ICD-10-CM Code For Disorder Of Continuity Of Bone: Group Overview

The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group M84 includes disorders of bone continuity such as nonunion, delayed union, and pathological fractures that reflect impaired or abnormal bone healing and structural integrity. These ICD-10-CM diagnosis codes are used to document clinical scenarios involving failed or impaired fracture healing, fractures due to underlying bone pathology, and complications that affect treatment planning and resource use. Accurate coding within the ICD-10-CM M84 group supports proper claim adjudication and complete clinical documentation and appropriate reimbursement.

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ICD-10-CM M84: Disorder Of Continuity Of Bone Overview

The diagnoses in the ICD-10-CM M84 group represent disorders characterized by impaired continuity of bone, including nonunion, delayed union, and pathological fractures. These conditions affect the musculoskeletal system and often result from trauma, metabolic bone disease, or infection. Accurate coding ensures clinical records reflect healing status and complication presence, which impacts reimbursement and care coordination.

When to Use

Use a code from this group when documentation indicates impaired or failed fracture healing such as nonunion or delayed union, or when a fracture occurs because of an underlying bone disease. Select the code that reflects the precise diagnosis, anatomical location, and any specified laterality as recorded in the clinical record.

ICD-10-CM Codes

928 rows

ICD-10-CM Code	Description
M84.30XA	Stress fracture, unspecified site, initial encounter for fracture
M84.30XD	Stress fracture, unspecified site, subsequent encounter for fracture with routine healing
M84.30XG	Stress fracture, unspecified site, subsequent encounter for fracture with delayed healing
M84.30XK	Stress fracture, unspecified site, subsequent encounter for fracture with nonunion
M84.30XP	Stress fracture, unspecified site, subsequent encounter for fracture with malunion
M84.30XS	Stress fracture, unspecified site, sequela
M84.311A	Stress fracture, right shoulder, initial encounter for fracture
M84.311D	Stress fracture, right shoulder, subsequent encounter for fracture with routine healing
M84.311G	Stress fracture, right shoulder, subsequent encounter for fracture with delayed healing
M84.311K	Stress fracture, right shoulder, subsequent encounter for fracture with nonunion
M84.311P	Stress fracture, right shoulder, subsequent encounter for fracture with malunion
M84.311S	Stress fracture, right shoulder, sequela
M84.312A	Stress fracture, left shoulder, initial encounter for fracture
M84.312D	Stress fracture, left shoulder, subsequent encounter for fracture with routine healing
M84.312G	Stress fracture, left shoulder, subsequent encounter for fracture with delayed healing
M84.312K	Stress fracture, left shoulder, subsequent encounter for fracture with nonunion
M84.312P	Stress fracture, left shoulder, subsequent encounter for fracture with malunion
M84.312S	Stress fracture, left shoulder, sequela
M84.319A	Stress fracture, unspecified shoulder, initial encounter for fracture
M84.319D	Stress fracture, unspecified shoulder, subsequent encounter for fracture with routine healing

Showing 1–20 of 928

DRG Codes

18 rows

DRG Code	Description
456	Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, Infection or Extensive Fusions with MCC
457	Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, Infection or Extensive Fusions with CC
458	Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, Infection or Extensive Fusions without CC/MCC
521	Hip Replacement with Principal Diagnosis of Hip Fracture with MCC
522	Hip Replacement with Principal Diagnosis of Hip Fracture without MCC
542	Pathological Fractures and Musculoskeletal and Connective Tissue Malignancy with MCC
543	Pathological Fractures and Musculoskeletal and Connective Tissue Malignancy with CC
544	Pathological Fractures and Musculoskeletal and Connective Tissue Malignancy without CC/MCC
551	Medical Back Problems with MCC
552	Medical Back Problems without MCC
559	Aftercare, Musculoskeletal System and Connective Tissue with MCC
560	Aftercare, Musculoskeletal System and Connective Tissue with CC
561	Aftercare, Musculoskeletal System and Connective Tissue without CC/MCC
564	Other Musculoskeletal System and Connective Tissue Diagnoses with MCC
565	Other Musculoskeletal System and Connective Tissue Diagnoses with CC
566	Other Musculoskeletal System and Connective Tissue Diagnoses without CC/MCC
791	Prematurity with Major Problems
793	Full Term Neonate with Major Problems

Typical Clinical Scenarios

An older adult presents to the emergency department after a ground-level fall with acute localized pain and inability to bear weight on the proximal femur. Imaging demonstrates a nondisplaced insufficiency fracture through osteoporotic bone of the femoral neck without open wound; this is an acute encounter for initial treatment of a pathologic/insufficiency fracture due to weakened bone. Typical codes: M84.341A, M84.342A
A middle-aged patient with long-standing corticosteroid therapy for autoimmune disease reports progressive forearm pain and imaging shows stress fractures of the radius with delayed healing over several months; the patient is seen in clinic for ongoing management and monitoring of fracture healing. This represents a subsequent encounter for fracture with delayed healing of a bone weakened by systemic metabolic causes, and a code from the group is assigned to capture the continuity disorder and encounter status. Typical codes: M84.331D, M84.332D
A pediatric patient with a congenital metabolic bone disorder is admitted for planned orthopedic stabilization due to recurrent pathologic fractures of the tibia; multiple old and new cortical disruptions are documented and care includes operative fixation and perioperative management. Coding reflects a disorder of bone continuity related to underlying bone disease and the inpatient encounter for operative treatment of the fracture(s). Typical codes: M84.319K, M84.321K

ICD-10-CM Code For Osteoporosis With Current Pathological Fracture: Group Overview

M81-OSTEOPOROSIS-WITHOUT-FRACTURE

ICD-10-CM Code For Osteoporosis Without Current Pathological Fracture: Group Overview

M83-ADULT-OSTEOMALACIA

ICD-10-CM Code For Adult Osteomalacia: Group Overview

M85-OTHER-BONE-DENSITY-DISORDERS

ICD-10-CM Code For Other Disorders Of Bone Density And Structure: Group Overview

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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When to Use

ICD-10-CM Codes

928 rows

ICD-10-CM Code	Description
M84.30XA	Stress fracture, unspecified site, initial encounter for fracture
M84.30XD	Stress fracture, unspecified site, subsequent encounter for fracture with routine healing
M84.30XG	Stress fracture, unspecified site, subsequent encounter for fracture with delayed healing
M84.30XK	Stress fracture, unspecified site, subsequent encounter for fracture with nonunion
M84.30XP	Stress fracture, unspecified site, subsequent encounter for fracture with malunion
M84.30XS	Stress fracture, unspecified site, sequela
M84.311A	Stress fracture, right shoulder, initial encounter for fracture
M84.311D	Stress fracture, right shoulder, subsequent encounter for fracture with routine healing
M84.311G	Stress fracture, right shoulder, subsequent encounter for fracture with delayed healing
M84.311K	Stress fracture, right shoulder, subsequent encounter for fracture with nonunion
M84.311P	Stress fracture, right shoulder, subsequent encounter for fracture with malunion
M84.311S	Stress fracture, right shoulder, sequela
M84.312A	Stress fracture, left shoulder, initial encounter for fracture
M84.312D	Stress fracture, left shoulder, subsequent encounter for fracture with routine healing
M84.312G	Stress fracture, left shoulder, subsequent encounter for fracture with delayed healing
M84.312K	Stress fracture, left shoulder, subsequent encounter for fracture with nonunion
M84.312P	Stress fracture, left shoulder, subsequent encounter for fracture with malunion
M84.312S	Stress fracture, left shoulder, sequela
M84.319A	Stress fracture, unspecified shoulder, initial encounter for fracture
M84.319D	Stress fracture, unspecified shoulder, subsequent encounter for fracture with routine healing

Showing 1–20 of 928

DRG Codes

18 rows

DRG Code	Description
456	Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, Infection or Extensive Fusions with MCC
457	Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, Infection or Extensive Fusions with CC
458	Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, Infection or Extensive Fusions without CC/MCC
521	Hip Replacement with Principal Diagnosis of Hip Fracture with MCC
522	Hip Replacement with Principal Diagnosis of Hip Fracture without MCC
542	Pathological Fractures and Musculoskeletal and Connective Tissue Malignancy with MCC
543	Pathological Fractures and Musculoskeletal and Connective Tissue Malignancy with CC
544	Pathological Fractures and Musculoskeletal and Connective Tissue Malignancy without CC/MCC
551	Medical Back Problems with MCC
552	Medical Back Problems without MCC
559	Aftercare, Musculoskeletal System and Connective Tissue with MCC
560	Aftercare, Musculoskeletal System and Connective Tissue with CC
561	Aftercare, Musculoskeletal System and Connective Tissue without CC/MCC
564	Other Musculoskeletal System and Connective Tissue Diagnoses with MCC
565	Other Musculoskeletal System and Connective Tissue Diagnoses with CC
566	Other Musculoskeletal System and Connective Tissue Diagnoses without CC/MCC
791	Prematurity with Major Problems
793	Full Term Neonate with Major Problems

Typical Clinical Scenarios

An older adult presents to the emergency department after a ground-level fall with acute localized pain and inability to bear weight on the proximal femur. Imaging demonstrates a nondisplaced insufficiency fracture through osteoporotic bone of the femoral neck without open wound; this is an acute encounter for initial treatment of a pathologic/insufficiency fracture due to weakened bone. Typical codes: M84.341A, M84.342A
A middle-aged patient with long-standing corticosteroid therapy for autoimmune disease reports progressive forearm pain and imaging shows stress fractures of the radius with delayed healing over several months; the patient is seen in clinic for ongoing management and monitoring of fracture healing. This represents a subsequent encounter for fracture with delayed healing of a bone weakened by systemic metabolic causes, and a code from the group is assigned to capture the continuity disorder and encounter status. Typical codes: M84.331D, M84.332D
A pediatric patient with a congenital metabolic bone disorder is admitted for planned orthopedic stabilization due to recurrent pathologic fractures of the tibia; multiple old and new cortical disruptions are documented and care includes operative fixation and perioperative management. Coding reflects a disorder of bone continuity related to underlying bone disease and the inpatient encounter for operative treatment of the fracture(s). Typical codes: M84.319K, M84.321K

ICD-10-CM Code For Osteoporosis With Current Pathological Fracture: Group Overview

M81-OSTEOPOROSIS-WITHOUT-FRACTURE

ICD-10-CM Code For Osteoporosis Without Current Pathological Fracture: Group Overview

M83-ADULT-OSTEOMALACIA

ICD-10-CM Code For Adult Osteomalacia: Group Overview

M85-OTHER-BONE-DENSITY-DISORDERS

ICD-10-CM Code For Other Disorders Of Bone Density And Structure: Group Overview

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

ICD-10-CM Code For Disorder Of Continuity Of Bone: Group Overview

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ICD-10-CM M84: Disorder Of Continuity Of Bone Overview

ICD-10-CM Code For Disorder Of Continuity Of Bone: Group Overview

Sign up for ICD-10-CM Code For Disorder Of Continuity Of Bone: Group Overview policy alerts

ICD-10-CM M84: Disorder Of Continuity Of Bone Overview

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

References

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

References

ICD-10-CM Code For Disorder Of Continuity Of Bone: Group Overview

Sign up for ICD-10-CM Code For Disorder Of Continuity Of Bone: Group Overview policy alerts

ICD-10-CM M84: Disorder Of Continuity Of Bone Overview

ICD-10-CM Code For Disorder Of Continuity Of Bone: Group Overview

Sign up for ICD-10-CM Code For Disorder Of Continuity Of Bone: Group Overview policy alerts

ICD-10-CM M84: Disorder Of Continuity Of Bone Overview

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which conditions are included in the ICD-10-CM M84 group?

How are specific bones and encounters represented in the M84 code set?

Why is accurate coding within the M84 group important for reimbursement?

Which DRGs may be related to diagnoses in the M84 group?

How do the seventh characters in codes like `M84.30XA` communicate encounter information?

References

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which conditions are included in the ICD-10-CM M84 group?

How are specific bones and encounters represented in the M84 code set?

Why is accurate coding within the M84 group important for reimbursement?

Which DRGs may be related to diagnoses in the M84 group?

How do the seventh characters in codes like `M84.30XA` communicate encounter information?

References