E1813 HCPCS code: Dynamic adjustable knee extension only device, includes soft interface material
E1813 is the HCPCS Level II code for dynamic adjustable knee extension only device, includes soft interface material. The 2026 Medicare DMEPOS fee schedule pays $142.48 to $222.55 (RR, rental (monthly)) depending on the state. Its Medicare coverage code is C (Carrier judgment): Coverage is decided by the Medicare contractor (MAC) case by case. The NCCI unit limit is 2 per day on DME suppliers. Its average fee ranks 11 of 31 E18 codes billed RR (family range $11.44–$648.01).
Code details
| Field | Value |
|---|---|
| Section | E codes — Durable medical equipment |
| Coverage code | C — Carrier judgment |
| Pricing indicator | 36 — DMEPOS: capped rental item |
| BETOS category | D1E — Other durable medical equipment |
| Added | 2025-01-01 |
| Last action effective | 2025-01-01 |
2026 Medicare DMEPOS fee schedule for E1813
| Modifier | Meaning | Lowest state fee | Highest state fee | Ceiling | Floor |
|---|---|---|---|---|---|
| RR | rental (monthly) | $142.48 | $222.55 | $177.56 | $150.93 |
| State | Modifier | Fee | Rural fee |
|---|---|---|---|
| AK | RR | $222.55 | — |
| AL | RR | $150.93 | — |
| AR | RR | $150.93 | — |
| AZ | RR | $177.56 | — |
| CA | RR | $177.56 | — |
| CO | RR | $150.93 | — |
| CT | RR | $150.93 | — |
| DC | RR | $177.56 | — |
| DE | RR | $166.61 | — |
| FL | RR | $150.93 | — |
| GA | RR | $150.93 | — |
| HI | RR | $197.05 | — |
| IA | RR | $177.56 | — |
| ID | RR | $177.56 | — |
| IL | RR | $177.56 | — |
| IN | RR | $177.56 | — |
| KS | RR | $177.56 | — |
| KY | RR | $150.93 | — |
| LA | RR | $150.93 | — |
| MA | RR | $150.93 | — |
| MD | RR | $177.56 | — |
| ME | RR | $150.93 | — |
| MI | RR | $177.56 | — |
| MN | RR | $177.56 | — |
| MO | RR | $177.56 | — |
| MS | RR | $150.93 | — |
| MT | RR | $174.84 | — |
| NC | RR | $150.93 | — |
| ND | RR | $174.58 | — |
| NE | RR | $177.56 | — |
| NH | RR | $177.56 | — |
| NJ | RR | $160.17 | — |
| NM | RR | $150.93 | — |
| NV | RR | $177.56 | — |
| NY | RR | $165.53 | — |
| OH | RR | $177.56 | — |
| OK | RR | $150.93 | — |
| OR | RR | $177.56 | — |
| PA | RR | $163.61 | — |
| PR | RR | $142.48 | — |
| RI | RR | $150.93 | — |
| SC | RR | $150.93 | — |
| SD | RR | $177.56 | — |
| TN | RR | $150.93 | — |
| TX | RR | $153.50 | — |
| UT | RR | $177.56 | — |
| VA | RR | $177.56 | — |
| VI | RR | $150.93 | — |
| VT | RR | $177.56 | — |
| WA | RR | $177.56 | — |
| WI | RR | $177.56 | — |
| WV | RR | $177.56 | — |
| WY | RR | $177.56 | — |
How the E1813 fee compares
| Measure | Value |
|---|---|
| Rank among 31 E18 codes billed RR (lowest = 1) | 11 |
| Family fee range (average of state fees) | $11.44–$648.01 |
| Rural fee uplift | — |
NCCI unit limits (MUE)
| Claim type | Max units per day | Rationale |
|---|---|---|
| DME suppliers | 2 | Anatomic Consideration |
Medicare policy articles for this code
- A52457: Ankle-Foot/Knee-Ankle-Foot Orthoses - Policy Article (CGS Administrators, LLC (DME MAC) Noridian Healthcare Solutions, LLC (DME MAC)) — mentions this code in its coding guidance
- A52465: Knee Orthoses - Policy Article (CGS Administrators, LLC (DME MAC) Noridian Healthcare Solutions, LLC (DME MAC)) — mentions this code in its coding guidance
Covered diagnoses (4,818 ICD-10-CM codes)
The diagnoses most often listed as covered in the policy articles above:
| ICD-10-CM | Diagnosis | Articles listing it |
|---|---|---|
| A52.16 | Charcot's arthropathy (tabetic) | 1 |
| E08.610 | Diabetes mellitus due to underlying condition with diabetic neuropathic arthropathy | 1 |
| E09.610 | Drug or chemical induced diabetes mellitus with diabetic neuropathic arthropathy | 1 |
| E10.610 | Type 1 diabetes mellitus with diabetic neuropathic arthropathy | 1 |
| E11.610 | Type 2 diabetes mellitus with diabetic neuropathic arthropathy | 1 |
| G04.1 | Tropical spastic paraplegia | 1 |
| G35.A | Relapsing-remitting multiple sclerosis | 1 |
| G35.B0 | Primary progressive multiple sclerosis, unspecified | 1 |
| G35.B1 | Active primary progressive multiple sclerosis | 1 |
| G35.B2 | Non-active primary progressive multiple sclerosis | 1 |
Showing 10 of 4,818. The full list, non-covered diagnoses and CSV export are in Caduvo.
What changed for E1813
- 2026-01-01: Average state fee (RR) rose 2.0%: $164.20 to $167.48
- 2025-01-01: E1813 added to HCPCS Level II
- Next scheduled CMS quarterly update (HCPCS and DMEPOS fee schedule): 2027-01-01
Frequently asked questions
What is HCPCS code E1813?
E1813 is the HCPCS Level II code for dynamic adjustable knee extension only device, includes soft interface material. Short descriptor: "Adjust knee extension device".
How much does Medicare pay for E1813?
Under the 2026 DMEPOS fee schedule, non-rural state fees are RR (rental (monthly)): $142.48–$222.55. Rural fees can be higher.
Does Medicare cover E1813?
Coverage code C — Carrier judgment. Coverage is decided by the Medicare contractor (MAC) case by case.
Which diagnoses support coverage for E1813?
Medicare policy articles that cite E1813 list 4,818 covered ICD-10-CM diagnosis codes across 2 articles. The most cited include A52.16 (Charcot's arthropathy (tabetic)), E08.610 (Diabetes mellitus due to underlying condition with diabetic neuropathic arthropathy), E09.610 (Drug or chemical induced diabetes mellitus with diabetic neuropathic arthropathy). A listed diagnosis is necessary but not sufficient; the policy's other criteria still apply.
Did the Medicare fee for E1813 change in 2026?
The average non-rural state fee for RR moved from $164.20 in 2025 to $167.48 in 2026 (+2.0%). CMS's next quarterly HCPCS and DMEPOS update takes effect January 1, 2027.
How many units of E1813 can be billed per day?
2 on DME suppliers (NCCI medically unlikely edits).
Related E18 codes
- E1800 — Dynamic adjustable elbow extension and flexion device, includes soft interface material ($140.52–$222.55)
- E1801 — Static progressive stretch/patient actualized serial stretch elbow device, extension and/or flexion, with or without range of motion adjustment, includes all components and accessories ($156.28–$215.62)
- E1802 — Dynamic adjustable forearm pronation/supination device, includes soft interface material ($465.75–$558.88)
- E1803 — Dynamic adjustable elbow extension only device, includes soft interface material ($140.52–$222.55)
- E1804 — Dynamic adjustable elbow flexion only device, includes soft interface material ($140.52–$222.55)
- E1805 — Dynamic adjustable wrist extension and flexion device, includes soft interface material ($114.31–$222.55)
- E1806 — Static progressive stretch wrist device, flexion and/or extension, with or without range of motion adjustment, includes all components and accessories ($128.32–$177.02)
- E1807 — Dynamic adjustable wrist extension only device, includes soft interface material ($114.31–$222.55)
- E1808 — Dynamic adjustable wrist flexion only device, includes soft interface material ($114.31–$222.55)
- E1810 — Dynamic adjustable knee extension and flexion device, includes soft interface material ($142.48–$222.55)
- E1811 — Static progressive stretch/patient actualized serial stretch knee device, extension and/or flexion, with or without range of motion adjustment, includes all components and accessories ($162.46–$224.19)
- E1812 — Dynamic knee, extension/flexion device with active resistance control ($122.55–$147.07)
Building a device that would bill under a code like this? Caduvo matches a device description to HCPCS/CPT codes, Medicare coverage and payment, and the FDA pathway in one report.
Next steps
- Run a reimbursement report for a device billed under E1813
- Watch E1813 for fee, coverage and descriptor changes
- Build a full Medicare revenue model for E1813
Sources: CMS HCPCS Level II release October 2025; CMS DMEPOS fee schedule 2026; CMS NCCI MUE tables; CMS Medicare utilization (physician and DME supplier files); CMS Medicare Coverage Database articles. Fees are Medicare allowables, not commercial rates. Not billing or legal advice.