2027 ICD-10-CM Diagnosis Code M84.751AIncomplete atypical femoral fracture, right leg, initial encounter for fracture
ICD-10-CM Codes›M00–M99›M80-M85›M84
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- 7th Character A — Initial Encounter for Fracture
- Not Chronic
M84.751A is a billable ICD-10-CM diagnosis code for incomplete atypical femoral fracture, right leg, initial encounter for fracture. The 7th character A means initial encounter for fracture, used while the patient is receiving active treatment. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 521 through 522, 542 through 544, 791, 793. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 214 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Atypical fracture, initial encounter.
Code Identity
Code Classification
Quality Payment Program MeasuresBilling
Medicare quality measures that can apply when M84.751A is part of the patient record.
Communication with the Physician or Other Clinician Managing On-Going Care Post-Fracture for Men and Women Aged 50 Years and Older
High Priority: YES
Measure Type: Process
Submission Methods: Claims, Registry
Description: Percentage of patients aged 50 years and older treated for a fracture with documentation of communication, between the physician treating the fracture and the physician or other clinician managing the patient’s on-going care, that a fracture occurred and that the patient was or should be considered for osteoporosis treatment or testing. This measure is submitted by the physician who treats the fracture and who therefore is held accountable for the communication.
Osteoporosis Management in Women Who Had a Fracture
High Priority: NO
Measure Type: Process
Submission Methods: Claims, Registry
Description: The percentage of women 50-85 years of age who suffered a fracture and who had either a bone mineral density (BMD) test or prescription for a drug to treat osteoporosis in the 180 days after the fracture.
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to M84.751A: its own notes plus those printed at M84.75, 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.
- traumatic fracture of bone-see fracture, by site
- 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)
Notes
General instructions on how these codes are used.
- 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.
- The appropriate 7th character is to be added to each code from M84.75:
- Ainitial encounter for fracture this code
- Dsubsequent encounter for fracture with routine healing
- Gsubsequent encounter for fracture with delayed healing
- 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.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Fractures
A fracture is a break in a bone. Fractures are usually caused by injuries. Since they can sometimes be serious, it's important to get medical care right away if you think you have a fracture.
The full article covers:
- What is a fracture?
- What are the different types of fractures?
- What causes fractures?
- What are the symptoms of a fracture?
- How are fractures diagnosed?
- What are the treatments for fractures?
- Can fractures be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert M84.751A to ICD-9-CMHistory
Code History & ChangesHistory
Replacement M84.751A replaces the following previously assigned code(s):
- S72.8X1A - Oth fracture of right femur, init encntr for closed fracture
- S72.8X2A - Oth fracture of left femur, init encntr for closed fracture
- S72.8X9A - Oth fracture of unsp femur, init encntr for closed fracture
Questions About M84.751AOverview
Is M84.751A (Incomplete atypical femoral fracture, right leg) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report incomplete atypical femoral fracture, right leg, initial encounter for fracture on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What does the 7th character A in M84.751A mean?
The final character A marks the initial encounter: use it while the patient is receiving active treatment for incomplete atypical femoral fracture, right leg, such as an emergency visit or first evaluation. In this category the CMS Tabular List defines A as "initial encounter for fracture".
What MS-DRG does M84.751A group to?
When incomplete atypical femoral fracture, right leg, initial encounter for fracture is the principal diagnosis on an inpatient stay, it groups to MS-DRG 543, 793, 791, 521, 544, 522, 542, with relative weights from 0.7404 to 4.2192 depending on complications. Higher weights mean higher Medicare reimbursement.
Is M84.751A a CC or MCC?
CMS lists M84.751A as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 214 closely related codes in its exclusion list.
What is the ICD-9 equivalent of M84.751A?
Under the General Equivalence Mappings, incomplete atypical femoral fracture, right leg, initial encounter for fracture converts to ICD-9-CM 733.14 (path fx neck of femur) and 733.15 (path fx oth spcf prt fmr). The mapping is approximate, so confirm the match fits the documentation.
