2026 ICD-10-CM Diagnosis Code R89.7Abnormal histological findings in specimens from other organs, systems and tissues

ICD-10-CM Codes›R00–R99›R83-R89›R89

ICD-10-CM R89.7
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

R89.7 is a billable ICD-10-CM diagnosis code for abnormal histological findings in specimens from other organs, systems and tissues. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 947 through 948. As a symptom code, it should not be used as a principal diagnosis once a related definitive diagnosis has been established. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Abnormal findings without diagnosis.

Code Identity

ICD-10-CM Code
R89.7
Billable Status
Yes — Valid for Submission
Code Describes
Abnormal histological findings in specimens from other organs, systems and tissues
Short Description
Abnormal histolog findings in specimens from oth org/tiss
Parent Code
R89
Abnormal findings in specimens from other organs, systems and tissues

Code Classification

ChapterR00–R99Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
SectionR83-R89Abnormal findings on examination of other body fluids, substances and tissues, without diagnosis
CategoryR89Abnormal findings in specimens from other organs, systems and tissues
This CodeR89.7Abnormal histological findings in specimens from other organs, systems and tissues

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • 0-5 mitoses per 10 HPF
  • 1 or more mitotic figure per mm2
  • 10 or more mitotic figures per 10 high power field
  • 6-10 mitoses per 10 HPF
  • Abnormal histology findings
  • Adrenal surgical margin, involved by tumor
  • Artifact
  • Artifact due to crushing
  • Artifact due to freezing
  • Artifact due to smearing
  • Benign glands at surgical margin
  • Biopsy of previous biopsy site shows histological change
  • Biopsy result abnormal
  • Breast tubule formation finding
  • Breast tubule formation, majority of tumor greater than 75 percent
  • Breast tubule formation, minimal less than 10 percent
  • Breast tubule formation, moderate 10 percent to 75 percent
  • Cellular changes consistent with Cytomegalovirus
  • Deep
  • Deep radial periureteral soft tissue surgical margin, involved by tumor
  • Deep surgical margin involvement by tumor present
  • Deep surgical margin, focal, involvement by tumor present
  • Deep surgical margin, multifocal, involvement by tumor present
  • Distal ureteral surgical margin, involved by tumor
  • G3-4: Poorly differentiated/undifferentiated
  • Gerota's fascial surgical margin, involved by tumor
  • Greater than 10 mitoses per 10 HPF
  • Greater than 20 mitoses per 10 HPF
  • Greater than 4 mitoses per high power field
  • Gross pathology
  • Gross pathology - abnormality
  • Heart surgical margin, involved by tumor
  • Histological necrosis present after induction chemotherapy
  • Inferior lateral surgical margin, involvement by tumor present
  • Kidney, ureteral surgical margin, involved by tumor
  • Left lateral surgical margin, involvement by tumor present
  • Left parametrial surgical margin, involved by tumor
  • Less than 1 mitotic figure per mm2
  • Less than 10 mitoses per 10 HPF
  • Less than or equal to 4 mitoses per high power field
  • Microcalcifications present in specimen
  • Muscularis propria absent in specimen
  • Nonsurgical biopsy result abnormal
  • Pathology examination findings present
  • Pleura, great vessels surgical margin, involved by tumor
  • Proximal renal margin, partial nephrectomy only, involved by tumor
  • Proximal ureteral surgical margin, involved by tumor
  • Renal capsular surgical margin, involved by tumor
  • Renal pelvis surgical margin, involved by tumor
  • Renal pelvis, deep radial hilar surgical margin, involved by tumor
  • Renal pelvis, renal parenchymal surgical margin, involved by tumor
  • Renal vein surgical margin, involved by tumor
  • Right lateral surgical margin, involved by tumor
  • Right parametrial surgical margin, involved by tumor
  • Small vessel invasion by tumor present
  • Specimen involvement by macroscopic tumor present
  • Specimen involvement by matted nodes present
  • Specimen involvement by satellite nodule absent
  • Specimen involvement by satellite nodule present
  • Specimen obscured by inflammation
  • Specimen obscured by mucus
  • Specimen shows excessive cytolysis
  • Specimen with abnormal presence of endometrial cells
  • Superior lateral surgical margin, involved by tumor
  • Surgical anterior margin involved by malignant neoplasm
  • Surgical apical margin involved by malignant neoplasm
  • Surgical bile duct margin involved by carcinoma in situ
  • Surgical bile duct margin involved by malignant neoplasm
  • Surgical bladder neck margin involved by malignant neoplasm
  • Surgical bronchial margin involved by tumor
  • Surgical chest wall margin involved by malignant neoplasm
  • Surgical circumferential margin finding
  • Surgical circumferential margin involved by lymphoma
  • Surgical circumferential margin involved by malignant neoplasm
  • Surgical cystic duct margin involved by in situ carcinoma
  • Surgical cystic duct margin involved by malignant neoplasm
  • Surgical deep margin involved by ductal carcinoma in situ
  • Surgical deep margin involved by in situ carcinoma
  • Surgical deep margin involved by intraepithelial neoplasia
  • Surgical deep margin involved by malignant melanoma
  • Surgical deep margin involved by malignant neoplasm
  • Surgical deep margin involved by malignant neoplasm, focal
  • Surgical deep margin involved by malignant neoplasm, multifocal
  • Surgical distal bile duct margin involved by malignant neoplasm
  • Surgical distal margin involved by in situ carcinoma
  • Surgical distal margin involved by in situ carcinoma/adenoma
  • Surgical distal margin involved by lymphoma
  • Surgical distal margin involved by malignant neoplasm
  • Surgical distal margin involved by tumor
  • Surgical distal mucosal margin involved by in situ carcinoma
  • Surgical Gerota's fascial margin involved by malignant neoplasm
  • Surgical greater omental margin involved by malignant neoplasm
  • Surgical inferior margin involved by ductal carcinoma in situ
  • Surgical inferior margin involved by malignant neoplasm
  • Surgical inferior margin is closest uninvolved margin to malignant neoplasm
  • Surgical lateral margin involved by adenoma
  • Surgical lateral margin involved by in situ carcinoma
  • Surgical lateral margin involved by in situ carcinoma/adenoma
  • Surgical lateral margin involved by malignant neoplasm
  • Surgical lateral margin involved by ductal carcinoma in situ
  • Surgical lateral margin involved by in situ melanoma
  • Surgical lateral margin involved by malignant melanoma
  • Surgical lateral margin involved by tumor
  • Surgical margin involved by ductal carcinoma in situ
  • Surgical margin involved by ductal carcinoma in situ, extensive
  • Surgical margin involved by ductal carcinoma in situ, multifocal
  • Surgical margin involved by ductal carcinoma in situ, unifocal
  • Surgical margin involved by in situ carcinoma
  • Surgical margin involved by in situ carcinoma/adenoma
  • Surgical margin involved by intraepithelial neoplasia
  • Surgical margin involved by malignant neoplasm
  • Surgical margin involved by malignant neoplasm, extensive
  • Surgical margin involved by malignant neoplasm, multifocal
  • Surgical margin involved by malignant neoplasm, unifocal
  • Surgical margin involved by sarcoma
  • Surgical margin involvement by sarcoma cannot be assessed
  • Surgical margin involvement by tumor present
  • Surgical margin of optic nerve involved by tumor
  • Surgical margin of renal vessel involved by tumor
  • Surgical medial margin involved by ductal carcinoma in situ
  • Surgical medial margin involved by malignant neoplasm
  • Surgical mucosal margin involved by adenoma
  • Surgical mucosal margin involved by in situ carcinoma
  • Surgical mucosal margin involved by malignant neoplasm
  • Surgical omental margin finding
  • Surgical pancreatic duct margin involved by in situ carcinoma
  • Surgical pancreatic parenchymal margin involved by in situ carcinoma
  • Surgical parenchymal margin finding
  • Surgical parenchymal margin involved by malignant neoplasm
  • Surgical perinephric fat margin involved by malignant neoplasm
  • Surgical posterior margin involved by malignant neoplasm
  • Surgical posterolateral margin involved by malignant neoplasm
  • Surgical proximal bile duct margin involved by malignant neoplasm
  • Surgical proximal margin involved by adenoma
  • Surgical proximal margin involved by adenoma with high-grade dysplasia
  • Surgical proximal margin involved by adenoma with low-grade dysplasia
  • Surgical proximal margin involved by in situ carcinoma
  • Surgical proximal margin involved by in situ carcinoma/adenoma
  • Surgical proximal margin involved by lymphoma
  • Surgical proximal margin involved by malignant neoplasm
  • Surgical proximal mucosal margin involved by in situ carcinoma
  • Surgical renal capsular margin involved by malignant neoplasm
  • Surgical renal parenchymal margin involved by malignant neoplasm
  • Surgical renal vein margin involved by malignant neoplasm
  • Surgical superior margin involved by ductal carcinoma in situ
  • Surgical superior margin involved by malignant neoplasm
  • Surgical ureteral margin involved by malignant neoplasm
  • Surgical vascular margin involved by malignant neoplasm
  • Syphilis test finding
  • Thyroid surgical margin, involved by tumor
  • Treponema pallidum detected by enzyme-linked immunosorbent assay
  • Ureter, renal pelvis surgical margin, involved by tumor
  • Ureteral surgical margin, involved by tumor
  • Urinary bladder surgical margin, involved by tumor
  • Urinary bladder, deep radial surgical margin, involved by tumor
  • Urinary bladder, urachal surgical margin, involved by tumor
  • Urinary bladder, ureteral surgical margin, involved by tumor
  • Urinary bladder, urethral surgical margin, involved by tumor
  • Urinary bladder, uterine surgical margin, involved by tumor
  • Urinary bladder, vaginal surgical margin, involved by tumor

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Abnormal, abnormality, abnormalities
      • histology NEC
    • Abnormal, abnormality, abnormalities
      • myoglobin (Aberdeen) (Annapolis)
    • Abnormal, abnormality, abnormalities
      • specimen
        • specified organ, system and tissue NOS
          • histology
    • Infiltrate, infiltration
      • calcareous NEC
    • Infiltrate, infiltration
      • calcium salt
    • Mallory's bodies

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR SYM017
Abnormal findings without diagnosis
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Biopsy Finding

    a description of the findings from a biopsy.

Convert R89.7 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
792.9 Abn find-body subst NEC
Approximate The match is approximate rather than exact.
ICD-9-CM
795.4 Abn histologic find NEC
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About R89.7Overview

Is R89.7 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report abnormal histological findings in specimens from other organs, systems and tissues on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does R89.7 group to?

When abnormal histological findings in specimens from other organs, systems and tissues is the principal diagnosis on an inpatient stay, it groups to MS-DRG 947, 948, with relative weights from 0.8005 to 1.2694 depending on complications. Higher weights mean higher Medicare reimbursement.

Can R89.7 be a principal diagnosis?

Use it with care. This is a symptom code, so once a definitive diagnosis explaining the abnormal histological findings in specimens from other organs, systems and tissues is established, that condition takes the principal position instead.

What is the ICD-9 equivalent of R89.7?

Under the General Equivalence Mappings, abnormal histological findings in specimens from other organs, systems and tissues converts to ICD-9-CM 792.9 (abn find-body subst NEC) and 795.4 (abn histologic find NEC). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.