Billing Intensive Behavioral Therapy for obesity: G0447, G0473, and the incident-to requirement.
Obesity IBT looks like a standard nutrition counseling benefit until you check who's allowed to bill it directly — and the answer isn't the dietitian actually doing the counseling in most cases. NCD 210.12 names a primary care physician or NPP as the qualified furnishing provider, which flips this code family's provider-status rule in the opposite direction from MNT. This guide covers G0447/G0473 eligibility, the tiered visit schedule and its 3kg gate, and the incident-to mechanics that trip up practices running both benefits out of the same clinic.
Key takeaways
- Eligibility is BMI ≥ 30 kg/m², measured, not self-reported. A patient-reported height and weight, or an outdated chart value, doesn't satisfy NCD 210.12's documentation standard.
- The visit schedule is tiered and contingent, not flat. Weekly for month 1, every other week for months 2–6, then monthly for months 7–12 — but only if the beneficiary lost at least 3kg over the first six months, reassessed and charted at that visit.
- An RD is not a qualified furnishing provider under NCD 210.12. When a dietitian delivers the counseling, it's billed incident-to a physician or NPP in a non-facility primary care setting — the opposite of MNT, which an RDN bills directly and can never bill incident-to.
- A missed 3kg threshold isn't a coverage cutoff. It triggers a readiness-and-BMI reassessment after another six months, not termination of the benefit.
G0447 and G0473: the code family
Obesity IBT bills under two HCPCS Level II codes, both governed by NCD 210.12 (Intensive Behavioral Therapy for Obesity, effective 11/29/2011) — retrieved and quoted directly from the CMS Coverage Database for this guide, not paraphrased from a secondary source.
| Code | Service | Unit |
|---|---|---|
G0447 | Face-to-face behavioral counseling for obesity, individual | 15 min |
G0473 | Face-to-face behavioral counseling for obesity, group of 2–10 | 30 min |
NCD 210.12 defines the covered intervention as three components: screening for obesity using BMI calculated from measured weight and height; a dietary (nutritional) assessment; and intensive behavioral counseling and therapy to promote sustained weight loss through high-intensity diet and exercise interventions. The intervention has to follow the USPSTF's 5-A framework — Assess, Advise, Agree, Assist, Arrange — a structure worth building directly into the visit template and note format, because a visit that doesn't touch all five isn't clearly the covered service NCD 210.12 describes.
Coinsurance and the Part B deductible are waived for this service under NCD 210.12's own terms — a beneficiary detail worth confirming at check-in, since front-desk staff unfamiliar with the preventive-services carve-out sometimes collect a cost-share that shouldn't have been charged.
Eligibility: BMI ≥ 30, measured
The threshold is BMI of 30 kg/m² or higher, calculated from weight in kilograms divided by height in meters squared, and it has to come from an actual measurement taken as part of the encounter or recently on file — not a number the patient reports verbally, and not a stale BMI value carried forward in the chart from a year-old visit. Document height and weight (or the calculated BMI directly) at or near the qualifying visit.
| Category | Codes | Notes |
|---|---|---|
| BMI, adult | Z68.30–Z68.39 BMI 30.0–39.9 · Z68.41–Z68.45 BMI 40 and above | Pairs with the clinical E66 diagnosis to document the qualifying measurement — a Z68 code alone, without a charted E66 diagnosis, is a thinner claim |
| Obesity, clinical | E66.811 class 1 · E66.812 class 2 · E66.813 class 3 · E66.9 unspecified obesity | Use the class-specific E66.81x code where the record supports it; E66.9 is billable but the least specific option on the claim |
Pair the Z68 BMI code with the E66 clinical obesity diagnosis on every IBT claim. A claim carrying only the BMI code without the clinical diagnosis, or only the diagnosis without a charted BMI supporting the ≥ 30 threshold, is missing half of what a reviewer needs to confirm eligibility on its face.
The tiered visit schedule and the 3kg gate
NCD 210.12's visit schedule isn't a flat "one visit per period" benefit — it's tiered, and continuation into the final tier is contingent on a documented outcome, not automatic.
- 1Month 1: one face-to-face visit weekly.
- 2Months 2–6: one face-to-face visit every other week.
- 3Six-month checkpoint: reassess obesity status and document the amount of weight lost since the start of intensive therapy. This determination has to be documented in the office record consistent with usual practice — it isn't optional paperwork, it's the gate to the next tier.
- 4Months 7–12: one face-to-face visit monthly — but only for beneficiaries who achieved at least 3kg of weight loss over the first six months of intensive therapy.
A beneficiary who hasn't hit the 3kg mark at the six-month visit isn't discharged from the benefit. NCD 210.12 calls for a reassessment of the beneficiary's readiness to change and their BMI after an additional six-month period, rather than automatic continuation into the monthly phase. That's a materially different outcome from a hard coverage cutoff, and it's worth stating plainly to both the clinical team and the patient so a missed 3kg target doesn't get treated as the end of covered counseling when it isn't.
Combined, the schedule caps out at up to 22 face-to-face G0447/G0473 visits in a rolling 12-month period (4 weekly + 11 biweekly + up to a further stretch depending on exact calendar alignment, capped by the NCD's own visit-count ceiling). Track visit count against the rolling 12-month window at the scheduling level, not just at billing — a program that loses count of where a patient sits in the tier structure risks either under-delivering covered visits the patient is entitled to, or scheduling visits the benefit no longer covers for that period.
The incident-to trap: who can actually furnish this service
This is the sharpest trap in the specialty, and it runs in the opposite direction from what most nutrition billing teams expect after working MNT claims. NCD 210.12, quoted directly: coverage applies to counseling "furnished by a qualified primary care physician or other primary care practitioner," in a primary care setting, defined by reference to Social Security Act §1833(u)(6) and §1833(x)(2)(A)(i)(I)–(II).
- Physicians with a primary specialty of family medicine, internal medicine, geriatric medicine, or pediatric medicine.
- Nurse practitioners, clinical nurse specialists, and physician assistants, as defined at Social Security Act §1861(aa)(5).
- Any of the above billing directly under their own NPI, when they personally furnish the counseling.
- A registered dietitian is not one of the practitioner types NCD 210.12 names as qualified to furnish the counseling directly.
- Industry billing guidance treats RD-delivered IBT as billable only incident-to a qualifying physician or NPP — direct-to-NPI billing by the RD is the error to catch before the claim goes out.
When an RD furnishes the counseling, the claim goes out incident-to the supervising physician or NPP: billed under that supervising provider's NPI, delivered in a non-facility primary care setting, meeting the standard incident-to conditions — direct supervision, an established plan of care, the supervising provider actively involved in that patient's care — on top of the location and provider-type requirements NCD 210.12 itself imposes.
Compare that to MNT, covered in depth in our complete nutrition and dietetics billing guide: MNT is a dietitian-specific benefit an RDN bills directly under their own NPI, and by regulation it can never be billed incident-to a physician. Obesity IBT runs the opposite direction by design, because it sits under different statutory authority — a preventive service under NCD 210.12, not a Part 410 Subpart G dietitian-specific benefit the way MNT and DSMT are. Same dietitian, same clinic, opposite billing status depending on which code family is on the claim — and a biller who applies MNT's direct-billing habit to an IBT claim by reflex bills it under the wrong NPI entirely, which is a compliance problem the payer can trace back past the claim to the credentialing file, not just a reimbursement one.
Do and don't
- Document measured height and weight (or a current BMI) at or near the qualifying visit, every time.
- Chart the 3kg reassessment explicitly at the six-month visit, whichever way it comes out.
- Bill RD-delivered IBT incident-to the supervising physician or NPP's NPI, with supervision documented.
- Track visit count against the rolling 12-month, up-to-22-visit ceiling at the scheduling level.
- Don't bill G0447/G0473 under an RD's own NPI — they aren't a named qualified furnishing provider under NCD 210.12.
- Don't treat a missed 3kg target as a benefit termination; it triggers a reassessment, not a cutoff.
- Don't accept self-reported height/weight or a stale chart BMI as documentation of the ≥ 30 threshold.
- Don't apply MNT's direct-billing habit to an IBT claim by reflex — the provider-status rule is reversed.
Running obesity IBT and MNT out of the same clinic?
We'll audit a sample of your G0447/G0473 claims for incident-to and provider-status errors, and show what's recoverable versus what needs a billing-workflow fix going forward.
Frequently asked questions
Can a registered dietitian bill G0447 under their own NPI?
Generally no. NCD 210.12 defines the qualified furnishing provider as a primary care physician or a primary care practitioner as defined at Social Security Act §1833(x)(2)(A) — physicians in family medicine, internal medicine, geriatric medicine, or pediatric medicine, or nurse practitioners, clinical nurse specialists, and physician assistants. A registered dietitian is not one of the practitioner types the NCD names, so when an RD furnishes the counseling, industry billing guidance treats it as billable only incident-to a qualifying physician or NPP, in a non-facility primary care setting, under that supervising provider's NPI — not the RD's own.
What happens if a beneficiary doesn't lose 3kg by the six-month visit?
They aren't cut off from the benefit. NCD 210.12 calls for a reassessment of the beneficiary's readiness to change and their BMI after an additional six-month period, rather than automatic continuation into the monthly (months 7-12) visit schedule. The 3kg threshold, documented at the six-month visit, is specifically what gates continuation into the every-4-week phase — it isn't a coverage cutoff for the benefit as a whole.
How many G0447/G0473 visits does Medicare cover in a year?
Up to 22 combined visits in a rolling 12-month period, following NCD 210.12's tiered schedule: one visit weekly for month 1, one every other week for months 2 through 6, then — contingent on the beneficiary having lost at least 3kg over that first six months — one visit monthly for months 7 through 12. Visits beyond that structure, or visits billed without BMI ≥ 30 kg/m² documented from measured (not self-reported) height and weight, fall outside the covered benefit.
Verify before billing. CPT is a registered trademark of the American Medical Association; codes here are paraphrased, not reproduced from the CPT Professional edition. CPT, HCPCS and ICD-10 codes, coverage policy, and bundling edits change, including annual code-set updates. This page reflects standard industry practice and is provided for general education — it is not a substitute for your own compliance review, your current payer contracts, or the current-year code sets. Confirm requirements against your specific payer mix before submitting claims.