R92.32UpcomingCategory · further specificity required

Mammographic fibroglandular density of breast

R90-R94 · Inherited instructions

Excludes 1

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

R92.3 · Inherited instructions

Code also

, if applicable, inconclusive mammogram (R92.2)

Excludes 2 · 4

Chapters 18 · Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)

Excludes 2

abnormal findings on antenatal screening of mother (O28.-)
certain conditions originating in the perinatal period (P04-P96)
signs and symptoms classified in the body system chapters
signs and symptoms of breast (N63, N64.5)

More specific codes

R92.321Mammographic fibroglandular density, right breast R92.322Mammographic fibroglandular density, left breast R92.323Mammographic fibroglandular density, bilateral breasts

Claims & coverage

When ICD-10-CM is required

For US diagnosis claims covered by HIPAA, ICD-10-CM is required from October 1, 2015.

Use the service date for outpatient/professional claims and the discharge date for hospital inpatient claims. Earlier encounters use ICD-9-CM; each individual code must also be valid for the applicable date.

Official coding guidelines → · CMS ↗

First observed · 2023-10-01

Code history

Latest recorded change · FY2026 · April

ChangedUnchanged

FY2026 · April

Effective from 2026-04-01

Code-level rules changed

Mammographic fibroglandular density of breast

Category — select a more specific code

CDC/NCHS · FY2026 · April

All editions (7)

All editions	Effective from	Code history
FY2024	2023-10-01	Added
FY2024 · 04-01	2024-04-01	No tabular change
FY2025	2024-10-01	No tabular change
FY2025 · 04-01	2025-04-01	No tabular change
FY2026	2025-10-01	No tabular change
FY2026 · April	2026-04-01	Code-level rules changed
FY2027	2026-10-01	No tabular change

Code-level instructions

Inclusion terms

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

Inherited instructions

Chapters 18 · Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)

Excludes 2

abnormal findings on antenatal screening of mother (O28.-)
certain conditions originating in the perinatal period (P04-P96)
signs and symptoms classified in the body system chapters
signs and symptoms of breast (N63, N64.5)

Note

This chapter includes symptoms, signs, abnormal results of clinical or other investigative procedures, and ill-defined conditions regarding which no diagnosis classifiable elsewhere is recorded.
Signs and symptoms that point rather definitely to a given diagnosis have been assigned to a category in other chapters of the classification. In general, categories in this chapter include the less well-defined conditions and symptoms that, without the necessary study of the case to establish a final diagnosis, point perhaps equally to two or more diseases or to two or more systems of the body. Practically all categories in the chapter could be designated 'not otherwise specified', 'unknown etiology' or 'transient'. The Alphabetical Index should be consulted to determine which symptoms and signs are to be allocated here and which to other chapters. The residual subcategories, numbered .8, are generally provided for other relevant symptoms that cannot be allocated elsewhere in the classification.
The conditions and signs or symptoms included in categories R00-R94 consist of:
(a) cases for which no more specific diagnosis can be made even after all the facts bearing on the case have been investigated;
(b) signs or symptoms existing at the time of initial encounter that proved to be transient and whose causes could not be determined;
(c) provisional diagnosis in a patient who failed to return for further investigation or care;
(d) cases referred elsewhere for investigation or treatment before the diagnosis was made;
(e) cases in which a more precise diagnosis was not available for any other reason;
(f) certain symptoms, for which supplementary information is provided, that represent important problems in medical care in their own right.

R90-R94 · Abnormal findings on diagnostic imaging and in function studies, without diagnosis (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

Excludes 1

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

R92.3 · Mammographic density found on imaging of breast

Code also

, if applicable, inconclusive mammogram (R92.2)

More specific codes

R92.321Mammographic fibroglandular density, right breastBillable / specific R92.322Mammographic fibroglandular density, left breastBillable / specific R92.323Mammographic fibroglandular density, bilateral breastsBillable / specific

Official index references (3)

Breast (2)

Breast › Imaging Reporting and Data System(BI-RADS): BDisease index
Breast › Imaging Reporting and Data System(BI-RADS): 2Disease index

Density (1)

Density › breast › mammographic › fibroglandularDisease index

Related codes

Other entries in the same category; these are not automatic substitutes.

Code	Description	Category · further specificity required
R92.30	Dense breasts, unspecified	Billable / specific
R92.31	Mammographic fatty tissue density of breast	Category · further specificity required
R92.33	Mammographic heterogeneous density of breast	Category · further specificity required
R92.34	Mammographic extreme density of breast	Category · further specificity required

Official titles and instructions are preserved in their source language. Official sources ↗

Chapters 18 · Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)

Excludes 2

abnormal findings on antenatal screening of mother (O28.-)
certain conditions originating in the perinatal period (P04-P96)
signs and symptoms classified in the body system chapters
signs and symptoms of breast (N63, N64.5)

Note

This chapter includes symptoms, signs, abnormal results of clinical or other investigative procedures, and ill-defined conditions regarding which no diagnosis classifiable elsewhere is recorded.
Signs and symptoms that point rather definitely to a given diagnosis have been assigned to a category in other chapters of the classification. In general, categories in this chapter include the less well-defined conditions and symptoms that, without the necessary study of the case to establish a final diagnosis, point perhaps equally to two or more diseases or to two or more systems of the body. Practically all categories in the chapter could be designated 'not otherwise specified', 'unknown etiology' or 'transient'. The Alphabetical Index should be consulted to determine which symptoms and signs are to be allocated here and which to other chapters. The residual subcategories, numbered .8, are generally provided for other relevant symptoms that cannot be allocated elsewhere in the classification.
The conditions and signs or symptoms included in categories R00-R94 consist of:
(a) cases for which no more specific diagnosis can be made even after all the facts bearing on the case have been investigated;
(b) signs or symptoms existing at the time of initial encounter that proved to be transient and whose causes could not be determined;
(c) provisional diagnosis in a patient who failed to return for further investigation or care;
(d) cases referred elsewhere for investigation or treatment before the diagnosis was made;
(e) cases in which a more precise diagnosis was not available for any other reason;
(f) certain symptoms, for which supplementary information is provided, that represent important problems in medical care in their own right.