What is a normal C-Reactive Protein level?

The normal reference range for C-Reactive Protein is < 1.0 mg/dL (< 10 mg/L). (SI: < 10 mg/L.) Reference ranges vary slightly by laboratory — always use your facility's range.

C-Reactive Protein (CRP)

Q: When should a nurse call the provider about C-Reactive Protein?

Escalate the clinical source, not the number — a rising CRP with a worsening patient strengthens your SBAR.

Inflammatory

Normal range

< 1.0 mg/dL (< 10 mg/L)

SI: < 10 mg/L

☎ When to call

Escalate the clinical source, not the number — a rising CRP with a worsening patient strengthens your SBAR.

What you do

Nonspecific smoke alarm — it says 'inflammation somewhere', not where
Most useful as a trend: falling CRP supports antibiotic response

Causes of HIGH c-reactive protein

Any inflammation: infection, autoimmune flare, post-opMI, malignancy

Causes of LOW c-reactive protein

Normal — good

Source: Pagana, Mosby's Manual of Diagnostic and Laboratory Tests, 7th ed.Reference only — verify against your facility's policy.

C-Reactive Protein (CRP)

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