---
title: "[MI/URSA-CORE] CMS GEM ICD-9-CM Diagnosis Codes and ICD-10-CM Codes"
slug: "mi-ursa-core-cms-gem-icd-9-cm-diagnosis-codes-and-icd-10-cm-codes"
updated: 2026-11-04T20:15:31Z
published: 2026-11-04T20:15:31Z
canonical: "docs.ursahealth.com/mi-ursa-core-cms-gem-icd-9-cm-diagnosis-codes-and-icd-10-cm-codes"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ursahealth.com/llms.txt
> Use this file to discover all available pages before exploring further.

# [MI/URSA-CORE] CMS GEM ICD-9-CM Diagnosis Codes and ICD-10-CM Codes

## Object Description

One record per General Equivalence Mapping (GEM) for ICD-9-CM and ICD-10-CM diagnosis codes.

The sources for this object are CMS ICD-10-CM codes and CMS ICD-9-CM Diagnosis and Procedure Codes.

Ursa Studio Update Cadence: Annually

## Metadata

- **Table Name**: ursa.mi_ursa_core_121
- **Layer**: METADATA_AND_INTEGRATION
- **Object Type**: Ursa Reference
- **Temporal Class**: Entity
- **Case ID**: ICD-9-CM Code, ICD-10-CM Code
- **Primary Key**: ICD-9-CM Code, ICD-10-CM Code

## Published Fields

- **[No Field Group]**
  - ICD-9-CM Code
  - ICD-10-CM Code
  - Is Approximate Match
  - ICD-10-CM Rank Within ICD-9-CM
  - ICD-9-CM Rank Within ICD-10-CM