Service date matters. In the FY2027 release, effective October 1, Z68.1 becomes a category with two more specific adult BMI codes: Z68.18 and Z68.19. The entries below use the April 2026 edition.
No match in this selected set. Open the CDC code browser for the full classification.
Match the documented diagnosis and read the full tabular entry, including parent notes and exclusions. This reference includes all April 2026 E66 entries and adult BMI entries, plus selected diabetes and related codes. Open the full CDC code browser.
Diabetes and prediabetes
Start with the documented diabetes type and complication. This is a selected set: it does not include every diabetes complication, gestational diabetes or drug-induced diabetes. Insulin use alone does not establish type 1 diabetes.
CDC tabular list · April 2026 · Official coding guidelines
Type 2 diabetes mellitus without complications
Type 2 diabetes without documented complications. Check that the record supports this description; the code is not shorthand for every diabetes prescription.
Type 2 diabetes mellitus with hyperglycemia
Hyperglycemia is part of this description. Do not replace it with a complication-free code when the documented diagnosis is more specific.
Type 2 diabetes mellitus with diabetic nephropathy
Diabetic nephropathy and diabetic chronic kidney disease have separate entries. Preserve the documented condition.
Type 2 diabetes mellitus with diabetic chronic kidney disease
Use an additional code to identify the documented CKD stage. Open the CKD stage entries.
Type 2 diabetes mellitus with diabetic neuropathy, unspecified
Type 2 diabetes mellitus with diabetic polyneuropathy
Type 2 diabetes mellitus with diabetic peripheral angiopathy without gangrene
Type 2 diabetes mellitus with other circulatory complications
Type 2 diabetes mellitus with hypoglycemia without coma
Type 2 diabetes mellitus with other specified complication
The tabular entry directs an additional code to identify the complication. It is not a substitute for checking a more specific diabetes entry.
Type 2 diabetes mellitus without complications in remission
This entry specifically names remission. E11.9 excludes this condition; the prescriber’s documentation must establish remission.
Type 1 diabetes mellitus without complications
Type 1 diabetes without complications. Insulin use alone does not establish type 1 diabetes.
Type 1 diabetes mellitus with hyperglycemia
Prediabetes
Obesity and overweight
The E66 entries distinguish cause, obesity class and other specified conditions. Use the provider’s documented diagnosis and class; do not assign a class from BMI alone. The category directs an additional BMI code when known. Pregnancy-related obesity has separate code-first instructions.
CDC tabular list · April 2026 · Official coding guidelines
Morbid (severe) obesity due to excess calories
The description includes “due to excess calories.” Do not treat all obesity codes as synonyms.
Other obesity due to excess calories
Drug-induced obesity
The tabular entry directs an additional adverse-effect code, if applicable, to identify the drug.
Morbid (severe) obesity with alveolar hypoventilation
Includes obesity hypoventilation syndrome. E66.01 excludes obesity with alveolar hypoventilation.
Overweight
Obesity, class 1
Class 1 is stated in the code description. Verify the documented class and the full E66 instructions.
Obesity, class 2
Class 2 is stated in the code description. Verify the documented class and the full E66 instructions.
Obesity, class 3
Class 3 is stated in the code description. Verify the documented class and the full E66 instructions.
Other obesity not elsewhere classified
Obesity, unspecified
An unspecified obesity entry. Check for a more specific documented diagnosis before using it.
Adult BMI
These adult BMI codes apply at age 20 and older. BMI adds detail to an associated reportable diagnosis; it does not establish obesity by itself. The official guidelines describe who may document BMI and when it may be reported. Pediatric BMI uses a different code set.
CDC tabular list · April 2026 · Official coding guidelines
Body mass index [BMI] 19.9 or less, adult
For services from October 1, 2026, use the FY2027 release: Z68.1 is a category with more specific entries Z68.18 and Z68.19.
Body mass index [BMI] 20.0-20.9, adult
Body mass index [BMI] 21.0-21.9, adult
Body mass index [BMI] 22.0-22.9, adult
Body mass index [BMI] 23.0-23.9, adult
Body mass index [BMI] 24.0-24.9, adult
Body mass index [BMI] 25.0-25.9, adult
Body mass index [BMI] 26.0-26.9, adult
Body mass index [BMI] 27.0-27.9, adult
Body mass index [BMI] 28.0-28.9, adult
Body mass index [BMI] 29.0-29.9, adult
Body mass index [BMI] 30.0-30.9, adult
Body mass index [BMI] 31.0-31.9, adult
Body mass index [BMI] 32.0-32.9, adult
Body mass index [BMI] 33.0-33.9, adult
Body mass index [BMI] 34.0-34.9, adult
Body mass index [BMI] 35.0-35.9, adult
Body mass index [BMI] 36.0-36.9, adult
Body mass index [BMI] 37.0-37.9, adult
Body mass index [BMI] 38.0-38.9, adult
Body mass index [BMI] 39.0-39.9, adult
Body mass index [BMI] 40.0-44.9, adult
Body mass index [BMI] 45.0-49.9, adult
Body mass index [BMI] 50.0-59.9, adult
Body mass index [BMI] 60.0-69.9, adult
Body mass index [BMI] 70 or greater, adult
Chronic kidney disease stage
For documented type 2 diabetes with diabetic CKD, E11.22 directs an additional stage code from N18.1–N18.6. N18 also directs coding associated diabetic or hypertensive CKD first. Use the documented stage; this lookup does not convert laboratory results into a diagnosis.
CDC tabular list · April 2026 · Official coding guidelines
Chronic kidney disease, stage 1
Chronic kidney disease, stage 2 (mild)
Chronic kidney disease, stage 3 unspecified
Chronic kidney disease, stage 3a
Chronic kidney disease, stage 3b
Chronic kidney disease, stage 4 (severe)
Chronic kidney disease, stage 5
Stage 5 requiring chronic dialysis is excluded here and classified to N18.6.
End stage renal disease
The tabular entry directs an additional code for dialysis status, if applicable (Z99.2).
Chronic kidney disease, unspecified
No stage is specified by this code. Resolve missing stage documentation rather than choosing a stage from this list.
Long-term medication use
Therapy-status codes add information about medication use. They do not replace the treated condition. The diabetes guidelines distinguish ongoing therapy from temporary insulin use and describe reporting applicable therapy combinations.
CDC tabular list · April 2026 · Official coding guidelines
Long term (current) use of insulin
A long-term insulin-use status code. The official guidelines distinguish ongoing therapy from temporary insulin use during an encounter.
Long term (current) use of oral hypoglycemic drugs
An oral antidiabetic therapy status code; review the underlying diagnosis and applicable additional-code instructions.
Long-term (current) use of injectable non-insulin antidiabetic drugs
An injectable non-insulin antidiabetic therapy status code. It does not identify a brand or establish the condition being treated.
Other pharmacy encounter references
These entries describe an encounter or service context. They are separate from the diabetes and weight-management diagnosis lookup above.
CDC tabular list · April 2026 · Official coding guidelines
Dietary counseling and surveillance
Describes dietary counseling and surveillance. It does not identify a particular weight-loss medication or replace the underlying condition.
Encounter for issue of repeat prescription
Describes an encounter for a repeat prescription. It is not a universal diagnosis for every dispensing event. The tabular list separately references contraceptive repeat prescriptions.
Encounter for immunization
Describes an immunization encounter. It does not identify the vaccine product or administration procedure.
When a claim asks for more
Use the GLP-1 diagnosis and documentation guide for brand-specific context. If the claim returns a diagnosis-field reject, retain the message and check the reject 39 reference and the payer’s current instructions. If the issue is coverage, use the formulary directory.