2027 ICD-10-CM Diagnosis Code M84.345DStress fracture, left finger(s), subsequent encounter for fracture with routine healing

ICD-10-CM Codes›M00–M99›M80-M85›M84

ICD-10-CM M84.345D
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

M84.345D is a billable ICD-10-CM diagnosis code for stress fracture, left finger(s), subsequent encounter for fracture with routine healing. The 7th character D means subsequent encounter for fracture with routine healing, used during routine care in the healing or recovery phase. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 559 through 561. Coders also document this condition as stress fracture of finger of left hand. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Stress fracture, subsequent encounter.

Code Identity

ICD-10-CM Code
M84.345D
Billable Status
Yes — Valid for Submission
Code Describes
Stress fracture, left finger(s), subsequent encounter for fracture with routine healing
Short Description
Stress fracture, left finger(s), subs for fx w routn heal
Parent Code
M84.345
Stress fracture, left finger(s)

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM80-M85Disorders of bone density and structure
CategoryM84Disorder of continuity of bone
This CodeM84.345DStress fracture, left finger(s), subsequent encounter for fracture with routine healing

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Stress fracture of finger of left hand
  • Stress fracture of hand
  • Stress fracture of left hand

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to M84.345D: its own notes plus those printed at M84.3, M84, 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 M84.3 Stress fracture applies to 228 codes

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 M84.3 Stress fracture applies to 228 codes
  • personal history of (healed) stress (fatigue) fracture (Z87.312)
  • stress fracture of vertebra (M48.4-)
From M84 Disorder of continuity of bone applies to 928 codes
  • traumatic fracture of bone-see fracture, by site
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)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From M84.3 Stress fracture applies to 228 codes
  • external cause code(s) to identify the cause of the stress fracture

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

7th Character

Every code in the category takes a 7th character from the listed values, with the placeholder X filling any empty positions before it.

From M84.3 Stress fracture applies to 228 codes
  • The appropriate 7th character is to be added to each code from subcategory M84.3:
Values for category M84.3 Pathological Fracture Encounter
  • Ainitial encounter for fracture
  • Dsubsequent encounter for fracture with routine healing this code
  • Gsubsequent encounter for fracture with delayed healing
  • Ksubsequent encounter for fracture with nonunion
  • Psubsequent encounter for fracture with malunion
  • Ssequela

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

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name M84.345D, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming M84.345D: they are not reported together with it, unless the two conditions are unrelated.

  • M84.4 Pathological fracture, not elsewhere classified
    stress fracture (M84.3-) names M84.3-, which includes this code

Clinical ClassificationClinical

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

CCSR MUS017
Stress fracture, subsequent encounter
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Fractures, Stress

    fractures due to the strain caused by repetitive exercise. they are thought to arise from a combination of muscle fatigue and bone failure, and occur in situations where bone remodeling predominates over repair. the most common sites of stress fractures are the metatarsus; fibula; tibia; and femoral neck.

Patient EducationClinical

Finger Injuries and Disorders

You use your fingers and thumbs to do everything from grasping objects to playing musical instruments to typing. When there is something wrong with them, it can make life difficult. Common problems include:

Read the full article at MedlinePlus

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

Convert M84.345D to ICD-9-CMHistory

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

ICD-9-CM
V54.22 Aftrcare path fx low arm
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 M84.345DOverview

Is M84.345D (Stress fracture, left finger(s)) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report stress fracture, left finger(s), subsequent encounter for fracture with routine healing on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What does the 7th character D in M84.345D mean?

The final character D marks a subsequent encounter: use it for routine care while the stress fracture, left finger(s) is healing, after active treatment has ended. In this category the CMS Tabular List defines D as "subsequent encounter for fracture with routine healing".

What MS-DRG does M84.345D group to?

When stress fracture, left finger(s), subsequent encounter for fracture with routine healing is the principal diagnosis on an inpatient stay, it groups to MS-DRG 559, 561, 560, with relative weights from 0.8258 to 1.8087 depending on complications. Higher weights mean higher Medicare reimbursement.

Can M84.345D be reported with a code from M84.4?

Not as a rule. The Excludes1 note at M84.3, which applies to M84.345D, lists "pathological fracture NOS (M84.4.-)". 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).

Does M84.345D need an additional code?

When the condition applies, yes. The Use Additional Code note at M84.3, which applies to M84.345D, reads: external cause code(s) to identify the cause of the stress fracture. The additional code is reported after M84.345D.