G0306 HCPCS code: Complete cbc, automated (hgb, hct, rbc, wbc, without platelet count) and automated wbc differential count
G0306 is the HCPCS Level II code for complete cbc, automated (hgb, hct, rbc, wbc, without platelet count) and automated wbc differential count. In 2024 Medicare paid an average of $7.60 per service for G0306 across 38,100 services. 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. Medicare volume rose 6% from 2022 to 2024 (36,023 to 38,100 services). In 2024, about 173 clinicians billed Medicare for G0306 for 30,514 beneficiaries; New Jersey, Florida, California accounted for 41% of services.
Code details
| Field | Value |
|---|---|
| Section | G codes — Procedures and professional services (temporary) |
| Coverage code | C — Carrier judgment |
| Pricing indicator | 21 — Priced on the Clinical Laboratory Fee Schedule |
| BETOS category | T1D |
| Added | 2004-01-01 |
| Last action effective | 2009-01-01 |
Who bills G0306 (2024)
| Measure | Value |
|---|---|
| Clinicians billing (by place of service) | 173 |
| Medicare beneficiaries | 30,514 |
| States with claims | 32 |
| Share of services in top 3 states (New Jersey, Florida, California) | 41% |
Counts only. Supplier and clinician names, contact lists and state-by-state detail are in Caduvo.
Medicare utilization for G0306, 2022–2024
| Year | Services | Beneficiaries | Avg. allowed | Avg. paid |
|---|---|---|---|---|
| 2022 | 36,023 | 28,988 | $7.66 | $7.66 |
| 2023 | 42,559 | 34,277 | $7.60 | $7.60 |
| 2024 | 38,100 | 30,514 | $7.60 | $7.60 |
States with the most G0306 services (2024)
| State | Services | Avg. paid |
|---|---|---|
| New Jersey | 6,444 | $7.59 |
| Florida | 5,104 | $7.59 |
| California | 4,061 | $7.61 |
| North Carolina | 3,402 | $7.60 |
| Texas | 3,248 | $7.61 |
NCCI unit limits (MUE)
| Claim type | Max units per day | Rationale |
|---|---|---|
| outpatient hospital claims | 4 | Clinical: Data |
| practitioner claims | 1 | Clinical: Data |
What changed for G0306
- 2004-01-01: G0306 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 G0306?
G0306 is the HCPCS Level II code for complete cbc, automated (hgb, hct, rbc, wbc, without platelet count) and automated wbc differential count. Short descriptor: "Cbc/diffwbc w/o platelet".
How much does Medicare pay for G0306?
In 2024, the average Medicare payment was $7.60 per service (average allowed $7.60).
Does Medicare cover G0306?
Coverage code C — Carrier judgment. Coverage is decided by the Medicare contractor (MAC) case by case.
How many units of G0306 can be billed per day?
4 on outpatient hospital claims; 1 on practitioner claims (NCCI medically unlikely edits).
Related G03 codes
- G0300 — Direct skilled nursing services of a licensed practical nurse (lpn) in the home health or hospice setting, each 15 minutes
- G0302 — Pre-operative pulmonary surgery services for preparation for lvrs, complete course of services, to include a minimum of 16 days of services
- G0303 — Pre-operative pulmonary surgery services for preparation for lvrs, 10 to 15 days of services
- G0304 — Pre-operative pulmonary surgery services for preparation for lvrs, 1 to 9 days of services
- G0305 — Post-discharge pulmonary surgery services after lvrs, minimum of 6 days of services
- G0307 — Complete (cbc), automated (hgb, hct, rbc, wbc; without platelet count)
- G0308 — Creation of subcutaneous pocket with insertion of 180 day implantable interstitial glucose sensor, including system activation and patient training
- G0309 — Removal of implantable interstitial glucose sensor with creation of subcutaneous pocket at different anatomic site and insertion of new 180 day implantable sensor, including system activation
- G0310 — Immunization counseling by a physician or other qualified health care professional when the vaccine(s) is not administered on the same date of service, 5 to 15 mins time (this code is used for medicaid billing purposes)
- G0311 — Immunization counseling by a physician or other qualified health care professional when the vaccine(s) is not administered on the same date of service, 16-30 mins time (this code is used for medicaid billing purposes)
- G0312 — Immunization counseling by a physician or other qualified health care professional when the vaccine(s) is not administered on the same date of service for ages under 21, 5 to 15 mins time (this code is used for medicaid billing purposes)
- G0313 — Immunization counseling by a physician or other qualified health care professional when the vaccine(s) is not administered on the same date of service for ages under 21, 16-30 mins time (this code is used for medicaid billing purposes)
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Next steps
- Run a reimbursement report for a device billed under G0306
- Watch G0306 for fee, coverage and descriptor changes
- Build a full Medicare revenue model for G0306
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.