This reference uses VA rating codes. For a code from a medical record, check ICD-10-CM and the service date. A clinical code alone does not establish a VA rating or a matching VA diagnostic code.
Essential thrombocythemia and primary myelofibrosis
Hemic and lymphatic · 38 CFR § 4.117
Diagnostic Code 7718 is the VASRD entry for Essential thrombocythemia and primary myelofibrosis. VA applies the controlling criteria, shared formulas, and special instructions shown in 38 CFR Part 4. VMC presents this material for education and reference; it does not determine a Veteran's diagnosis, service connection, or evaluation.
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Source-verified VASRD criteria
How VA rates this diagnostic code
These percentages summarize the regulatory criteria already mapped to this diagnostic code. They do not predict a Veteran's individual evaluation or establish service connection.
Requiring either continuous myelosuppressive therapy, or, for six months following hospital admission for any of the following treatments: peripheral blood or bone marrow stem cell transplant, or chemotherapy, or interferon treatment
Requiring continuous or intermittent myelosuppressive therapy, or chemotherapy, or interferon treatment to maintain platelet count <500 × 10 9 /L
Requiring continuous or intermittent myelosuppressive therapy, or chemotherapy, or interferon treatment to maintain platelet count of 200,000-400,000, or white blood cell (WBC) count of 4,000-10,000
Asymptomatic
Regulatory notes
- Note (1): If the condition undergoes leukemic transformation, evaluate as leukemia under diagnostic code 7703.
- Note (2): A 100 percent evaluation shall be assigned as of the date of hospital admission for peripheral blood or bone marrow stem cell transplant; or during the period of treatment with chemotherapy (including myelosuppressants) or interferon treatment. Six months following hospital discharge or, in the case of chemotherapy treatment, six months after completion of treatment, the appropriate disability rating shall be determined by mandatory VA examination. Any reduction in evaluation based upon that or any subsequent examination shall be subject to the provisions of § 3.105(e) of this chapter.
Body system and anatomy metadata
Body system: Hemic and lymphatic
Anatomy / region tags: hematologic
These tags support discovery and body-map compatibility. They do not establish Veteran-specific laterality or entitlement.
Official VA DBQ references
DBQ catalog: va-dbq-2026.09.16 · Retrieved 2026-09-16. Official VA inventory ↗
- Hematologic and Lymphatic Conditions, Including Leukemia ↗ Related resourceCatalog category: Hematologic & Lymphatic
Related by body system only. No reviewed condition-specific form match or requirement has been established.
VA maintains some examination forms that are not available for public use. VMC does not infer a one-code-to-one-DBQ relationship.
Evidence information
When reviewing the criteria, useful evidence categories can include diagnosis and treatment records, objective testing identified by the schedule, documented frequency/duration/severity when the criteria use those concepts, and functional effects described in medical or lay evidence. The relevant evidence depends on the actual claim and medical facts.
VMC does not diagnose conditions, guarantee a percentage, or advise anyone to exaggerate symptoms.
Legal basis and source identification
38 CFR § 4.117 · Source current through 2026-08-06 · Verified 2026-08-10
Registry content release: vasrd-registry-2026.08.1