Insurance Billing

Medicare MNT Billing Guide for Dietitians (2026 Rules)

Medicare MNT for RDs: diabetes and renal disease only, 3 hours then 2, physician referral with NPI, 97802/97803 vs G0270/G0271, telehealth and claim rules.

By Javier Alvarez · Published July 12, 2026 · Updated September 29, 2026 · 8 min read

Last verified: September 29, 2026 — against NCD 180.1, 42 CFR 410.130–410.134, the Medicare Claims Processing Manual (Ch. 4, §300) and CMS's 2026 telehealth guidance.

Medicare is the payer dietitians most often get wrong — not because it's arbitrary, but because it's specific. Commercial habits don't transfer: the covered conditions are enumerated, the hours are capped by regulation, the referral isn't optional, and two G-codes exist that no commercial payer asks for. Bill Medicare on autopilot and the denials are automatic too.

The upside of all that specificity: once you know the rules, Medicare is one of the most predictable payers you'll ever bill. There's no mystery fee schedule and no coverage roulette. This is the hub for everything Medicare on our site — each section links to the deeper page when you need it. (If you're answering a patient's "does Medicare cover a dietitian?" question, the short version is on Medicare nutrition counseling coverage.)

Where the rules come from

Three documents govern Medicare MNT, and it helps to know which is which:

• The regulation: 42 CFR 410.130–410.134 (Part 410, Subpart G) — 410.130 defines diabetes, renal disease and the episode of care; 410.132 sets the conditions (physician referral, hour limits, the dialysis exclusion); 410.134 says who qualifies to provide it.
• The national coverage determination: NCD 180.1 — 3 hours the first year, 2 hours after, more only when the physician documents a change, and no MNT and DSMT on the same date of service.
• The billing instructions: the Medicare Claims Processing Manual, Ch. 4 §300 — codes, referring NPI, assignment, payment.

First prerequisite: you must be enrolled

You cannot bill Medicare until you're enrolled as a Medicare provider, and an RD who furnishes covered MNT to a beneficiary must file the claim. The only way out of that is formally opting out of Medicare — a binding choice that means private contracts with every Medicare patient and no Medicare payment at all — which is a different business model, not a workaround. Enrollment (PECOS, MAC processing, effective dates) is its own process with its own timeline; work through the Medicare enrollment guide for dietitians first. Everything below assumes you're enrolled with an active PTAN. (Seeing Medicare patients in more than one state? CMS requires a separate enrollment for each state — see payer contracts across state lines.)

What Medicare covers: diabetes and renal disease, not "nutrition"

Medicare Part B covers MNT only for beneficiaries with diabetes or renal disease, as 42 CFR 410.130 defines them:

Two exclusions to know:

• Maintenance dialysis. MNT is not covered for beneficiaries receiving maintenance dialysis; their nutrition care comes through the dialysis facility.
• Everything else. Prediabetes, obesity without a qualifying diagnosis, hyperlipidemia, hypertension, GI conditions — none of these qualify for the Part B MNT benefit on their own. A claim without a diabetes or renal diagnosis is denied.

What Medicare does NOT cover (the part that surprises people): general weight-loss counseling by a dietitian, billed as MNT, without a qualifying diagnosis. (Medicare does have a separate obesity behavioral counseling benefit, G0447, but it's billed by primary-care practitioners in primary-care settings rather than by RDs billing independently — verify current CMS policy carefully before building a Medicare caseload around it.) When a service isn't covered, discuss cost with the patient up front and use an Advance Beneficiary Notice (ABN) so they can knowingly choose to pay out of pocket.

Coding the qualifying condition well matters: see E11 type 2 diabetes codes and N18 CKD codes.

The hours: 3 in year one, 2 after

Coverage is measured in hours per calendar year, not visits:

• First calendar year of MNT: 3 hours.
• Each subsequent calendar year: 2 hours.

Notes that keep this from biting you:

• It's a calendar year, not a rolling 12 months. The Claims Processing Manual is explicit: unused initial hours can't be carried over into the next year. A patient who starts in November doesn't carry unused hours into January — the counter resets.
• Hours convert to units: 3 hours = 12 units of 15-minute codes. A typical first year might be a 4-unit initial (97802) plus four 2-unit follow-ups (97803). Count units with the 8-minute rule exactly as documented.
• Track the balance. If another dietitian already used hours this year, those hours are gone — you can't see the counter, so ask patients about prior MNT at intake. A claim past the limit typically comes back as a CO-119 or PR-119 (benefit maximum reached).

The referral: always required, renewed annually

Medicare MNT must be referred by a physician — an MD or DO, the Social Security Act's definition of "physician" for this benefit. Nurse practitioners and physician assistants don't qualify as referring practitioners for MNT. Two rules trip practices constantly:

1. No referral, no coverage. Ever. There is no self-referred Medicare MNT. The referring physician's name and NPI go in boxes 17/17b of every CMS-1500 claim; the manual tells MACs to return claims that lack the referring physician's NPI.
2. A new referral every calendar year. A patient in their third year of MNT needs a current-year referral on file, not the original one. Build the renewal request into your December/January workflow — and into your physician referral relationships generally.

Our MNT referral form template has every field Medicare needs (diagnosis, NPI, date, signature) so the physician's office fills it in once, correctly. Keep the signed referral in the chart. In an audit, it's the first document requested.

G0270 and G0271: additional hours after a change

When the patient's condition, diagnosis, or treatment regimen changes — new insulin regimen, progression of CKD, new complicating diagnosis — the physician can make a second referral in the same year for additional hours beyond the annual limit. Those extra hours are billed with G-codes, not CPT codes:

Requirements: a new physician referral for the additional hours and documentation of the change that justifies them. Bill G-codes for regular initial hours, or CPT codes for the additional ones, and you'll be denied for using the wrong family. The code-level detail is on G0270 & G0271.

Which code, when

MNT and DSMT: both, but not the same day

A beneficiary with diabetes can receive both MNT and diabetes self-management training (DSMT) in the same year — the full hours of each. What NCD 180.1 and the manual forbid is billing MNT and DSMT on the same date of service for the same patient. If you or your organization also furnishes DSMT (G0108/G0109), schedule them on different days.

Incident-to doesn't apply

Medicare MNT is its own Part B benefit, and 42 CFR 410.26 excludes services the law lists as a separate benefit from incident-to billing. The Claims Processing Manual says it directly: MNT "cannot be paid 'incident to' physician services." The RD bills under her own NPI — even inside a physician's practice, where the rendering RD's NPI goes on the claim. The full explanation, including what can be billed incident-to, is in can dietitians bill incident-to?

Telehealth in 2026 (as of September 2026)

Medicare telehealth rules for MNT are settled through the end of 2027:

• 97802, 97803, 97804 and G0270 are on CMS's CY 2026 Medicare Telehealth Services List. G0271 is not.
• Registered dietitians are eligible distant-site practitioners.
• Per CMS's Telehealth FAQ, through December 31, 2027 beneficiaries can receive Medicare telehealth anywhere in the US, including at home. From January 1, 2028, outside behavioral health, they will generally need to be in a medical facility in a rural area.
• Bill POS 10 for a patient at home and POS 02 elsewhere. Whether your MAC wants modifier 95 on professional MNT claims isn't stated in CMS's professional billing instructions — check your MAC's telehealth page.

The details, including audio-only and hospital-based RDs, are in Medicare telehealth for MNT in 2026; general telehealth mechanics across payers are in the telehealth billing guide.

Billing specifics that differ from commercial payers

• Assignment is mandatory for MNT. RDs must accept assignment — you accept Medicare's allowed amount as payment in full, with no balance billing. The manual sets payment at the lesser of your actual charge or 85% of the Physician Fee Schedule amount; look up your locality's amounts in the CMS Physician Fee Schedule tool (context in what drives dietitian reimbursement rates).
• Claim filing is mandatory, whether or not you'd rather hand the patient a superbill. If you furnish a covered service to a beneficiary, you file the claim — the superbill model is not an option for covered Medicare MNT.
• Diagnosis coding follows the referral. The qualifying condition (E10.x/ E11.x diabetes, N18.x CKD, or transplant status) drives the claim — this is not a Z71.3-primary situation.
• Patient cost sharing: Medicare.gov's MNT coverage page lists MNT as a preventive service and says the beneficiary pays nothing if they qualify. Confirm on your first remittances before you set your front-desk collection rules.
• Group practices: the rendering RD's NPI goes on the claim, and dietitians enroll under Medicare specialty code 71.
• Medicare Advantage is a different animal. MA plans must cover what Original Medicare covers, but networks, prior auth, and claim routing differ by plan — see billing Medicare Advantage as a dietitian.

A Medicare MNT checklist

1. Enrolled, with active PTAN and current fee schedule amounts.
2. Qualifying diagnosis confirmed (diabetes, non-dialysis CKD, or transplant within 36 months) — and the patient isn't on maintenance dialysis.
3. Current calendar-year physician referral on file, NPI captured.
4. Hours remaining this year verified against your records and patient history.
5. Units counted from documented face-to-face time.
6. Right code family: 97802/97803/97804 for the basic hours, G0270/G0271 for hours after a second referral.
7. No DSMT billed for the same patient on the same date.
8. Telehealth: POS 10/02 per CMS, modifier per your MAC; G0271 not billed as telehealth.
9. Claim filed under your own NPI, with assignment accepted.

Rigid rules cut both ways: they're unforgiving to guesswork and generous to systems. Put these nine checks into a repeatable workflow and Medicare becomes your most boring payer — which is exactly what you want.

How Farela helps: Farela tracks the rules you'd otherwise track by hand — referral on file and renewal dates, hours used against the annual cap, units from actual session time — and validates each Medicare claim before submission. Create your free account. The EHR is free; billing is 3.9% of what an insurer pays, plus your own Claim.MD plan.

Part of Medicare MNT.