ICD-10-CM 2027 diagnosis code
R07.9Chest pain, unspecified
R07.9 is a valid, billable ICD-10-CM code for chest pain, unspecified. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.
Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS, effective October 1, 2026. Updated September 29, 2026. About our data
About R07.9
R07.9 is the ICD-10-CM diagnosis code for chest pain, unspecified. It belongs to category R07 (pain in throat and chest), block R00-R09 (symptoms and signs involving the circulatory and respiratory systems) and chapter 18 (symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
Within R07, choose R07.9 (Chest pain, unspecified) only when documentation doesn't support a more specific option: pain in throat (R07.0), chest pain on breathing (R07.1), Precordial pain (R07.2) and other chest pain (R07.8).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 313 (Chest Pain, relative weight 0.7114), in MDC 05 (Diseases and Disorders of the Circulatory System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Before ICD-10, this condition was coded in ICD-9-CM as 786.50 (chest pain, unspecified).
Notes that apply from higher levels
Instructions written at a parent level also apply to R07.9.
› From R07 Pain in throat and chest
Broader instructions also apply from Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified.
Alphabetic index entries
1 entriesTerms in the official ICD-10-CM index that lead to R07.9.
Codes whose notes reference R07.9
MS-DRG v44.0 grouping
All DRGs →Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.
MDC 05 · Diseases and Disorders of the Circulatory System
ICD-9-CM equivalent
Converter →- 786.50Chest pain, unspecifiedexact
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about R07.9
Is R07.9 billable?
- Yes. R07.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R07.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R07.9 as a principal diagnosis.
Is R07.9 a CC or MCC?
- No. R07.9 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does R07.9 group to?
- R07.9 is used in the MS-DRG v44.0 logic for MS-DRG 313 (Chest Pain). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.
What is the ICD-9 code for R07.9?
- The CMS General Equivalence Mappings map R07.9 to ICD-9-CM 786.50.