M84.4
Non-Billable

Pathological fracture, not elsewhere classified

Non-Billable / Non-Specific Code

What is Pathological fracture, not elsewhere classified?

ICD-10-CM M84.4 is the diagnosis code for Pathological fracture, not elsewhere classified. This code falls under the section "Disorders of bone density and structure" within Chapter 13 — Diseases of the musculoskeletal system and connective tissue (M00-M99). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.

💡 Inclusions
⛔ Excludes1
â„šī¸ Excludes2

Coding Guidelines for M84.4

✅ This Code Includes

  • Chronic fracture
  • Pathological fracture NOS

⛔ Type 1 Excludes (Never code together)

The following conditions should never be coded at the same time as M84.4. They are mutually exclusive:

  • collapsed vertebra NEC (M48.5)
  • pathological fracture in neoplastic disease (M84.5-)
  • pathological fracture in osteoporosis (M80.-)
  • pathological fracture in other disease (M84.6-)
  • stress fracture (M84.3-)
  • traumatic fracture (S12.-, S22.-, S32.-, S42.-, S52.-, S62.-, S72.-, S82.-, S92.-)

â„šī¸ Type 2 Excludes (Code separately if applicable)

The following conditions are not included in M84.4. If the patient has both, code each condition separately:

  • personal history of (healed) pathological fracture (Z87.311)

ICD-10-CM Code Hierarchy

Understanding where M84.4 sits in the ICD-10-CM classification helps ensure proper coding:

Sub-Codes 9 entries
M84.40Pathological fracture, unspecified siteBillableM84.41Pathological fracture, shoulderNon-BillableM84.411Pathological fracture, right shoulderBillableM84.412Pathological fracture, left shoulderBillableM84.419Pathological fracture, unspecified shoulderBillableM84.42Pathological fracture, humerusNon-BillableM84.421Pathological fracture, right humerusBillableM84.422Pathological fracture, left humerusBillableM84.429Pathological fracture, unspecified humerusBillableM84.43Pathological fracture, ulna and radiusNon-BillableM84.431Pathological fracture, right ulnaBillableM84.432Pathological fracture, left ulnaBillableM84.433Pathological fracture, right radiusBillableM84.434Pathological fracture, left radiusBillableM84.439Pathological fracture, unspecified ulna and radiusBillableM84.44Pathological fracture, hand and fingersNon-BillableM84.441Pathological fracture, right handBillableM84.442Pathological fracture, left handBillableM84.443Pathological fracture, unspecified handBillableM84.444Pathological fracture, right finger(s)BillableM84.445Pathological fracture, left finger(s)BillableM84.446Pathological fracture, unspecified finger(s)BillableM84.45Pathological fracture, femur and pelvisNon-BillableM84.451Pathological fracture, right femurBillableM84.452Pathological fracture, left femurBillableM84.453Pathological fracture, unspecified femurBillableM84.454Pathological fracture, pelvisBillableM84.459Pathological fracture, hip, unspecifiedBillableM84.46Pathological fracture, tibia and fibulaNon-BillableM84.461Pathological fracture, right tibiaBillableM84.462Pathological fracture, left tibiaBillableM84.463Pathological fracture, right fibulaBillableM84.464Pathological fracture, left fibulaBillableM84.469Pathological fracture, unspecified tibia and fibulaBillableM84.47Pathological fracture, ankle, foot and toesNon-BillableM84.471Pathological fracture, right ankleBillableM84.472Pathological fracture, left ankleBillableM84.473Pathological fracture, unspecified ankleBillableM84.474Pathological fracture, right footBillableM84.475Pathological fracture, left footBillableM84.476Pathological fracture, unspecified footBillableM84.477Pathological fracture, right toe(s)BillableM84.478Pathological fracture, left toe(s)BillableM84.479Pathological fracture, unspecified toe(s)BillableM84.48Pathological fracture, other siteBillable
Related Codes

Frequently Asked Questions

Is M84.4 a billable ICD-10-CM code?

No, M84.4 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.

What does M84.4 mean?

M84.4 is the ICD-10-CM diagnosis code for "Pathological fracture, not elsewhere classified". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.

What is the parent code of M84.4?

The parent code of M84.4 is M84 ("Disorder of continuity of bone"). M84.4 provides a more specific classification within this category.

What section is M84.4 in?

M84.4 is located in Section M80-M85 — "Disorders of bone density and structure" within Chapter 13 of the ICD-10-CM Tabular List.

What are the sub-codes of M84.4?

M84.4 has 9 sub-code(s) that provide more specific detail: M84.40, M84.41, M84.42, M84.43, M84.44 and more.

When should I use M84.4?

Use M84.4 when the patients documented diagnosis matches "Pathological fracture, not elsewhere classified" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.

People Also Ask

What is the ICD-10 code for Pathological fracture, not elsewhere classified?

The ICD-10-CM code for Pathological fracture, not elsewhere classified is M84.4.

Can M84.4 be used for primary diagnosis?

No, M84.4 is non-billable. Use a more specific sub-code for primary diagnosis billing.

What chapter is M84.4 in?

M84.4 is in Chapter 13 of the ICD-10-CM Tabular List.

What conditions are excluded from M84.4?

Type 1 Excludes for M84.4 include: collapsed vertebra NEC (M48.5); pathological fracture in neoplastic disease (M84.5-); pathological fracture in osteoporosis (M80.-) and more.

Is M84.4 valid for 2026?

Yes, M84.4 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.

See Also

← PreviousM84.38Stress fracture, other siteNext →M84.40Pathological fracture, unspecified site
Code Details
M84.4
Pathological fracture, not elsewhere classified
Non-Billable / Non-Specific Code
13 — Diseases of the musculoskeletal system and connective tissue (M00-M99)
M80-M85 — Disorders of bone density and structure
2026 ICD-10-CM