2026 ICD-10-CM Diagnosis Code R89.6Abnormal cytological findings in specimens from other organs, systems and tissues

ICD-10-CM Codes›R00–R99›R83-R89›R89

ICD-10-CM R89.6
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

R89.6 is a billable ICD-10-CM diagnosis code for abnormal cytological 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
R89.6
Billable Status
Yes — Valid for Submission
Code Describes
Abnormal cytological findings in specimens from other organs, systems and tissues
Short Description
Abnormal cytological 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 CodeR89.6Abnormal cytological findings in specimens from other organs, systems and tissues

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Abnormal cytology findings
  • Aggregation
  • Barr body absent, nuclear sex male
  • Barr body present, nuclear sex female
  • Barr body, more than one present per cell
  • Bite cells
  • Blast cells present
  • Bone marrow granulocytic aplasia
  • Bone marrow granulocytic hypoplasia
  • Bone marrow megakaryocytes - finding
  • Bone marrow myeloid cells - finding
  • Bone marrow myeloid dysplasia
  • Bone marrow myeloid hypoplasia
  • Bone marrow: foreign cells - finding
  • Bone marrow: lymphocytes
  • Bone marrow: myeloma cells
  • Bone marrow: tumor cells
  • Cell center alteration
  • Cell division alteration
  • Cellular changes consistent with Herpes simplex
  • Centriole alteration
  • Centrosphere alteration
  • Clue cells present
  • Cytokinetic alteration
  • Cytology findings present
  • Cytoplasmic crystalline aggregate
  • Cytoplasmic lipid aggregate
  • Cytoplasmic macromolecular aggregate
  • Detected by cytology
  • DNA mismatch repair
  • DNA repair
  • Echinocytosis
  • Hemosiderin laden macrophages seen
  • High risk human papillomavirus detected by cytology
  • Isolated tumor cells present
  • L.E. cell level - finding
  • L.E. cells present
  • Large unstained cells
  • Marrow megakaryocyte decrease
  • Marrow megakaryocyte increase
  • Marrow megakaryocytes abnormal
  • Marrow: primitive blast cells+
  • Metamyelocytes present
  • Myelocytes present
  • Nuclear abnormality on smear
  • Polar body alteration
  • Post BCG intravesical immunotherapy changes
  • Presence of cells
  • Pus cells
  • Pus cells present
  • RBCs seen on microscopy
  • Specimen satisfactory for evaluation but limited by cellular degeneration
  • Specimen unsatisfactory for evaluation due to marked cellular degeneration
  • Synovial fluid cell count high
  • Synovial fluid: LE cells
  • Tissue cytology abnormal
  • White cells seen on microscopy

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
      • Papanicolaou (smear)
        • nipple discharge
    • Abnormal, abnormality, abnormalities
      • Papanicolaou (smear)
        • sites NEC
    • Abnormal, abnormality, abnormalities
      • Papanicolaou (smear)
        • synovial fluid
    • Abnormal, abnormality, abnormalities
      • Papanicolaou (smear)
        • wound secretions
    • Abnormal, abnormality, abnormalities
      • specimen
        • specified organ, system and tissue NOS
          • cytology

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

  • DNA Mismatch Repair

    a dna repair pathway involved in correction of errors introduced during dna replication when an incorrect base, which cannot form hydrogen bonds with the corresponding base in the parent strand, is incorporated into the daughter strand. excinucleases recognize the base pair mismatch and cause a segment of polynucleotide chain to be excised from the daughter strand, thereby removing the mismatched base. (from oxford dictionary of biochemistry and molecular biology, 2001)

  • MutS DNA Mismatch-Binding Protein

    a methyl-directed mismatch dna repair protein that has weak atpase activity. muts was originally described in escherichia coli.

  • DNA End-Joining Repair

    the repair of double-strand dna breaks by rejoining the broken ends of dna to each other directly.

  • DNA Repair

    the removal of dna lesions and/or restoration of intact dna strands without base pair mismatches, intrastrand or interstrand crosslinks, or discontinuities in the dna sugar-phosphate backbones.

  • DNA Repair Enzymes

    enzymes that are involved in the reconstruction of a continuous two-stranded dna molecule without mismatch from a molecule, which contained damaged regions.

  • DNA Repair-Deficiency Disorders

    disorders resulting from defective dna repair processes or the associated cellular responses to dna damage.

  • O(6)-Methylguanine-DNA Methyltransferase

    an enzyme that transfers methyl groups from o(6)-methylguanine, and other methylated moieties of dna, to a cysteine residue in itself, thus repairing alkylated dna in a single-step reaction. ec 2.1.1.63.

  • Rad52 DNA Repair and Recombination Protein

    a dna-binding protein that mediates dna repair of double strand breaks, and homologous recombination.

  • Recombinational DNA Repair

    repair of dna damage by exchange of dna between matching sequences, usually between the allelic dna (alleles) of sister chromatids.

  • DNA

    a deoxyribonucleotide polymer that is the primary genetic material of all cells. eukaryotic and prokaryotic organisms normally contain dna in a double-stranded state, yet several important biological processes transiently involve single-stranded regions. dna, which consists of a polysugar-phosphate backbone possessing projections of purines (adenine and guanine) and pyrimidines (thymine and cytosine), forms a double helix that is held together by hydrogen bonds between these purines and pyrimidines (adenine to thymine and guanine to cytosine).

Convert R89.6 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.

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 R89.6Overview

Is R89.6 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report abnormal cytological 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 R89.6 group to?

When abnormal cytological 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 R89.6 be a principal diagnosis?

Use it with care. This is a symptom code, so once a definitive diagnosis explaining the abnormal cytological 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 R89.6?

Under the General Equivalence Mappings, abnormal cytological findings in specimens from other organs, systems and tissues converts to ICD-9-CM 792.9 (abn find-body subst 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.