R70-R79
Medium Complexity

Abnormal findings on examination of blood, without diagnosis

Primary Specialty: Hematology
Last Updated: 2025-09-10

ICD-10 Codes (54)

50 billable
0 category headers
R71
Billable
Abnormality of red blood cells
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R71.0
Billable
Precipitous drop in hematocrit
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R71.8
Billable
Other abnormality of red blood cells
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R73
Elevated blood glucose level
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R73.0
Billable
Abnormal glucose
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R73.01
Billable
Impaired fasting glucose
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R73.02
Billable
Impaired glucose tolerance (oral)
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R73.03
Billable
Prediabetes
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R73.09
Billable
Other abnormal glucose
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R73.9
Billable
Hyperglycemia, unspecified
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R74
Billable
Abnormal serum enzyme levels
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R74.0
Billable
Nonspecific elevation of levels of transaminase and lactic acid dehydrogenase [LDH]
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R74.01
Billable
Elevation of levels of liver transaminase levels
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R74.02
Billable
Elevation of levels of lactic acid dehydrogenase [LDH]
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R74.8
Billable
Abnormal levels of other serum enzymes
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R74.9
Billable
Abnormal serum enzyme level, unspecified
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R75
Billable
Inconclusive laboratory evidence of human immunodeficiency virus [HIV]
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R76
Other abnormal immunological findings in serum
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R76.0
Billable
Raised antibody titer
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R76.1
Billable
Nonspecific reaction to test for tuberculosis
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R76.11
Billable
Nonspecific reaction to tuberculin skin test without active tuberculosis
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R76.12
Billable
Nonspecific reaction to cell mediated immunity measurement of gamma interferon antigen response without active tuberculosis
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R76.8
Billable
Other specified abnormal immunological findings in serum
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R76.9
Billable
Abnormal immunological finding in serum, unspecified
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R77
Other abnormalities of plasma proteins
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R77.0
Billable
Abnormality of albumin
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R77.1
Billable
Abnormality of globulin
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R77.2
Billable
Abnormality of alphafetoprotein
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R77.8
Billable
Other specified abnormalities of plasma proteins
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R77.9
Billable
Abnormality of plasma protein, unspecified
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R78
Findings of drugs and other substances, not normally found in blood
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R78.0
Billable
Finding of alcohol in blood
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R78.1
Billable
Finding of opiate drug in blood
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R78.2
Billable
Finding of cocaine in blood
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R78.3
Billable
Finding of hallucinogen in blood
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R78.4
Billable
Finding of other drugs of addictive potential in blood
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R78.5
Billable
Finding of other psychotropic drug in blood
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R78.6
Billable
Finding of steroid agent in blood
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R78.7
Billable
Finding of abnormal level of heavy metals in blood
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R78.71
Billable
Abnormal lead level in blood
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R78.79
Billable
Finding of abnormal level of heavy metals in blood
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R78.8
Billable
Finding of other specified substances, not normally found in blood
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R78.81
Billable
Bacteremia
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R78.89
Billable
Finding of other specified substances, not normally found in blood
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R78.9
Billable
Finding of unspecified substance, not normally found in blood
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R79
Billable
Other abnormal findings of blood chemistry
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R79.0
Billable
Abnormal level of blood mineral
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R79.1
Billable
Abnormal coagulation profile
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R79.8
Billable
Other specified abnormal findings of blood chemistry
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R79.81
Billable
Abnormal blood-gas level
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R79.82
Billable
Elevated C-reactive protein (CRP)
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R79.83
Billable
Abnormal findings of blood amino-acid level
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R79.89
Billable
Other specified abnormal findings of blood chemistry
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R79.9
Billable
Abnormal finding of blood chemistry, unspecified
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Updates & Changes

FY 2026 Updates

Current Year

Deleted Codes

No codes deleted in this range for FY 2026

No significant changes for FY 2026

This range maintains stability with current coding practices

Historical Changes

  • •FY 2025: Routine maintenance updates with minor terminology clarifications
  • •FY 2024: Enhanced specificity requirements for certain code ranges
  • •FY 2023: Updated documentation guidelines for improved clarity

Upcoming Changes

  • •Proposed updates pending review by Coordination and Maintenance Committee
  • •Under consideration: Enhanced digital health integration codes

Implementation Guidance

  • •Review all FY 2026 updates for R70-R79 codes before implementation
  • •Always verify the most current codes in the ICD-10-CM manual
  • •Ensure clinical documentation supports the selected diagnosis codes
  • +3 more guidance items...

Range Overview

high priority

The R70-R79 range in the ICD-10 code set is designated for abnormal findings on examination of blood, without a confirmed diagnosis. These codes are used when laboratory results indicate abnormal blood findings, but further investigation is needed to determine a definitive diagnosis. The range includes codes for elevated erythrocyte sedimentation rate, abnormal levels of blood substances, and other nonspecific findings on examination of blood.

Key Usage Points:

  • •Use these codes when lab results indicate abnormal blood findings, but a diagnosis is not yet confirmed.
  • •This range includes codes for abnormal levels of blood substances and other nonspecific findings.
  • •These codes are typically used in conjunction with other codes to provide a complete clinical picture.
  • •Always code the confirmed diagnosis when known, rather than the abnormal finding.
  • •Remember to follow up on these codes once a diagnosis is confirmed.

Coding Guidelines

When to Use:

  • ✓When laboratory results indicate abnormal blood findings, but no diagnosis is confirmed.
  • ✓When a patient presents with symptoms that suggest a blood disorder, but lab results are inconclusive.
  • ✓When documenting a patient's medical history that includes unresolved abnormal blood findings.
  • ✓When a patient is undergoing further testing or referral for abnormal blood findings.

When NOT to Use:

  • ✗When a definitive diagnosis has been made.
  • ✗When the abnormal finding is normal for the patient due to a chronic condition.
  • ✗When the abnormal finding is expected due to medication or treatment.
  • ✗When the abnormal finding is not relevant to the patient's current or future health status.

Code Exclusions

Always verify exclusions with the latest ICD-10 guidelines and the patient's medical record.

Documentation Requirements

Documentation for the R70-R79 range should include the specific abnormal finding, the relevant lab results, the patient's symptoms, and any known medical history. It should also note any further testing or referrals planned.

Clinical Information:

  • •Specific abnormal finding
  • •Relevant lab results
  • •Patient's symptoms
  • •Known medical history
  • •Planned further testing or referrals

Supporting Evidence:

  • •Lab reports
  • •Physician's notes
  • •Referral letters
  • •Follow-up visit notes
Good Documentation Example:

Patient presented with fatigue and shortness of breath. CBC shows elevated white blood cell count. Further testing planned to rule out leukemia.

Poor Documentation Example:

Abnormal blood test.

Common Documentation Errors:

  • âš Not specifying the abnormal finding
  • âš Not including relevant lab results
  • âš Not documenting the patient's symptoms
  • âš Not noting planned further testing or referrals

Range Statistics

9
Total Codes
50
Billable
Complexity:
Medium
Primary Use:Clinical Documentation
Chapter:18

Coding Complexity

Medium
Complexity Rating

Coding within the R70-R79 range can be moderately complex due to the need to understand the clinical significance of different abnormal blood findings, and to make judgement calls about their relevance to the patient's health status. Coders also need to stay current with changes to the ICD-10 guidelines for this range.

Key Factors:
  • â–¸Determining whether the abnormal finding is relevant to the patient's health status
  • â–¸Deciding whether to code the abnormal finding or a confirmed diagnosis
  • â–¸Understanding the clinical significance of different abnormal blood findings
  • â–¸Keeping up-to-date with changes to the ICD-10 guidelines for this range

Specialty Focus

The R70-R79 range is particularly relevant to specialties that frequently deal with blood disorders, such as Hematology, Oncology, and Internal Medicine.

Primary Specialties:
Hematology
40%
Oncology
30%
Internal Medicine
30%
Clinical Scenarios:
  • • A patient with a family history of leukemia presents with fatigue and shortness of breath. CBC shows elevated white blood cell count.
  • • A patient on chemotherapy for breast cancer has a blood test showing low red blood cell count.
  • • During a routine check-up, a patient's blood test shows high cholesterol levels.
  • • A patient with a history of anemia has a blood test showing low iron levels.

Resources & References

There are several resources available for coding within the R70-R79 range, including the official ICD-10 guidelines, clinical reference books, and online educational materials.

Official Guidelines:

  • ICD-10-CM Official Guidelines for Coding and Reporting
  • American Health Information Management Association (AHIMA) guidelines
  • American Academy of Professional Coders (AAPC) guidelines

Clinical References:

  • Harrison's Principles of Internal Medicine
  • The Merck Manual of Diagnosis and Therapy

Educational Materials:

  • AAPC's ICD-10 training course
  • AHIMA's online coding resources

Frequently Asked Questions

Can I use a code from the R70-R79 range if a diagnosis is known?

No, once a diagnosis is confirmed, the specific ICD-10 code for that diagnosis should be used instead of the abnormal finding code.