E74.818 ICD-10-CM Code: Other disorders of glucose transport
E74.818 is not a CMS-HCC payment code. MEAT criteria · RAF calculator · free HCC coding tools
HCC Buddy Code Card
Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.
FY 2026 Apr update / Endocrine, nutritional and metabolic diseases (E00-E89) / Metabolic disorders (E70-E88)
E74.818
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceOther disorders of glucose transport
A rare metabolic disorder affecting how the body transports glucose (sugar) across cell membranes, causing various glucose transport problems not classified elsewhere.
Buddy Insight
Other disorders of glucose transport captures glucose transport defects that do not fit the GLUT1 deficiency category, such as GLUT2 deficiency (Fanconi-Bickel syndrome) or other rare glucose transporter variants.
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
MappedHCC 23
RAF 0.194
ACA/HHS
MappedHCC 28
Varies by metal level
ESRD/PACE
MappedHCC 23
RAF 0.036
RXHCC
MappedHCC 43
RAF 0.063
Code Book Path
Inclusion Terms
Official- (Familial) renal glycosuria
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for E74.818 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for E74.818 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for E74.818 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for E74.818 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for E74.818 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for E74.818 in this effective period.
Buddy Documentation Tip
MEAT Support
Audit Caution
Common Mistakes
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
Is E74.818 an HCC code?
Yes. E74.818 maps to Other Significant Endocrine and Metabolic Disorders under the V24 model but is not retained in V28.
- Code
- E74.818
- Description
- Other disorders of glucose transport
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF
- —
- Billable
- Yes
- Payment year
- 2026
HCC Category Mapping
Each model's RAF is its CMS base weight for that model's standard population, so weights are not directly comparable across models: CMS-HCC V28 and V24 use Community, Non-Dual, Aged; ESRD uses the dialysis continuing-enrollee model; RxHCC is the Part D continuing-enrollee, non-low-income, aged weight (a larger scale than CMS-HCC). ACA/HHS has no single weight — it varies by metal level. 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.
Work E74.818 in the Code Book — tabular path, V28 RAF, and MEAT checklist →
MEAT Criteria for E74.818
For E74.818 to 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 E74.818 during that encounter, not just copy-forwarded from a problem list.
Coder workflow notes
Get the V28 RAF + MEAT cheat sheet
One printable page: confirm a code's V28 HCC status, its RAF weight, and the MEAT your note needs to make it stick. Free, no card.
Free PDF. No card. Unsubscribe anytime.
What This Code Means
E74.818 is the ICD-10-CM diagnosis code for other disorders of glucose transport. A rare metabolic disorder affecting how the body transports glucose (sugar) across cell membranes, causing various glucose transport problems not classified elsewhere. E74.818 sits in the ICD-10-CM chapter for endocrine, nutritional and metabolic diseases (e00-e89), within the section covering metabolic disorders (e70-e88).
Under the older CMS-HCC V24 model, E74.818 maps to Other Significant Endocrine and Metabolic Disorders (HCC 23) with a community, non-dual, aged base RAF weight of 0.194. V28 is the CMS-HCC risk adjustment model that reached 100% phase-in for payment year 2026, replacing V24 which was used during the PY2024–PY2025 transition.
Use this code only when the specific glucose transport disorder is documented but doesn't fit other E74.81x categories. Because E74.818 maps to a payment HCC, the provider's documentation must satisfy MEAT criteria (Monitor, Evaluate, Assess, or Treat) for the encounter to count toward the patient's Medicare Advantage risk adjustment score. When documentation is ambiguous, coders should issue a provider query rather than assume the highest-specificity variant.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for E74.818 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Use this code only when the specific glucose transport disorder is documented but doesn't fit other E74.81x categories
- •Ensure documentation specifies the type of glucose transport defect to support medical necessity
Clinical Significance
Other disorders of glucose transport captures glucose transport defects that do not fit the GLUT1 deficiency category, such as GLUT2 deficiency (Fanconi-Bickel syndrome) or other rare glucose transporter variants. These conditions can cause hepatomegaly, renal tubular dysfunction, and growth failure. Accurate coding of these rare conditions ensures appropriate risk stratification for the specialized care required.
Documentation Requirements
- ✓Specific glucose transport disorder identified by the provider
- ✓Genetic testing or enzyme assay confirming the specific transporter deficiency
- ✓Biochemical findings relevant to the specific disorder (e.g., renal tubular markers, hepatomegaly)
- ✓Clinical manifestations documented including growth parameters and organ involvement
- ✓Current treatment plan and monitoring schedule
Commonly Confused Codes
- •E74.810: Glucose transporter protein type 1 deficiency: GLUT1 has its own specific code
- •E74.819: Disorders of glucose transport, unspecified: use only when no specific transport disorder is identified
- •E74.00-E74.09: Glycogen storage diseases: separate category despite overlapping clinical features
- •N25.0: Renal osteodystrophy: renal tubular dysfunction in Fanconi-Bickel is a manifestation, not the primary code