A7018 — Water, distilled, used with large volume nebulizer, 1000 ml
HCPCS Level II A-code · short descriptor: “Water distilled w/nebulizer”
- Code system
- HCPCS Level II
- Family
- A — Medical & surgical supplies, ambulance
- Medicare coverage status
- Carrier judgment — coverage decided by the DME MAC
- DMEPOS payment category
- Supplies
- Prior authorization
- Not on Medicare required-PA list
- Status
- Active (April 2026 HCPCS)
Prior authorization
Not on the Medicare required-PA list as of the January 13, 2026 update (74 items). Medicare Advantage and commercial plans set their own prior-authorization rules for this code — verify per plan before delivery.
A7018 Medicare fee schedule (April 2026)
Base (no modifier) Supplies
Medicare allowable ranges from $0.38 to $0.59 depending on state and rural status.
| State | Non-rural | Rural |
|---|---|---|
| AK | $0.56 | — |
| AL | $0.41 | $0.45 |
| AR | $0.41 | $0.45 |
| AZ | $0.38 | $0.49 |
| CA | $0.39 | $0.49 |
| CO | $0.39 | $0.45 |
| CT | $0.43 | $0.49 |
| DC | $0.41 | $0.49 |
| DE | $0.41 | $0.49 |
| FL | $0.41 | $0.45 |
| GA | $0.41 | $0.45 |
| HI | $0.59 | — |
| IA | $0.39 | $0.49 |
| ID | $0.39 | $0.49 |
| IL | $0.44 | $0.49 |
| IN | $0.44 | $0.49 |
| KS | $0.39 | $0.49 |
| KY | $0.41 | $0.45 |
| LA | $0.41 | $0.45 |
| MA | $0.43 | $0.49 |
| MD | $0.41 | $0.49 |
| ME | $0.43 | $0.49 |
| MI | $0.44 | $0.49 |
| MN | $0.39 | $0.49 |
| MO | $0.39 | $0.49 |
| MS | $0.41 | $0.45 |
| MT | $0.39 | $0.49 |
| NC | $0.41 | $0.45 |
| ND | $0.39 | $0.49 |
| NE | $0.39 | $0.49 |
| NH | $0.43 | $0.49 |
| NJ | $0.41 | $0.49 |
| NM | $0.38 | $0.45 |
| NV | $0.39 | $0.49 |
| NY | $0.41 | $0.49 |
| OH | $0.44 | $0.49 |
| OK | $0.38 | $0.45 |
| OR | $0.39 | $0.49 |
| PA | $0.41 | $0.49 |
| PR | $0.40 | — |
| RI | $0.43 | $0.49 |
| SC | $0.41 | $0.45 |
| SD | $0.39 | $0.49 |
| TN | $0.41 | $0.45 |
| TX | $0.38 | $0.45 |
| UT | $0.39 | $0.49 |
| VA | $0.41 | $0.49 |
| VI | $0.49 | — |
| VT | $0.43 | $0.49 |
| WA | $0.39 | $0.49 |
| WI | $0.44 | $0.49 |
| WV | $0.41 | $0.49 |
| WY | $0.39 | $0.49 |
Amounts are the Medicare DMEPOS fee-schedule allowables effective April 2026.
Medicare typically pays 80% of the allowable after the Part B deductible; the patient owes 20%.
A 2% sequestration reduction applies to the Medicare share. Former competitive-bidding-area
adjustments and non-continental rates can differ — verify with your DME MAC.
Common denial codes to watch
Related A-codes
Bill A7018 with confidence
MyMedi-AI scrubs whole claims against NCCI pairs, MUE limits, modifier rules, and PA flags before you submit — built for DME teams, no PHI stored on our servers.
Start free trial Run a CMS-0057-F readiness checkPrefer DIY compliance? Self-audit documentation kits for DME suppliers →