Common ICD 10 Codes For Functional Medicine

ICD 10 codes for functional medicine Functional medicine diagnosis codes Common ICD 10 chronic fatigue ICD 10 nutritional deficiency codes Root cause medicine ICD 10 ICD 10 hormone imbalance Functional medicine lab diagnosis codes Cloud EHR for functional medicine Best EMR for functional medicine DocVilla functional medicine EMR ICD 10 code fatigue gut hormone Chronic illness ICD 10 codes ICD 10 for autoimmune inflammation Integrative medicine ICD 10 list Custom SOAP templates EHR functional

Introduction

Functional medicine focuses on treating the root cause of disease using a systems-oriented, patient-centered approach. It addresses chronic conditions, nutrient imbalances, hormone dysfunction, GI disturbances, autoimmune conditions, and inflammatory processes through an integrative care model. Whether physicians are creating individualized care plans using diet, lifestyle, nutraceuticals, or bio-identical hormones, appropriate ICD-10 coding is essential for charting, diagnostics, lab ordering, and reimbursement.

Functional medicine practices, whether operating under cash-pay, insurance-based, or hybrid models, need ICD-10 codes that reflect the real complexity of chronic illness. The right EHR software—such as DocVilla—can automate and streamline this documentation process. DocVilla supports functional medicine practices with custom SOAP templates, advanced ICD-10 search, supplement integration, telemedicine, billing, and lab interfaces.

Below is a comprehensive list of common ICD-10 codes used in functional medicine across domains like metabolic health, detoxification, gastrointestinal disorders, neurocognitive symptoms, hormone balance, immune dysregulation, mood health, and environmental exposures.

Chronic Fatigue, Energy Deficiency, and Mitochondrial Dysfunction

  • R53.83 — Other fatigue
  • G93.3 — Postviral fatigue syndrome
  • R53.82 — Chronic fatigue, unspecified
  • G72.81 — Critical illness myopathy
  • E87.1 — Hypo-osmolality and hyponatremia
  • E63.1 — Imbalance of constituents of food intake
  • Z72.3 — Lack of physical exercise
  • F48.0 — Neurasthenia
  • Z71.89 — Other specified counseling

Nutritional Deficiencies and Functional Imbalances

  • E55.9 — Vitamin D deficiency, unspecified
  • E61.1 — Iron deficiency
  • E53.8 — Deficiency of other B group vitamins
  • E52 — Niacin deficiency
  • E50.9 — Vitamin A deficiency
  • E51.9 — Thiamine deficiency
  • E56.9 — Vitamin deficiency, unspecified
  • E58 — Calcium deficiency
  • E63.8 — Other specified nutritional deficiencies
  • Z13.21 — Encounter for screening for nutritional disorder

Gut Health, Microbiome, and Inflammation

  • K58.0 — IBS with diarrhea
  • K58.9 — IBS without diarrhea
  • R19.7 — Diarrhea, unspecified
  • K59.00 — Constipation, unspecified
  • K21.9 — GERD without esophagitis
  • R10.84 — Generalized abdominal pain
  • K90.0 — Celiac disease
  • K90.9 — Intestinal malabsorption
  • K31.89 — Other stomach/duodenal disease
  • R11.2 — Nausea with vomiting

Hormone Dysfunction and Endocrine Imbalance

  • E28.39 — Other ovarian dysfunction
  • E23.0 — Hypopituitarism
  • E29.1 — Testicular hypofunction
  • E34.9 — Endocrine disorder, unspecified
  • E03.9 — Hypothyroidism, unspecified
  • E05.90 — Thyrotoxicosis, unspecified
  • E89.0 — Postprocedural hypothyroidism
  • E66.9 — Obesity, unspecified
  • Z79.890 — Hormone replacement therapy
  • N95.1 — Menopausal and climacteric states

Detoxification, Toxic Burden, and Environmental Medicine

  • T65.91XA — Toxic effect of unspecified substance
  • T50.901A — Poisoning by unspecified drug, accidental
  • R79.89 — Abnormal blood chemistry
  • Z77.098 — Exposure to hazardous environmental conditions
  • Z13.88 — Screening for exposure-related disorders
  • Z57.9 — Occupational exposure to unspecified risk factor
  • T78.40XA — Allergy, unspecified
  • Z91.010 — Peanut allergy
  • T78.2XXA — Anaphylactic reaction, unspecified

Mood Disorders and Cognitive Health

  • F41.9 — Anxiety disorder, unspecified
  • F32.9 — Major depressive disorder, single episode
  • F43.10 — PTSD, unspecified
  • F48.9 — Other specified neurotic disorders
  • F45.42 — Pain disorder with related psychological and medical factors
  • Z63.8 — Other problems with primary support group
  • F06.30 — Mood disorder due to known physiological condition
  • R41.840 — Cognitive communication deficit
  • F07.89 — Other personality and behavioral disorders

Inflammatory and Autoimmune Conditions

  • M35.9 — Systemic connective tissue disorder
  • E31.0 — Autoimmune polyglandular failure
  • M32.9 — SLE, unspecified
  • D89.9 — Immune mechanism disorder, unspecified
  • M05.79 — RA with RF of multiple sites
  • Z92.25 — History of immunosuppressive therapy
  • L40.9 — Psoriasis, unspecified
  • M06.9 — Rheumatoid arthritis, unspecified
  • M45.9 — Ankylosing spondylitis
  • Z83.4 — Family history of autoimmune disease

Metabolic Syndrome and Cardiometabolic Dysfunction

  • E11.9 — Type 2 diabetes without complications
  • R73.03 — Prediabetes
  • E78.5 — Hyperlipidemia, unspecified
  • E78.2 — Mixed hyperlipidemia
  • I10 — Essential hypertension
  • Z13.220 — Screening for lipoid disorders
  • E88.81 — Metabolic syndrome
  • R79.82 — Elevated CRP
  • Z13.6 — Screening for cardiovascular disease
  • E66.01 — Morbid obesity

Pain and Musculoskeletal Syndromes

  • M79.1 — Myalgia
  • M54.5 — Low back pain
  • M25.50 — Pain in unspecified joint
  • M54.2 — Cervicalgia
  • M79.7 — Fibromyalgia
  • M62.81 — Muscle weakness
  • R52 — Pain, unspecified
  • G89.29 — Other chronic pain
  • M54.16 — Lumbar radiculopathy
  • R29.898 — Other symptoms of musculoskeletal system

Sleep Disorders and Circadian Disruption

  • G47.00 — Insomnia, unspecified
  • G47.10 — Hypersomnia, unspecified
  • G47.30 — Sleep apnea, unspecified
  • G47.9 — Sleep disorder, unspecified
  • F51.02 — Adjustment insomnia
  • Z72.820 — Sleep deprivation
  • F51.9 — Sleep disorder not due to substance
  • Z13.828 — Screening for sleep disorders

Lifestyle and Preventive Medicine Codes

  • Z71.3 — Dietary counseling
  • Z71.82 — Exercise counseling
  • Z71.84 — Health behavior and lifestyle counseling
  • Z72.4 — Inappropriate diet and eating habits
  • Z72.3 — Lack of physical exercise
  • Z13.21 — Screening for nutritional disorder
  • Z13.6 — Screening for cardiovascular conditions
  • Z13.228 — Screening for metabolic disorder
  • Z02.89 — Administrative medical exam
  • Z00.00 — Adult general medical exam without abnormal findings

Lab-Driven Conditions and Abnormal Test Findings

  • R79.89 — Other abnormal findings of blood chemistry
  • R74.8 — Abnormal levels of serum enzymes
  • R79.83 — Abnormal blood amino-acid level
  • R79.82 — Elevated CRP
  • R79.0 — Abnormal blood glucose
  • R70.0 — Elevated erythrocyte sedimentation rate
  • R97.2 — Elevated tumor markers
  • Z13.0 — Screening for blood disorders

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