G8421 HCPCS Level II code: Bmi not documented and no reason is given
G8421 is the HCPCS code for “Bmi not documented and no reason is given” in CMS’s October 2026 release, in effect from Oct 1, 2026.
Official description
G8421Bmi not documented and no reason is given
Short description: Bmi not calculated
HCPCS · United States
Medicare details
The indicators CMS publishes with G8421 in its October 2026 file. They describe Medicare’s handling, not another payer’s.
- Medicare coverage
- Carrier judgment
- Medicare pricing
- Service not separately priced by Part B (e.g., services not covered, bundled, used by Part A only, etc.)
- Type of service
- Medical care
- BETOS category
- Specialist - other
- Added
- Jan 1, 2008
Where G8421 sits
- 1G codesProcedures and professional services
- 2Active code G8421Bmi not documented and no reason is given
Source and release
- Data release
- HCPCS Level II · October 2026
- Effective date
- Oct 1, 2026
- Publisher
- CMS
This page is built from the HCPCS Level II catalog that Vero Codes reads when it suggests codes: Centers for Medicare & Medicaid Services’s October 2026 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
What does HCPCS code G8421 mean?
G8421 is the HCPCS code for “Bmi not documented and no reason is given” in CMS’s HCPCS Level II October 2026 release.
Does Medicare cover G8421?
CMS lists G8421’s Medicare coverage as “Carrier judgment” and its pricing as “Service not separately priced by Part B (e.g., services not covered, bundled, used by Part A only, etc.)”. Coverage and payment still depend on the patient, the setting, the documentation and the payer.
Which HCPCS Level II release does this page use?
It uses CMS’s October 2026 release, in effect from Oct 1, 2026 to Dec 31, 2026. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.
Codes beside G8421
All G codesG8415Footwear evaluation was not performedG8416Clinician documented that patient was not an eligible candidate for footwear evaluation measureG8417Bmi is documented above normal parameters and a follow-up plan is documentedG8418Bmi is documented below normal parameters and a follow-up plan is documentedG8419Bmi documented outside normal parameters, no follow-up plan documented, no reason givenG8420Bmi is documented within normal parameters and no follow-up plan is requiredG8422Bmi not documented, documentation the patient is not eligible for bmi calculationG8427Eligible clinician attests to documenting in the medical record they obtained, updated, or reviewed the patient's current medicationsG8428Current list of medications not documented as obtained, updated, or reviewed by the eligible clinician, reason not givenG8430Documentation of a medical reason(s) for not documenting, updating, or reviewing the patient's current medications list (e.g., patient is in an acute health crisis where time is…G8431Screening for depression is documented as being positive and a follow-up plan is documentedG8432Depression screening not documented, reason not given