For Dietitians ·
What you'll accomplish
Prior authorization letters that used to take 20-30 minutes now take 5, with stronger clinical language and a higher approval rate. You'll finish with letter templates ready for your most common authorization scenarios.
What you'll need
Before opening Claude, have these details ready (use de-identified info, no patient names):
Go to claude.ai → New chat. Establish the context:
I'm a registered dietitian writing prior authorization letters for medical nutrition therapy
insurance coverage. Help me write formal, persuasive prior authorization letters.
Use clinical language appropriate for insurance reviewers.
Structure: brief patient summary, medical necessity statement, proposed treatment plan,
expected outcomes. Avoid redundancy. Length: 1-2 paragraphs maximum.
Now provide the specific case details (de-identified):
Write a prior authorization letter for medical nutrition therapy. Patient details:
- Diagnosis: [ICD-10 code] [diagnosis description, e.g. E11.9 Type 2 diabetes mellitus, uncontrolled]
- Key clinical indicators: [A1c X%, BMI X, eGFR X, other relevant labs]
- Previous interventions: [e.g. Started metformin 6 months ago, no lifestyle counseling received]
- Requested: [X] sessions of individual MNT (CPT [97802/97803])
- Insurer: [insurance company]
- Treating RD: [Your credentials — e.g. Jane Smith, MS, RD, LD]
Claude will produce a formal letter draft. Review for:
If the letter needs strengthening, ask: "Make the medical necessity argument more specific. Cite that uncontrolled diabetes with A1c >8% meets CMS criteria for MNT coverage."
Some insurers have specific language requirements. For Medicare MNT:
Ask Claude: "Add a sentence confirming this service will be provided by a Registered Dietitian as required by Medicare coverage criteria."
Once you have a good letter for a specific condition (T2DM, CKD, eating disorder), save it as a template with blank brackets where patient-specific values go:
Diagnosis: [ICD-10] | Labs: [values] | Sessions: [number]
Fill in the brackets for each new patient. Takes 2 minutes.
Type 2 Diabetes MNT auth:
Prior auth for T2DM MNT. ICD-10: E11.9. A1c: [X]%. BMI: [X].
Previous interventions: [e.g. on metformin, no prior MNT].
Requesting [X] sessions CPT 97802/97803.
Emphasize: ADA Standards of Care recommend MNT by an RD for all patients with diabetes.
Eating disorder MNT auth:
Prior auth for MNT for eating disorder. ICD-10: [F50.0 anorexia/F50.2 bulimia/other].
Clinical indicators: [BMI, labs, any medical complications].
Requesting [X] sessions. Emphasize: MNT is a core component of eating disorder treatment
per NICE guidelines and APA Practice Guidelines; inadequate nutrition affects psychiatric treatment response.
Obesity MNT auth (with co-morbidities):
Prior auth for MNT for obesity with co-morbidities.
ICD-10: E66.9 plus [co-morbidity codes — HTN, T2DM, NAFLD, etc.].
BMI: [X]. Clinical indicators supporting treatment: [labs, blood pressure, metabolic markers].
Requesting [X] sessions. Note that obesity is recognized as a chronic disease requiring
ongoing MNT support per clinical guidelines.