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ICD-10/M84.751A

M84.751A ICD-10-CM Code: Incomplete atypical femoral fracture, right leg, initial encounter for fracture

Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Inpatient Payment Groups (MS-DRG)

MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43.0, Appendix B.

  • MS-DRG 521 — HIP REPLACEMENT WITH PRINCIPAL DIAGNOSIS OF HIP FRACTURE WITH MCC (MDC 08)
  • MS-DRG 522 — HIP REPLACEMENT WITH PRINCIPAL DIAGNOSIS OF HIP FRACTURE WITHOUT MCC (MDC 08)
  • MS-DRG 542 — PATHOLOGICAL FRACTURES AND MUSCULOSKELETAL AND CONNECTIVE TISSUE MALIGNANCY WITH MCC (MDC 08)
  • MS-DRG 543 — PATHOLOGICAL FRACTURES AND MUSCULOSKELETAL AND CONNECTIVE TISSUE MALIGNANCY WITH CC (MDC 08)
  • MS-DRG 544 — PATHOLOGICAL FRACTURES AND MUSCULOSKELETAL AND CONNECTIVE TISSUE MALIGNANCY WITHOUT CC/MCC (MDC 08)
  • MS-DRG 791 — PREMATURITY WITH MAJOR PROBLEMS (MDC 15)
  • MS-DRG 793 — FULL TERM NEONATE WITH MAJOR PROBLEMS (MDC 15)

A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.

Official Registry Overview & Definition

Incomplete atypical femoral fracture, right leg, initial encounter for fracture is a billable ICD-10-CM diagnosis code (M84.751A).

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for M84.751A in the official ICD-10-CM tabular list.

Excludes2 — Not Included Here

Conditions not covered by this code, but which may be reported alongside it when both are present.

  • traumatic fracture of bone-see fracture, by site

Change history

  • FY2017 — 2016-10-01
    Added to the code set
    Incomplete atypical femoral fracture, right leg, initial encounter for fracture
    FY2017 changes

Verify Before Coding

  • CC as a secondary diagnosis (FY2026). Can raise the stay's MS-DRG severity tier.

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim.

Contextual Map

Every relationship of M84.751A in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Hierarchy

  • M00-M99 — Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue (M00-M99) (M00-M99) [Hierarchy]
  • M80-M85 — Disorders of bone density and structure [Hierarchy]

Clinical classification (CCSR)

  • MUS018 — Atypical fracture, initial encounter [CCSR]

Potential MS-DRG

  • CC — Complication or Comorbidity [MS-DRG severity]: “As a secondary diagnosis this code can raise the stay's MS-DRG severity tier (CC).”
  • DRG 521 — HIP REPLACEMENT WITH PRINCIPAL DIAGNOSIS OF HIP FRACTURE WITH MCC [MS-DRG]: “HIP REPLACEMENT WITH PRINCIPAL DIAGNOSIS OF HIP FRACTURE WITH MCC (MDC 08)”
  • DRG 522 — HIP REPLACEMENT WITH PRINCIPAL DIAGNOSIS OF HIP FRACTURE WITHOUT MCC [MS-DRG]: “HIP REPLACEMENT WITH PRINCIPAL DIAGNOSIS OF HIP FRACTURE WITHOUT MCC (MDC 08)”
  • DRG 542 — PATHOLOGICAL FRACTURES AND MUSCULOSKELETAL AND CONNECTIVE TISSUE MALIGNANCY WITH MCC [MS-DRG]: “PATHOLOGICAL FRACTURES AND MUSCULOSKELETAL AND CONNECTIVE TISSUE MALIGNANCY WITH MCC (MDC 08)”
  • DRG 543 — PATHOLOGICAL FRACTURES AND MUSCULOSKELETAL AND CONNECTIVE TISSUE MALIGNANCY WITH CC [MS-DRG]: “PATHOLOGICAL FRACTURES AND MUSCULOSKELETAL AND CONNECTIVE TISSUE MALIGNANCY WITH CC (MDC 08)”
  • DRG 544 — PATHOLOGICAL FRACTURES AND MUSCULOSKELETAL AND CONNECTIVE TISSUE MALIGNANCY WITHOUT CC/MCC [MS-DRG]: “PATHOLOGICAL FRACTURES AND MUSCULOSKELETAL AND CONNECTIVE TISSUE MALIGNANCY WITHOUT CC/MCC (MDC 08)”
  • DRG 791 — PREMATURITY WITH MAJOR PROBLEMS [MS-DRG]: “PREMATURITY WITH MAJOR PROBLEMS (MDC 15)”
  • DRG 793 — FULL TERM NEONATE WITH MAJOR PROBLEMS [MS-DRG]: “FULL TERM NEONATE WITH MAJOR PROBLEMS (MDC 15)”

MDC crossing · procedures (18508)

  • MDC 08 — Diseases and Disorders of the Musculoskeletal System and Connective Tissue [MDC crossing]: “Diseases and Disorders of the Musculoskeletal System and Connective Tissue — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs.”
  • MDC 15 — Newborns and Other Neonates with Conditions Originating in Perinatal Period [MDC crossing]: “Newborns and Other Neonates with Conditions Originating in Perinatal Period — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs.”
  • 005T0ZZ — Destruction of Spinal Meninges, Open Approach [Same-MDC procedure]: “Destruction of Spinal Meninges, Open Approach — grouped in MDC 08, the procedure side of this code's crossing.” · check together
  • 005T3ZZ — Destruction of Spinal Meninges, Percutaneous Approach [Same-MDC procedure]: “Destruction of Spinal Meninges, Percutaneous Approach — grouped in MDC 08, the procedure side of this code's crossing.” · check together
  • 005T4ZZ — Destruction of Spinal Meninges, Percutaneous Endoscopic Approach [Same-MDC procedure]: “Destruction of Spinal Meninges, Percutaneous Endoscopic Approach — grouped in MDC 08, the procedure side of this code's crossing.” · check together
  • 005W0Z3 — Destruction of Cervical Spinal Cord using Laser Interstitial Thermal Therapy, Open Approach [Same-MDC procedure]: “Destruction of Cervical Spinal Cord using Laser Interstitial Thermal Therapy, Open Approach — grouped in MDC 08, the procedure side of this code's crossing.” · check together
  • 005W0ZZ — Destruction of Cervical Spinal Cord, Open Approach [Same-MDC procedure]: “Destruction of Cervical Spinal Cord, Open Approach — grouped in MDC 08, the procedure side of this code's crossing.” · check together
  • and 18503 more

Index entries

  • Fracture, nontraumatic, NEC, atypical, femur, incomplete, right side[Index term]

Nearest codes (40)

  • M84 — Disorder of continuity of bone [Sibling]
  • M84.676K — Pathological fracture in other disease, unspecified foot, subsequent encounter for fracture with nonunion [Sibling]
  • M84.676P — Pathological fracture in other disease, unspecified foot, subsequent encounter for fracture with malunion [Sibling]
  • M84.676S — Pathological fracture in other disease, unspecified foot, sequela [Sibling]
  • M84.68 — Pathological fracture in other disease, other site [Sibling]
  • M84.68XA — Pathological fracture in other disease, other site, initial encounter for fracture [Sibling]
  • M84.68XD — Pathological fracture in other disease, other site, subsequent encounter for fracture with routine healing [Sibling]
  • M84.68XG — Pathological fracture in other disease, other site, subsequent encounter for fracture with delayed healing [Sibling]
  • and 32 more

Change history

  • FY2017 — Added to the code set [Change history]

Relationships & Classification

Clinical classification (AHRQ CCSR):MUS018 — Atypical fracture, initial encounter (default).

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Potential MS-DRG Relationships (FY2026)

CC — Complication or Comorbidity. Reported as a secondary diagnosis, this code raises the stay's MS-DRG severity tier — except when the principal diagnosis is one of 214 clinically related codes on its CMS exclusion list.

Named in the grouper logic of 7 MS-DRGs: DRG 521 (MDC 08), DRG 522 (MDC 08), DRG 542 (MDC 08), DRG 543 (MDC 08), DRG 544 (MDC 08), DRG 791 (MDC 15), DRG 793 (MDC 15).

From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.

Frequently Asked Questions (FAQ) & Clinical Guidance

Does M84.751A require a 7th character?

Yes. The appropriate 7th character is to be added to each code from M84.75:.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to M84.751A in its code family, with their registry titles.

  • M84.750G — Atypical femoral fracture, unspecified, subsequent encounter for fracture with delayed healing
  • M84.750K — Atypical femoral fracture, unspecified, subsequent encounter for fracture with nonunion
  • M84.750P — Atypical femoral fracture, unspecified, subsequent encounter for fracture with malunion
  • M84.750S — Atypical femoral fracture, unspecified, sequela
  • M84.751 — Incomplete atypical femoral fracture, right leg
  • M84.751D — Incomplete atypical femoral fracture, right leg, subsequent encounter for fracture with routine healing
  • M84.751G — Incomplete atypical femoral fracture, right leg, subsequent encounter for fracture with delayed healing
  • M84.751K — Incomplete atypical femoral fracture, right leg, subsequent encounter for fracture with nonunion
  • M84.751P — Incomplete atypical femoral fracture, right leg, subsequent encounter for fracture with malunion
  • M84.751S — Incomplete atypical femoral fracture, right leg, sequela

View all codes in the M84 family

Indexed Clinical Terms (1)

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.

  • Fracture, nontraumatic, NEC, atypical, femur, incomplete, right side