2027 ICD-10-CM Diagnosis Code M84.529GPathological fracture in neoplastic disease, unspecified humerus, subsequent encounter for fracture with delayed healing

ICD-10-CM Codes›M00–M99›M80-M85›M84

ICD-10-CM M84.529G
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

M84.529G is a billable ICD-10-CM diagnosis code for pathological fracture in neoplastic disease, unspecified humerus, subsequent encounter for fracture with delayed healing. The 7th character G means subsequent encounter for fracture with delayed healing. 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 pathologic fracture of humerus at site of neoplasm. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Pathological fracture, subsequent encounter.

Code Identity

ICD-10-CM Code
M84.529G
Billable Status
Yes — Valid for Submission
Code Describes
Pathological fracture in neoplastic disease, unspecified humerus, subsequent encounter for fracture with delayed healing
Short Description
Path fx in neopltc dis, unsp humer, subs for fx w delay heal
Parent Code
M84.529
Pathological fracture in neoplastic disease, unspecified humerus

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM80-M85Disorders of bone density and structure
CategoryM84Disorder of continuity of bone
This CodeM84.529GPathological fracture in neoplastic disease, unspecified humerus, subsequent encounter for fracture with delayed healing

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Pathologic fracture of humerus at site of neoplasm
  • Pathological fracture - upper arm

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to M84.529G: its own notes plus those printed at M84.5, M84, and Chapter 13. A note printed at a category, block or chapter applies to every code under it.

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 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)

Code Also

A second code may be needed to fully describe the condition; the note gives no sequencing direction.

From M84.5 Pathological fracture in neoplastic disease applies to 192 codes
  • underlying neoplasm

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 M84.5 Pathological fracture in neoplastic disease applies to 192 codes
  • The appropriate 7th character is to be added to each code from subcategory M84.5:
Values for category M84.5 Pathological Fracture Encounter
  • Ainitial encounter for fracture
  • Dsubsequent encounter for fracture with routine healing
  • Gsubsequent encounter for fracture with delayed healing this code
  • 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 M84.529G, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming M84.529G: they are not reported together with it, unless the two conditions are unrelated.

  • M84.4 Pathological fracture, not elsewhere classified
    pathological fracture in neoplastic disease (M84.5-) names M84.5-, which includes this code

Clinical ClassificationClinical

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

CCSR MUS015
Pathological fracture, subsequent encounter
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Arm Injuries and Disorders

Of the 206 bones in your body, three of them are in your arm: the humerus, radius, and ulna. Your arms are also made up of muscles, joints, tendons, and other connective tissue. Injuries to any of these parts of the arm can occur during sports, a fall, or an accident.

Read the full article at MedlinePlus

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

Convert M84.529G to ICD-9-CMHistory

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

ICD-9-CM
V54.21 Aftercare path fx up 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 M84.529GOverview

Is M84.529G a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report pathological fracture in neoplastic disease, unspecified humerus, subsequent encounter for fracture with delayed healing on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What does the 7th character G in M84.529G mean?

The final character G reports a subsequent encounter where the pathological fracture in neoplastic disease, unspecified humerus is healing more slowly than expected. In this category the CMS Tabular List defines G as "subsequent encounter for fracture with delayed healing".

What MS-DRG does M84.529G group to?

When pathological fracture in neoplastic disease, unspecified humerus, subsequent encounter for fracture with delayed 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.

What is the ICD-9 equivalent of M84.529G?

Under the General Equivalence Mappings, pathological fracture in neoplastic disease, unspecified humerus, subsequent encounter for fracture with delayed healing converts to ICD-9-CM V54.21 (aftercare path fx up arm). The mapping is approximate, so confirm the match fits the documentation.