2027 ICD-10-CM Diagnosis Code P94.9Disorder of muscle tone of newborn, unspecified
ICD-10-CM Codes›P00–P96›P90-P96›P94
- Billable — Valid for Submission
- Not Chronic
P94.9 is a billable ICD-10-CM diagnosis code for disorder of muscle tone of newborn, unspecified. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 794. Coders also document this condition as abnormal muscle function. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified perinatal conditions.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Abnormal muscle function
- Absent muscle function
- Decreased muscle function
- Disorder of muscle
- Neonatal muscle tone disorder
- Truncal muscle weakness
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to P94.9: its own notes plus those printed at Chapter 16. 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.
- conditions that have their origin in the fetal or perinatal period (before birth through the first 28 days after birth) even if morbidity occurs later
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.
Notes
General instructions on how these codes are used.
- Codes from this chapter are for use on newborn records only, never on maternal records
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Disorder (of) See Also: Disease;
tone, newborn P94.9
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Muscle Disorders
Your muscles help you move and help your body work. Different types of muscles have different jobs. There are many problems that can affect muscles. Muscle disorders can cause weakness, pain or even paralysis.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert P94.9 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About P94.9Overview
What is the ICD-10 code for disorder of muscle tone of newborn, unspecified?
The ICD-10-CM code for disorder of muscle tone of newborn, unspecified is P94.9 (sometimes written as P949). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is P94.9 (Disorders of muscle tone of newborn) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report disorder of muscle tone of newborn, unspecified on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does P94.9 group to?
When disorder of muscle tone of newborn, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 794 (neonate with Other Significant Problems), which carries a relative weight of 1.4934. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of P94.9?
Under the General Equivalence Mappings, disorder of muscle tone of newborn, unspecified converts to ICD-9-CM 779.89 (perinatal condition NEC). The mapping is approximate, so confirm the match fits the documentation.
