICD-9-CM: 042
  • ICD-9-CM: V08
  • ICD-9-CM: 795.71
  • ICD-9-CM: 647.6X
  • ICD-9-CM: V73.89
  • ICD-9-CM: V69.8
  • ICD-9-CM: V65.44
  • ICD-9-CM: 650
  • ICD-9-CM: V27.0
  • ICD-9-CM: V24.0
  • ICD-9-CM: 644.21
  • ICD-9-CM: 796.2
  • ICD-9-CM: 362.11
  • ICD-9-CM: 585
  • ICD-9-CM: 401
  • ICD-9-CM: 402
  • ICD-9-CM: 403
  • ICD-9-CM: 404
  • ICD-9-CM: 405
  • ICD-9-CM: 430
  • ICD-9-CM: 438
  • ICD-9-CM: 630
  • ICD-9-CM: 639
  • ICD-9-CM: 655
  • ICD-9-CM: 656
  • ICD-9-CM: 642.3x
  • ICD-9-CM: 677
  • ICD-9-CM: 634
  • ICD-9-CM: 637
  • ICD-9-CM: 640
  • ICD-9-CM: 648
  • ICD-9-CM: 651
  • ICD-9-CM: 676
  • ICD-9-CM: 740
  • ICD-9-CM: 759
  • ICD-9-CM: 760
  • ICD-9-CM: 779
  • ICD-9-CM: 764
  • ICD-9-CM: 765
  • ICD-9-CM: 780.0
  • ICD-9-CM: 799.9
  • ICD-9-CM: 001.0
  • ICD-9-CM: 999.9
  • ICD-9-CM: 906.5
  • ICD-9-CM: 906.9
  • ICD-9-CM: 905
  • ICD-9-CM: 909
  • ICD-9-CM: 958.3
  • ICD-9-CM: 86.22
  • ICD-9-CM: 86.28
  • ICD-9-CM: 630-639
  • ICD-9-CM: 640-648
  • ICD-9-CM: 651-676
  • ICD-9-CM: 634-637
  • ICD-9-CM: 634-638
  • ICD-9-CM: 660-669
  • ICD-9-CM: 800-829
  • ICD-9-CM: 940-948
  • ICD-9-CM: 940-947
  • ICD-9-CM: 946
  • ICD-9-CM: 948
  • ICD-9-CM: 949
  • ICD-9-CM: 950-957
  • ICD-9-CM: 900-904
  • ICD-9-CM: 960-979
  • ICD-9-CM: 630-677
  • ICD-9-CM: V22.2
  • ICD-9-CM: V23
  • ICD-9-CM: V27.0-V27.9
  • ICD-9-CM: V22.0
  • ICD-9-CM: V22.1
  • ICD-9-CM: V29
  • ICD-9-CM: V30-V39
  • ICD-9-CM: V71.0
  • ICD-9-CM: V71.9
  • ICD-9-CM: V10-V19
  • ICD-9-CM: V01.0
  • ICD-9-CM: V83.02
  • ICD-9-CM: E849.9
  • ICD-9-CM: E929
  • ICD-9-CM: E959
  • ICD-9-CM: E969
  • ICD-9-CM: E977
  • ICD-9-CM: E989
  • ICD-9-CM: E999
  • ICD-9-CM: E960
  • ICD-9-CM: E968
  • ICD-9-CM: E967
  • ICD-9-CM: E904.0
  • ICD-9-CM: E980
  • ICD-9-CM: E928.9
  • ICD-9-CM: E958.9
  • ICD-9-CM: E968.9
  • ICD-9-CM: V58.0
  • ICD-9-CM: V58.1
  • ICD-9-CM: V58.11
  • ICD-9-CM: V58.12
  • ICD-9-CM: V72.8
  • ICD-9-CM: 001- V83.02
  • ICD-9-CM: 780.0 - 799.9

Code Ranges Discussed

  • ICD-9-CM: V71.0-V71.9
  • ICD-9-CM: V27.0-V27.9
  • ICD-9-CM: 630-639
  • ICD-9-CM: 640-648
  • ICD-9-CM: 651-676
  • ICD-9-CM: 634-637
  • ICD-9-CM: 634-638
  • ICD-9-CM: 660-669
  • ICD-9-CM: 800-829
  • ICD-9-CM: 940-948
  • ICD-9-CM: 940-947
  • ICD-9-CM: 950-957
  • ICD-9-CM: 900-904
  • ICD-9-CM: 960-979
  • ICD-9-CM: 630-677
  • ICD-9-CM: V10-V19
  • ICD-9-CM: V01.0-V83.02
  • ICD-9-CM: 001.0 through V83.02
  • ICD-9-CM: 780.0 - 799.9

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