Billing codes · CPT code
CPT 99401, 99402, 99403 and 99404: can dietitians bill them?
By Javier Alvarez · Updated · 4 min read
| Codes | 99401 (~15 min), 99402 (~30 min), 99403 (~45 min), 99404 (~60 min) |
|---|---|
| What they cover | Preventive counseling and risk-factor reduction for one person |
| How billed | One code per encounter, chosen by time; not billed in units |
| CPT section | Evaluation and management (preventive medicine services) |
| Medicare status (2026 PFS) | N (non-covered); Medicare MUE is 0 |
| UnitedHealthcare | Reimbursement policy says RDs should not report 99401; use MNT codes |
| Usual RD alternative | 97802 / 97803, preventive or medical benefit |
99404 shows up in dietitian forums for a simple reason: a colleague said a payer paid it, or a denial on 97802 sent someone looking for another code. Before you add 99401-99404 to a superbill, it helps to know what these codes are, who they're built for, and what the major payers actually say.
The four codes and their time
CPT describes the family as preventive medicine counseling and/or risk factor reduction intervention(s) provided to an individual, and each code carries an approximate time:
| Code | Approximate time | Typical actual time that maps to it |
|---|---|---|
| 99401 | 15 minutes | 8–22 minutes |
| 99402 | 30 minutes | 23–37 minutes |
| 99403 | 45 minutes | 38–52 minutes |
| 99404 | 60 minutes | 53 minutes or more |
Unlike 97802/97803, you don't bill units. You pick one code for the encounter, the one whose typical time is closest to the face-to-face time. The "closest typical time" rule is how many payers handle sequential time codes; North Dakota Medicaid's claims guidance states it plainly.
The group versions are 99411 and 99412.
Who typically bills them
These codes sit in CPT's evaluation and management (E/M) section, among the preventive medicine services. The clinicians who normally report them are physicians and other practitioners who can bill E/M: nurse practitioners, physician assistants, clinical nurse specialists. The counseling is meant for risk reduction in people without an established illness, like diet and exercise counseling during a preventive visit. Counseling for a condition the patient already has is usually reported with other codes.
That E/M placement is the whole story for dietitians. Many payers don't let nonphysician professionals report E/M codes, and a registered dietitian is a nonphysician professional in those policies.
Can a dietitian bill 99401-99404?
It depends on the payer. Here's what the published policies say:
- Medicare: no, for anyone. In the October 2026 Physician Fee Schedule file, 99401-99404 carry status N (non-covered), and the Medicare practitioner MUE for each is 0 (CMS PFS files, MUE table). For Medicare MNT, the codes are 97802-97804 and G0270/G0271.
- UnitedHealthcare commercial: no. UHC's nonphysician E/M reimbursement policy lists "Nutritionist (Registered Dietician)" as a nonphysician professional that won't be reimbursed for E/M codes billed under its own TIN. Its Q&A answers this exact question: a registered dietitian performing MNT should not report 99401 and should use codes such as 97802.
- Other commercial and Medicaid plans: varies. Some contracts do list preventive counseling codes for dietitians. If yours does, get the code list in writing, attached to the contract or fee schedule. A rep saying "should be fine" isn't enough.
99401 vs 97802: which one the payer wants
Preventive policies often list both families side by side. UnitedHealthcare's Preventive Care Services policy (effective July 1, 2026) puts "Medical Nutrition Therapy or Counseling: 97802, 97803, 97804, G0270, G0271" and "Preventive Medicine Individual Counseling: 99401-99404" in the same rows. The prediabetes row, for example, requires R73.03 and is limited to ages 35 to 70. Cigna's Preventive Care Services policy A004 lists 97802-97804 and S9470 in its nutrition and physical activity counseling rows, and 99401-99404 separately.
The practical rule for a dietitian:
- Default to 97802/97803. They describe what you do, they're the codes payers credential RDs for, and they appear in the same preventive rows.
- Use 99401-99404 only if your contract lists them for your specialty.
- Don't swap codes to rescue a denial. If 97802 was denied for a preventive visit, the fix is usually the diagnosis routing, not the procedure code. See preventive vs medical benefits.
Pairing with Z71.3 and risk codes
Whichever code family you bill, the diagnosis decides which benefit pays:
- Preventive routing usually wants a wellness or risk code first. Cigna's A004 asks for a "designated wellness code" in several nutrition rows, and Z71.3 is a common one. UnitedHealthcare's rows key on specific codes, such as R73.03 for prediabetes or obesity and BMI codes for weight rows.
- Medical routing puts the condition first, such as E66.x obesity or R73.03. Cigna says preventive services billed with diagnosis codes for illness or injury are reviewed under the medical benefit.
The ACA's no-cost-sharing preventive benefits (see HealthCare.gov) include diet counseling for adults at higher risk of chronic disease. How a plan implements that is in its own policy, which is why the rows above matter.
Common problems with 99401-99404 on RD claims
| Problem | Likely result | Fix |
|---|---|---|
| RD bills 99401 to a payer that bars nonphysician E/M | Denied as not payable to this provider type | Rebill as 97802/97803 if the service was MNT |
| 99401-99404 billed to Medicare | Non-covered | Use Medicare MNT codes with a qualifying diagnosis and referral |
| Several 99401 units for one session | Denied or reduced | One code per encounter, chosen by time |
| Illness diagnosis first on a "preventive" visit | Routed to the medical benefit, with cost share | Sequence per the payer's preventive policy |
For reading the remit when one of these comes back, see Z71.3 denials and nutrition claim denials.
How to confirm with the payer
Ask two separate questions and record both answers:
- Reimbursement: "Is a registered dietitian allowed to bill CPT 99401-99404 under my contract, or only 97802-97804?"
- Benefit: "For this member, is nutrition counseling covered under preventive or medical, and which diagnosis codes does the preventive benefit require?"
Our insurance verification call script turns these into a checklist you can use on every new patient.