Is ICD-10-CM code M84 billable?

No, M84 (Disorder of continuity of bone) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code M84 belong to?

M84 belongs to Chapter 13 of the ICD-10-CM tabular list: M00–M99 (Diseases of the Musculoskeletal System and Connective Tissue).

M84Not billable, use a more specific code below

Disorder of continuity of bone

In Disorders of bone density and structure (M80-M85), chapter 13: Diseases of the Musculoskeletal System and Connective Tissue

928 billable codes under M84: 412 are a CC; 18 map to HCC 402 (Hip Fracture/Dislocation).A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment. An HCC counts toward a Medicare Advantage patient's risk score.

Instructional notes

Excludes2: not included here, code separately if applicable

traumatic fracture of bone-see fracture, by site

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Covers site and laterality, acute injury versus chronic musculoskeletal conditions, 7th characters for pathologic fractures, osteoporosis with or without current fracture, and multisystem inflammatory syndrome.

Site and laterality (page 60)
Acute traumatic versus chronic or recurrent musculoskeletal conditions (page 61)
Coding of Pathologic Fractures (page 61)
Osteoporosis (page 61)
Multisystem Inflammatory Syndrome (page 62)

Read Section I.C.13 (page 60)

Codes under M84

M84 can't be used on a claim. Pick a billable code below; grey headings group them.

M84 MS-DRGs

As the principal diagnosis, the billable codes under M84 group to these 18 MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

DRG 559 Aftercare, Musculoskeletal System and Connective Tissue with MCC (445 of 928 codes)
DRG 560 Aftercare, Musculoskeletal System and Connective Tissue with CC (445 of 928 codes)
DRG 561 Aftercare, Musculoskeletal System and Connective Tissue without CC/MCC (445 of 928 codes)
DRG 564 Other Musculoskeletal System and Connective Tissue Diagnoses with MCC (328 of 928 codes)
DRG 565 Other Musculoskeletal System and Connective Tissue Diagnoses with CC (328 of 928 codes)
DRG 566 Other Musculoskeletal System and Connective Tissue Diagnoses without CC/MCC (328 of 928 codes)
DRG 542 Pathological Fractures and Musculoskeletal and Connective Tissue Malignancy with MCC (150 of 928 codes)
DRG 543 Pathological Fractures and Musculoskeletal and Connective Tissue Malignancy with CC (150 of 928 codes)
DRG 544 Pathological Fractures and Musculoskeletal and Connective Tissue Malignancy without CC/MCC (150 of 928 codes)
DRG 791 Prematurity with Major Problems (112 of 928 codes)
DRG 793 Full Term Neonate with Major Problems (112 of 928 codes)
DRG 521 Hip Replacement with Principal Diagnosis of Hip Fracture with MCC (88 of 928 codes)
DRG 522 Hip Replacement with Principal Diagnosis of Hip Fracture without MCC (88 of 928 codes)
DRG 551 Medical Back Problems with MCC (5 of 928 codes)
DRG 552 Medical Back Problems without MCC (5 of 928 codes)
DRG 456 Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, or Infection with MCC (2 of 928 codes)
DRG 457 Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, or Infection with CC (2 of 928 codes)
DRG 458 Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, or Infection without CC/MCC (2 of 928 codes)

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

Bone Diseases

Your bones help you move, give you shape and support your body. They are living tissues that rebuild constantly throughout your life. During childhood and your teens, your body adds new bone faster than it removes old bone. After about age 20, you can lose bone faster than you make bone. To have strong bones when you are young, and to prevent bone loss when you are older, you need to get enough calcium, vitamin D, and exercise. You should also avoid smoking and drinking too much alcohol.

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.