E07.9 ICD-10-CM Code: Disorder of thyroid, unspecified
HCC Buddy Code Card
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FY 2026 Apr update / Endocrine, nutritional and metabolic diseases (E00-E89) / Disorders of thyroid gland (E00-E07)
E07.9
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceDisorder of thyroid, unspecified
A thyroid disorder that has been identified but the specific type or cause has not yet been determined or documented.
Buddy Insight
Disorder of thyroid, unspecified represents the least specific thyroid diagnosis code and indicates that a thyroid abnormality exists but the specific nature has not been documented or determined.
CMS-HCC V28
00
RAF 0
CMS-HCC V24
00
RAF 0
ACA/HHS
00
RAF 0
ESRD/PACE
00
RAF 0
RXHCC
MappedHCC 44
RAF 0.0
Code Trumping
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Code Book Path
Inclusion Terms
OfficialICD-10-CM does not list inclusion terms for E07.9 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for E07.9 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for E07.9 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for E07.9 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for E07.9 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for E07.9 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for E07.9 in this effective period.
Buddy Documentation Tip
MEAT Support
Audit Caution
Common Mistakes
Last updated: FY2026 ICD-10-CM Apr update, Apr 1, 2026 through Sep 30, 2026. CMS-HCC V28 is 100% phased in for payment year 2026.
Is E07.9 an HCC code?
No. E07.9 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
HCC Category Mapping
RAF weights shown are the community, non-dual, aged base weights from the CMS risk adjustment model file. Actual per-patient RAF contribution depends on member segment, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains in use during the transition and for historical data.
MEAT Criteria for E07.9
For E07.9to count as a valid HCC diagnosis in a given encounter, the provider's documentation must show MEAT: Monitor, Evaluate, Assess, or Treat. A diagnosis from a prior year does not carry forward automatically, it has to be re-documented and supported each calendar year.
- MMonitor: signs, symptoms, disease progression, or lab trending documented in the note
- EEvaluate: test results, medication response, or physical findings reviewed by the provider
- AAssess: explicit mention in the assessment or plan with acknowledgment of status
- TTreat: medication, referral, procedure, therapy, or counseling tied to the diagnosis
Only one of M/E/A/T is required to support the code, but the documentation must be specific enough to show that the provider actually addressed E07.9 during that encounter, not just copy-forwarded from a problem list.
What This Code Means
E07.9 is the ICD-10-CM diagnosis code for disorder of thyroid, unspecified. A thyroid disorder that has been identified but the specific type or cause has not yet been determined or documented. E07.9 sits in the ICD-10-CM chapter for endocrine, nutritional and metabolic diseases (e00-e89), within the section covering disorders of thyroid gland (e00-e07).
E07.9 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
Maps to RxHCC 44 (Osteoporosis, Vertebral and Pathological Fractures) in the prescription drug model. This code does not map to CMS-HCC v28 or v24 models. Pursuing specificity is strongly recommended as more precise thyroid diagnoses may carry different risk adjustment implications and ensure accurate resource allocation.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for E07.9 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •This is a placeholder code; work toward a more specific diagnosis with additional testing and documentation
- •Avoid using this code if any more specific thyroid disorder code applies
Clinical Significance
Disorder of thyroid, unspecified represents the least specific thyroid diagnosis code and indicates that a thyroid abnormality exists but the specific nature has not been documented or determined. This code lacks the clinical precision needed for effective treatment planning and should serve as a temporary placeholder during the diagnostic workup phase. Persistent use suggests incomplete documentation or evaluation.
Documentation Requirements
- ✓Document any clinical findings suggesting thyroid disease (examination findings, laboratory abnormalities, symptoms) and the plan for further diagnostic workup.
- ✓Record why a more specific diagnosis has not yet been established and the anticipated timeline for definitive diagnosis.