The personal history of anemia ICD-10 code is Z86.2, “Personal history of diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism.” It is used when a patient had anemia in the past, the anemia has resolved, and it is no longer being treated, but the history still matters to current care. If the anemia is still present or still being treated, you code the active anemia from the D50–D64 range instead.
That single distinction, past versus current, is where most coding errors happen. This guide explains when Z86.2 applies, how it relates to the active anemia codes, and how clinicians can document so the record is accurate. For a broader view of the classification, see our overview of the history of anemia and its ICD-10 classification.
What Does “Personal History of Anemia” Mean?
Anemia is a reduction in red blood cells or hemoglobin that lowers the blood’s ability to carry oxygen. Common reference cut-offs are a hemoglobin below about 13 g/dL in adult men and below about 12 g/dL in non-pregnant adult women, though laboratories vary.
In ICD-10, “Z” codes describe factors that influence health status rather than current diseases. A personal history code records that a condition existed before and may affect today’s decisions. For anemia, this can explain why a clinician orders a repeat blood count, checks iron studies before surgery, or screens for recurrence in someone with ongoing risk factors.
Z86.2 Versus Active Anemia Codes
The key question when coding is simple: does the patient have anemia, or receive treatment for it, today?
| Clinical situation | Correct coding approach |
|---|---|
| Iron deficiency anemia treated last year; normal counts now; no ongoing iron | Z86.2 (personal history) |
| Iron deficiency anemia still on oral iron therapy | Active code, e.g. D50.9 (iron deficiency anemia, unspecified) |
| Vitamin B12 deficiency on lifelong B12 injections (e.g. pernicious anemia) | Active code from D51 (vitamin B12 deficiency anemia) |
| Anemia of chronic kidney disease, current | D63.1 with the kidney disease code |
| Anemia caused by chemotherapy, current | D64.81 with the cancer code; see chemo-induced anemia ICD-10 coding |
| Inherited anemia such as sickle cell disease or thalassemia | Always coded as active (D57 or D56), as the condition is lifelong |
Z86.2 therefore suits resolved, acquired anemias. Lifelong inherited conditions are not “history”; they remain active diagnoses even when a patient feels well. Code descriptors above follow ICD-10-CM; the WHO version of ICD-10 used in some countries differs in places, so always confirm against your current code set.
Where Anemia Sits in ICD-10
Active anemias fall in Chapter 3, codes D50–D64, grouped by cause. A fuller breakdown is in our anemia ICD-10 guide.
- D50–D53, nutritional anemias: iron, vitamin B12, folate, and other deficiencies.
- D55–D59, hemolytic anemias: including thalassemia (D56) and sickle cell disorders (D57).
- D60–D64, aplastic and other anemias: including aplastic anemia, acute blood-loss anemia (D62), and anemia in chronic disease.
Related “Z” codes include family history of blood diseases (Z83.2), which is different from a personal history and is common with inherited blood disorders.
Why a Past Anemia Still Matters Clinically
Anemia often has a cause that can return. In my practice, a documented history changes how I approach a patient in several ways:
- Recurrence risk: iron deficiency from heavy periods, ongoing gut blood loss, or a restrictive diet can come back once supplements stop.
- Before surgery or pregnancy: a prior anemia prompts earlier blood counts and iron studies so deficiency can be corrected in advance.
- Unexplained past anemia: if the original cause was never found, a recurrence may warrant further tests, including gut investigations or, rarely, a look at the bone marrow.
- Childhood marrow disorders: survivors of conditions such as pediatric aplastic anemia need long-term monitoring even after counts recover.
Symptoms that suggest anemia has returned
Patients with a history of anemia should know the warning signs, because early recurrence is easy to treat. Watch for:
- Tiredness or weakness out of proportion to activity
- Pale skin, lips, or inner eyelids
- Breathlessness, a racing heartbeat, or dizziness on exertion
- Headaches, poor concentration, or cold hands and feet
- Cravings for ice or non-food items, a classic clue to iron deficiency
If these return, a complete blood count with red cell indices such as the mean corpuscular volume (MCV) is the first test. Small red cells point toward iron deficiency, and large red cells toward vitamin B12 or folate deficiency. At that point the diagnosis is active again, and the code changes with it.
Documentation Tips for Accurate Coding
Coders can only assign what the clinical note supports. Clear documentation prevents both under-coding and over-coding.
- State the status: “resolved,” “in remission,” or “ongoing.” Avoid leaving an old anemia on the problem list without comment.
- Name the type: “history of iron deficiency anemia due to menorrhagia, resolved 2024” is far more useful than “history of anemia.”
- Record current treatment: if the patient still takes iron, B12, or folate for the anemia, it is active, not history.
- Link causes: connect anemia to its underlying condition, such as chronic kidney disease or cancer therapy, when that link exists.
- Update at each visit: a condition can move from active to history as counts normalize and treatment stops.
Key Takeaways
- Personal history of anemia is coded with Z86.2 in ICD-10.
- Use Z86.2 only when anemia has resolved and is no longer being treated.
- Current or treated anemia takes an active code from D50–D64.
- Inherited anemias like sickle cell disease and thalassemia remain active codes for life.
- Specific, dated documentation of type, cause, and status is what makes coding accurate.
For patient-friendly background on causes, symptoms, and treatment, see our anemia guide.
Frequently Asked Questions
What is the ICD-10 code for personal history of anemia?
It is Z86.2, which covers a personal history of diseases of the blood and blood-forming organs. It applies when the anemia has resolved and no longer needs treatment.
Can I use Z86.2 if the patient is still taking iron tablets?
Generally no. Ongoing treatment means the condition is still being managed, so the active anemia code, such as D50.9 for iron deficiency anemia, is more appropriate. Once treatment stops and counts are normal, Z86.2 can be used.
Is sickle cell anemia ever coded as personal history?
No. Sickle cell disease is a lifelong inherited condition, so it is always coded with an active code from D57, even between crises. The same applies to thalassemia under D56.
Does a history of anemia in a past pregnancy count?
If anemia occurred during a previous pregnancy and has since resolved without ongoing treatment, it can be recorded as a personal history. Anemia during a current pregnancy is coded differently, within the pregnancy chapter, so the timing should be clear in the notes.
What is the difference between personal and family history of anemia codes?
A personal history code (Z86.2) means the patient had the condition. A family history code (Z83.2) means a relative had a blood disease, which may raise the patient’s own risk, particularly for inherited disorders.
