Monocytes · high result
What does a high Monocytes mean?
Short answer
A high monocyte count (monocytosis) reflects chronic inflammation or the recovery phase of an infection — tuberculosis, endocarditis, autoimmune disease, inflammatory bowel disease and recovery from neutropenia all raise it. Persistent unexplained monocytosis, especially with other abnormal counts, is evaluated for myelodysplastic or chronic myelomonocytic disorders.
Medically reviewed by Youmna DiStefano, MD · Last reviewed September 2026
What is the normal range for Monocytes?
- age 18+: 2.00 – 8.00 %
Full reference table, citations and testing options: Monocytes biomarker page.
What are the common causes of high Monocytes?
- Chronic infections: tuberculosis, endocarditis, brucellosis, syphilis
- Autoimmune and inflammatory disease, inflammatory bowel disease, sarcoidosis
- Recovery from acute infection or chemotherapy
- Smoking, chronic stress
- Chronic myelomonocytic leukemia, myelodysplasia, lymphoma (rare; persistent)
What symptoms go with high Monocytes?
- Usually none
- Fever, fatigue, weight loss with a chronic infection or inflammatory disease
What do clinicians usually check next?
- Repeat CBC with differential in 4–6 weeks
- CRP/ESR; targeted infection or autoimmune tests
- Peripheral smear and hematology review if persistent
Follow-up tests available at TestWell: CBC (Complete Blood Count) ($21.99), Body Inflammation Test (ESR) ($18.99), C-Reactive Protein (CRP) ($26.99), Sed Rate (ESR) ($24.99).
How do you recheck Monocytes?
Prices are cash-pay; every order adds one $6 lab processing fee. Physician authorization is included; no insurance or referral needed.
| Test or panel | Type | Price | Fasting | Results |
|---|---|---|---|---|
| General Wellness Panel | Panel · 4 tests | $89.99 | Yes | 1–3 business days |
| Blood Clotting Panel | Panel · 4 tests | $149.99 | No | 3–7 business days |
| Baseline Anemia Panel | Panel · 5 tests | $74.99 | Yes | 2–4 business days |
| CBC with Differential | Test · 14 biomarkers | $21.99 | No | 1–3 business days |
Common questions
What monocyte level is too high?
Above about 0.8–1.0 × 10³/µL absolute (roughly over 8–10%). One mildly high value after an infection is expected; the same value three months later is what gets investigated.
Sources
Educational content, not a diagnosis. Lab results are one input; a clinician interprets them with your history and exam.