R92.342 – Mammographic extreme density, left breast

ICD-10-CM 2027 diagnosis code · Abnormal findings on diagnostic imaging and in function studies, without diagnosis

Billable code

ICD-10-CM code R92.342

Code: R92.342 (claims format: R92342)
Description: Mammographic extreme density, left breast
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 18. Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
Block: R90-R94 Abnormal findings on diagnostic imaging and in function studies, without diagnosis
Parent codes: R92 › R92.3 › R92.34

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

R92.3 – Mammographic density found on imaging of breast

Code also:

, if applicable, inconclusive mammogram (R92.2)

R92.34 – Mammographic extreme density of breast

Applicable to:

Breast density category within Imaging Reporting and Data System (BI-RADS): D

Block R90-R94

Includes:

nonspecific abnormal findings on diagnostic imaging by computerized axial tomography [CAT scan]
nonspecific abnormal findings on diagnostic imaging by magnetic resonance imaging [MRI][NMR]
nonspecific abnormal findings on diagnostic imaging by positron emission tomography [PET scan]
nonspecific abnormal findings on diagnostic imaging by thermography
nonspecific abnormal findings on diagnostic imaging by ultrasound [echogram]
nonspecific abnormal findings on diagnostic imaging by X-ray examination

Excludes1 (not coded here):

abnormal findings on antenatal screening of mother (O28.-)
diagnostic abnormal findings classified elsewhere - see Alphabetical Index

Related codes in R92.34

Frequently asked questions

What is ICD-10 code R92.342?

R92.342 is the ICD-10-CM code for mammographic extreme density, left breast, in the block R90-R94 (Abnormal findings on diagnostic imaging and in function studies, without diagnosis).

Is R92.342 a billable code?

Yes. R92.342 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does R92.342 belong to?

It belongs to category R92 – Abnormal and inconclusive findings on diagnostic imaging of breast.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.