G0146 HCPCS code: Principal illness navigation - peer support, additional 30 minutes per calendar month (list separately in addition to g0140)
G0146 is the HCPCS Level II code for principal illness navigation - peer support, additional 30 minutes per calendar month (list separately in addition to g0140). Its Medicare coverage code is C (Carrier judgment): Coverage is decided by the Medicare contractor (MAC) case by case. The NCCI unit limit is 4 per day on outpatient hospital claims.
Code details
| Field | Value |
|---|---|
| Section | G codes — Procedures and professional services (temporary) |
| Coverage code | C — Carrier judgment |
| Pricing indicator | 13 |
| BETOS category | M5D |
| Added | 2024-01-01 |
| Last action effective | 2024-01-01 |
NCCI unit limits (MUE)
| Claim type | Max units per day | Rationale |
|---|---|---|
| outpatient hospital claims | 4 | Code Descriptor / CPT Instruction |
| practitioner claims | 4 | Code Descriptor / CPT Instruction |
What changed for G0146
- 2024-01-01: G0146 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 G0146?
G0146 is the HCPCS Level II code for principal illness navigation - peer support, additional 30 minutes per calendar month (list separately in addition to g0140). Short descriptor: "Nav srv peer sup add 30 pr m".
Does Medicare cover G0146?
Coverage code C — Carrier judgment. Coverage is decided by the Medicare contractor (MAC) case by case.
How many units of G0146 can be billed per day?
4 on outpatient hospital claims; 4 on practitioner claims (NCCI medically unlikely edits).
Related G01 codes
- G0101 — Cervical or vaginal cancer screening; pelvic and clinical breast examination
- G0102 — Prostate cancer screening; digital rectal examination
- G0103 — Prostate cancer screening; prostate specific antigen test (PSA)
- G0104 — Colorectal cancer screening; flexible sigmoidoscopy
- G0105 — Colorectal cancer screening; colonoscopy on individual at high risk
- G0106 — Colorectal cancer screening; alternative to g0104, screening sigmoidoscopy, barium enema
- G0108 — Diabetes outpatient self-management training services, individual, per 30 minutes
- G0109 — Diabetes outpatient self-management training services, group session (2 or more), per 30 minutes
- G0117 — Glaucoma screening for high risk patients furnished by an optometrist or ophthalmologist
- G0118 — Glaucoma screening for high risk patient furnished under the direct supervision of an optometrist or ophthalmologist
- G0120 — Colorectal cancer screening; alternative to g0105, screening colonoscopy, barium enema.
- G0121 — Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk
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Next steps
- Run a reimbursement report for a device billed under G0146
- Watch G0146 for fee, coverage and descriptor changes
- Build a full Medicare revenue model for G0146
Sources: CMS HCPCS Level II release October 2026; CMS DMEPOS fee schedule; 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.