A4618 — Breathing circuits
HCPCS Level II A-code
- Code system
- HCPCS Level II
- Family
- A — Medical & surgical supplies, ambulance
- Medicare coverage status
- Special coverage instructions apply
- DMEPOS payment category
- Inexpensive or routinely purchased
- Prior authorization
- Not on Medicare required-PA list
- Face-to-face & WOPD
- Not on the required list
- MUE unit limit
- 12
- Status
- Active (HCPCS Level II October 2026)
Prior authorization
Not on the Medicare required-PA list (CMS Required Prior Authorization List — 74 items in force on 2026-10-25; 8 more from 2026-10-28; sources: CMS list updated 2026-01-13, CMS-6109-N (91 FR 47972)). Medicare Advantage and commercial plans set their own prior-authorization rules for this code — verify per plan before delivery.
Order readiness — what the written order must contain
Every Medicare DMEPOS claim needs a Standard Written Order with all six elements (42 CFR 410.38(d)):
- Beneficiary name or Medicare Beneficiary Identifier (MBI) (42 CFR 410.38(d)(1)(i)(A))
- General description of the item (42 CFR 410.38(d)(1)(i)(B))
- Quantity to be dispensed, if applicable (42 CFR 410.38(d)(1)(i)(C))
- Order date (42 CFR 410.38(d)(1)(i)(D))
- Treating practitioner name or NPI (42 CFR 410.38(d)(1)(i)(E))
- Treating practitioner signature (42 CFR 410.38(d)(1)(i)(F))
Not on the F2F/WOPD list (CMS Required F2F & WOPD List — 83 items in force on 2026-10-25; 22 more from 2026-10-28; sources: CMS list effective 2026-04-13 (91 FR 1250), CMS-6109-N (91 FR 47972)). The standard written order must reach the supplier before claim submission.
Blank requirements checklist only — MyMedi-AI never collects or stores completed orders.
A4618 Medicare fee schedule (October 2026)
NU — New purchase Inexpensive or routinely purchased
Medicare allowable ranges from $10.78 to $31.06 depending on state and rural status.
Former-CBA payment limits: ceiling $12.68 · floor $10.78
| State | Non-rural | Rural |
|---|---|---|
| AK | $29.04 | — |
| AL | $10.78 | — |
| AR | $12.68 | — |
| AZ | $10.78 | — |
| CA | $12.68 | — |
| CO | $12.68 | — |
| CT | $12.68 | — |
| DC | $12.68 | — |
| DE | $12.68 | — |
| FL | $10.78 | — |
| GA | $11.65 | — |
| HI | $31.06 | — |
| IA | $12.43 | — |
| ID | $10.78 | — |
| IL | $12.68 | — |
| IN | $10.78 | — |
| KS | $12.43 | — |
| KY | $12.68 | — |
| LA | $12.68 | — |
| MA | $12.68 | — |
| MD | $12.68 | — |
| ME | $12.68 | — |
| MI | $12.68 | — |
| MN | $10.97 | — |
| MO | $12.68 | — |
| MS | $10.78 | — |
| MT | $10.78 | — |
| NC | $10.78 | — |
| ND | $12.68 | — |
| NE | $12.43 | — |
| NH | $12.68 | — |
| NJ | $12.68 | — |
| NM | $12.59 | — |
| NV | $10.78 | — |
| NY | $12.68 | — |
| OH | $10.78 | — |
| OK | $12.56 | — |
| OR | $10.91 | — |
| PA | $12.68 | — |
| PR | $13.77 | — |
| RI | $12.68 | — |
| SC | $12.68 | — |
| SD | $12.68 | — |
| TN | $10.78 | — |
| TX | $10.78 | — |
| UT | $12.68 | — |
| VA | $12.68 | — |
| VI | $12.68 | — |
| VT | $12.68 | — |
| WA | $10.91 | — |
| WI | $10.78 | — |
| WV | $10.78 | — |
| WY | $12.68 | — |
RR — Monthly rental Inexpensive or routinely purchased
Medicare allowable ranges from $1.25 to $3.11 depending on state and rural status.
Former-CBA payment limits: ceiling $1.47 · floor $1.25
| State | Non-rural | Rural |
|---|---|---|
| AK | $2.86 | — |
| AL | $1.25 | — |
| AR | $1.47 | — |
| AZ | $1.47 | — |
| CA | $1.47 | — |
| CO | $1.47 | — |
| CT | $1.47 | — |
| DC | $1.47 | — |
| DE | $1.47 | — |
| FL | $1.25 | — |
| GA | $1.25 | — |
| HI | $3.11 | — |
| IA | $1.25 | — |
| ID | $1.25 | — |
| IL | $1.34 | — |
| IN | $1.25 | — |
| KS | $1.25 | — |
| KY | $1.25 | — |
| LA | $1.47 | — |
| MA | $1.47 | — |
| MD | $1.47 | — |
| ME | $1.47 | — |
| MI | $1.47 | — |
| MN | $1.25 | — |
| MO | $1.47 | — |
| MS | $1.25 | — |
| MT | $1.25 | — |
| NC | $1.25 | — |
| ND | $1.47 | — |
| NE | $1.25 | — |
| NH | $1.47 | — |
| NJ | $1.47 | — |
| NM | $1.25 | — |
| NV | $1.47 | — |
| NY | $1.47 | — |
| OH | $1.25 | — |
| OK | $1.25 | — |
| OR | $1.25 | — |
| PA | $1.47 | — |
| PR | $1.69 | — |
| RI | $1.47 | — |
| SC | $1.25 | — |
| SD | $1.47 | — |
| TN | $1.25 | — |
| TX | $1.25 | — |
| UT | $1.47 | — |
| VA | $1.47 | — |
| VI | $1.47 | — |
| VT | $1.47 | — |
| WA | $1.25 | — |
| WI | $1.25 | — |
| WV | $1.25 | — |
| WY | $1.47 | — |
UE — Used purchase Inexpensive or routinely purchased
Medicare allowable ranges from $8.08 to $23.31 depending on state and rural status.
Former-CBA payment limits: ceiling $9.51 · floor $8.08
| State | Non-rural | Rural |
|---|---|---|
| AK | $21.80 | — |
| AL | $8.08 | — |
| AR | $9.51 | — |
| AZ | $8.08 | — |
| CA | $9.51 | — |
| CO | $9.51 | — |
| CT | $9.51 | — |
| DC | $9.51 | — |
| DE | $9.51 | — |
| FL | $8.08 | — |
| GA | $8.79 | — |
| HI | $23.31 | — |
| IA | $9.33 | — |
| ID | $8.08 | — |
| IL | $9.51 | — |
| IN | $8.08 | — |
| KS | $9.33 | — |
| KY | $9.51 | — |
| LA | $9.51 | — |
| MA | $9.51 | — |
| MD | $9.51 | — |
| ME | $9.51 | — |
| MI | $9.51 | — |
| MN | $8.18 | — |
| MO | $9.51 | — |
| MS | $8.08 | — |
| MT | $8.08 | — |
| NC | $8.08 | — |
| ND | $9.51 | — |
| NE | $9.33 | — |
| NH | $9.51 | — |
| NJ | $9.51 | — |
| NM | $9.44 | — |
| NV | $8.08 | — |
| NY | $9.51 | — |
| OH | $8.08 | — |
| OK | $9.41 | — |
| OR | $8.16 | — |
| PA | $9.51 | — |
| PR | $10.36 | — |
| RI | $9.51 | — |
| SC | $9.51 | — |
| SD | $9.51 | — |
| TN | $8.08 | — |
| TX | $8.08 | — |
| UT | $9.51 | — |
| VA | $9.51 | — |
| VI | $9.51 | — |
| VT | $9.51 | — |
| WA | $8.16 | — |
| WI | $8.08 | — |
| WV | $8.08 | — |
| WY | $9.51 | — |
Unit limit (MUE)
Medicare's Medically Unlikely Edit caps A4618 at 12 units per date of service (clinical). Units above the MUE deny — typically as CO-151. Rationale: Nature of Equipment.
Common denial codes to watch
Related A-codes
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