J7665 — Mannitol, administered through an inhaler, 5 mg
J7665 is a HCPCS Level II code for mannitol, administered through an inhaler, 5 mg. It belongs to the Drugs Administered Other Than Oral Method section. Whether Medicare pays it depends on the coverage rule below.
Medicare coverage: Carrier judgment
Coverage is decided by your Medicare contractor, not by national policy. Whether this is paid depends on the LCD for your jurisdiction and on what the documentation supports.
From the coverage field of the CMS Alpha-Numeric HCPCS File, release 2026Q3-Jul. This states Medicare’s position on the code, not on your particular claim.
Physician fee schedule statusE
Excluded from the physician fee schedule by regulation. Payment, where it exists, comes from another fee schedule (drugs via ASP, supplies via DMEPOS, and so on).
Global period: XXX
Want the dollar amount for your locality? The fee calculator applies your GPCI and the current conversion factor.
Medically Unlikely Edits — units per day
The most units of J7665 Medicare will pay on one date of service. Bill more on a single line and it is denied. The limit is not the same in every setting, so the row that matters is the one matching the claim you are building.
- practitioner
- 127 units MAI 3 — Date of Service Edit: Clinical · Prescribing Information
- outpatient
- 127 units MAI 3 — Date of Service Edit: Clinical · Prescribing Information
- DME supplier
- 127 units MAI 3 — Date of Service Edit: Clinical · Prescribing Information
The adjudication indicator decides whether exceeding the limit is worth appealing at all: MAI 1 is a line edit you can support with documentation, MAI 3 is a date-of-service edit that is also appealable, and MAI 2 is absolute — no documentation overrides it. CMS MUE 2026Q3.
The CMS record for J7665
- Long descriptor
- Mannitol, administered through an inhaler, 5 mg
- Short descriptor
- Mannitol for inhaler
- Added
- January 1, 2012
- BETOS
- O1E
- Pricing indicator
- 51 — Other
The official wording. This is what the code means.
CMS's 28-character form, which is what shows up on a remittance advice.
When CMS introduced the code.
Berenson-Eggers Type of Service — CMS's own analytic grouping.
Drugs.
Codes adjacent to J7665
HCPCS has no hierarchy — related items simply sit next to each other in the numbering. If J7665 is not quite right, the correct code is very often within a few positions of it.
- J7647Isoetharine hcl, inhalation solution, compounded product, administered through dme, concentrated form, per milligram
- J7648Isoetharine hcl, inhalation solution, fda-approved final product, non-compounded, administered through dme, concentrated form, per milligram
- J7649Isoetharine hcl, inhalation solution, fda-approved final product, non-compounded, administered through dme, unit dose form, per milligram
- J7650Isoetharine hcl, inhalation solution, compounded product, administered through dme, unit dose form, per milligram
- J7657Isoproterenol hcl, inhalation solution, compounded product, administered through dme, concentrated form, per milligram
- J7658Isoproterenol hcl, inhalation solution, fda-approved final product, non-compounded, administered through dme, concentrated form, per milligram
- J7659Isoproterenol hcl, inhalation solution, fda-approved final product, non-compounded, administered through dme, unit dose form, per milligram
- J7660Isoproterenol hcl, inhalation solution, compounded product, administered through dme, unit dose form, per milligram
- J7667Metaproterenol sulfate, inhalation solution, compounded product, concentrated form, per 10 milligrams
- J7668Metaproterenol sulfate, inhalation solution, fda-approved final product, non-compounded, administered through dme, concentrated form, per 10 milligrams
- J7669Metaproterenol sulfate, inhalation solution, fda-approved final product, non-compounded, administered through dme, unit dose form, per 10 milligrams
- J7670Metaproterenol sulfate, inhalation solution, compounded product, administered through dme, unit dose form, per 10 milligrams
- J7674Methacholine chloride administered as inhalation solution through a nebulizer, per 1 mg
- J7676Pentamidine isethionate, inhalation solution, compounded product, administered through dme, unit dose form, per 300 mg
- J7677Revefenacin inhalation solution, fda-approved final product, non-compounded, administered through dme, 1 microgram
- J7680Terbutaline sulfate, inhalation solution, compounded product, administered through dme, concentrated form, per milligram
Questions about J7665
What is HCPCS code J7665?
J7665 is a HCPCS Level II code for mannitol, administered through an inhaler, 5 mg. It sits in the Drugs Administered Other Than Oral Method section.
Does Medicare cover J7665?
The CMS HCPCS file marks J7665 as "Carrier judgment". Coverage is decided by your Medicare contractor, not by national policy. Whether this is paid depends on the LCD for your jurisdiction and on what the documentation supports.
How is J7665 paid under the physician fee schedule?
J7665 carries PFS status code E. Excluded from the physician fee schedule by regulation. Payment, where it exists, comes from another fee schedule (drugs via ASP, supplies via DMEPOS, and so on).