2027 ICD-10-CM Diagnosis Code M79.671Pain in right foot

ICD-10-CM Codes›M00–M99›M70-M79›M79

ICD-10-CM M79.671
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

M79.671 is a billable ICD-10-CM diagnosis code for pain in right foot. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 555 through 556. Coders also document this condition as bilateral chronic pain of feet. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Musculoskeletal pain, not low back pain.

This medical diagnosis code is frequently used in Family Practice, Internal Medicine, and Pediatrics medical specialties to designate conditions such pain in limb.

Code Identity

ICD-10-CM Code
M79.671
Billable Status
Yes — Valid for Submission
Code Describes
Pain in right foot
Short Description
Pain in right foot
Same as the full description in the CMS dataset.
Parent Code
Pain in foot and toes

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM70-M79Other soft tissue disorders
CategoryM79Other and unspecified soft tissue disorders, not elsewhere classified
This CodeM79.671Pain in right foot

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Bilateral chronic pain of feet
  • Bilateral heel pain
  • Chronic pain of left foot
  • Chronic pain of right foot
  • Heel pain
  • Pain in bilateral feet
  • Pain in right foot
  • Pain of left heel
  • Pain of right heel

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to M79.671: its own notes plus those printed at M79.6, M79, and Chapter 13. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From M79 Other and unspecified soft tissue disorders, not elsewhere classified applies to 52 codes
  • psychogenic rheumatism (F45.8)
  • soft tissue pain, psychogenic (F45.41)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From M79.6 Pain in limb, hand, foot, fingers and toes applies to 31 codes
From Chapter 13 (M00-M99) Diseases of the musculoskeletal system and connective tissue applies to 6,687 codes
  • arthropathic psoriasis (L40.5-)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • compartment syndrome (traumatic) (T79.A-)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Notes

General instructions on how these codes are used.

From Chapter 13 (M00-M99) Diseases of the musculoskeletal system and connective tissue applies to 6,687 codes
  • Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name M79.671, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming M79.671: they are not reported together with it, unless the two conditions are unrelated.

  • R52 Pain, unspecified
    limb pain (M79.6-) names M79.6-, which includes this code

Excludes2 5

These codes carry an Excludes2 note naming M79.671: its condition is not part of those codes, and both may be reported when the patient has both.

  • G89 Pain, not elsewhere classified
    limb pain (M79.6-) names M79.6-, which includes this code
  • M25.5 Pain in joint
    pain in foot (M79.67-) names M79.67-, which includes this code
  • M25.5 Pain in joint
    pain in limb (M79.6-) names M79.6-, which includes this code
  • M25.5 Pain in joint
    pain in toes (M79.67-) names M79.67-, which includes this code
  • R29.89 Other symptoms and signs involving the musculoskeletal system
    pain in limb (M79.6-) names M79.6-, which includes this code

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR MUS010
Musculoskeletal pain, not low back pain
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Foot Injuries and Disorders

Each of your feet has 26 bones, 33 joints, and more than 100 tendons, muscles, and ligaments. No wonder a lot of things can go wrong. Here are a few common problems:

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert M79.671 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
729.5 Pain in limb
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About M79.671Overview

What is the ICD-10 code for pain in right foot?

The ICD-10-CM code for pain in right foot is M79.671 (sometimes written as M79671). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is M79.671 (Pain in foot and toes) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report pain in right foot on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does M79.671 group to?

When pain in right foot is the principal diagnosis on an inpatient stay, it groups to MS-DRG 555, 556, with relative weights from 0.8210 to 1.2908 depending on complications. Higher weights mean higher Medicare reimbursement.

Can M79.671 be reported with F45.8?

Not as a rule. The Excludes1 note at M79, which applies to M79.671, lists "psychogenic rheumatism (F45.8)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

What is the ICD-9 equivalent of M79.671?

Under the General Equivalence Mappings, pain in right foot converts to ICD-9-CM 729.5 (pain in limb). The mapping is approximate, so confirm the match fits the documentation.