2027 ICD-10-CM Diagnosis Code M25.659Stiffness of unspecified hip, not elsewhere classified
ICD-10-CM Codes›M00–M99›M20-M25›M25
- Billable — Valid for Submission
- Not Chronic
M25.659 is a billable ICD-10-CM diagnosis code for stiffness of unspecified hip, not elsewhere classified. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 555 through 556. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Musculoskeletal pain, not low back pain.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Active range of hip abduction - finding
- Active range of hip adduction - finding
- Active range of hip extension - finding
- Active range of hip external rotation - finding
- Active range of hip flexion - finding
- Active range of hip internal rotation - finding
- Decreased active range of hip abduction
- Decreased active range of hip adduction
- Decreased active range of hip extension
- Decreased active range of hip external rotation
- Decreased active range of hip flexion
- Decreased active range of hip internal rotation
- Decreased passive range of hip abduction
- Decreased passive range of hip adduction
- Decreased passive range of hip extension
- Decreased passive range of hip external rotation
- Decreased passive range of hip flexion
- Decreased passive range of hip internal rotation
- Decreased range of hip movement
- Hip stiff
- No active range of hip abduction
- No active range of hip adduction
- No active range of hip extension
- No active range of hip external rotation
- No active range of hip flexion
- No active range of hip internal rotation
- No hip movement
- No passive range of hip abduction
- No passive range of hip adduction
- No passive range of hip extension
- No passive range of hip external rotation
- No passive range of hip flexion
- No passive range of hip internal rotation
- Passive range of hip abduction - finding
- Passive range of hip adduction - finding
- Passive range of hip extension - finding
- Passive range of hip external rotation - finding
- Passive range of hip flexion - finding
- Passive range of hip internal rotation - finding
- Range of hip abduction - finding
- Range of hip adduction - finding
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to M25.659: its own notes plus those printed at M25.6, M25, block M00-M25, block M20-M25, and Chapter 13. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
- Disorders affecting predominantly peripheral (limb) joints
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
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.
- 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
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name M25.659, its category, or a range that includes it.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Hip Injuries and Disorders
Your hip is the joint where your femur (thigh bone) meets your pelvis (hip bone). There are two main parts: a ball at the end of the femur, which fits in a socket in the pelvis. Your hip is known as a ball-and-socket joint. This is because you have a ball at the end of your femur, and it fits into a socket in your pelvis.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert M25.659 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About M25.659Overview
What is the ICD-10 code for stiffness of unspecified hip, not elsewhere classified?
The ICD-10-CM code for stiffness of unspecified hip, not elsewhere classified is M25.659 (sometimes written as M25659). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is M25.659 (Stiffness of hip, not elsewhere classified) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report stiffness of unspecified hip, not elsewhere classified on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does M25.659 group to?
When stiffness of unspecified hip, not elsewhere classified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 555, 556, with relative weights from 0.8210 to 1.2908 depending on complications. Higher weights mean higher Medicare reimbursement.
Can M25.659 be reported with a code from M24.6?
Not as a rule. The Excludes1 note at M25.6, which applies to M25.659, lists "ankylosis of joint (M24.6-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
What is the ICD-9 equivalent of M25.659?
Under the General Equivalence Mappings, stiffness of unspecified hip, not elsewhere classified converts to ICD-9-CM 719.55 (jt stiffness NEC-pelvis). The mapping is approximate, so confirm the match fits the documentation.
