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12 min readJanuary 2026

MMI Letter Template: Documenting Maximum Medical Improvement

Introduction: Reaching the Plateau

Maximum Medical Improvement (MMI) is a pivotal concept in injury cases. It signifies that a patient has recovered as much as they are going to. The MMI Letter communicates this status to insurers and lawyers, effectively transitioning a case from active treatment to settlement or maintenance.

Why an MMI Letter is Essential

This document drives the legal and financial resolution of a claim:

  • Claim Resolution: Signals that temporary total disability (TTD) payments may end and permanent partial disability (PPD) assessment begins.
  • Impairment Rating: Provides the percentage of impairment (if any) used to calculate settlement values.
  • Future Care: Outlines what ongoing medical needs (e.g., meds, annual checks) the insurer is liable for.
  • Legal Compliance: Meets strict statutory requirements for reporting in workers' compensation systems.

Key Components of an MMI Report

A complete MMI report must include:

  • MMI Date: The effective date the patient reached stability.
  • Diagnosis/Treatment Summary: Brief recap of the injury and care provided (e.g., surgery, PT).
  • Current Status: Objective findings (ROM, strength) keeping the patient from full recovery.
  • Permanent Impairment Rating (PIR): Calculated per the AMA Guides (e.g., "5% Whole Person Impairment").
  • Permanent Restrictions: Long-term limitations (e.g., "No lifting > 50lbs").

Complete MMI Letter Template

MAXIMUM MEDICAL IMPROVEMENT (MMI) REPORT

Date: [Date]
To: [Insurance Adjuster/Attorney]
Re: [Patient Name] | DOB: [Date] | Claim #: [Number]

1. MMI Determination:
The above-named patient has reached Maximum Medical Improvement (MMI) as of [Date]. Their condition is stable and unlikely to change substantially in the next year with or without further medical treatment.

2. History & Treatment:
Pt sustained a [Injury Type, e.g., Lumbar Strain] on [Date of Injury]. Treatment included [Summary: NSAIDs, 6 weeks PT, epidural injection].

3. Current Subjective Complaints:
Occasional low back stiffness, rated 2/10 pain.

4. Permanent Impairment Rating (PIR):
Based on the AMA Guides to the Evaluation of Permanent Impairment (6th Ed):
*   Diagnosis: Lumbar Sprain/Strain
*   Class/Grade: Class 1, Grade C
*   Whole Person Impairment (WPI): 2%

5. Permanent Work Restrictions:
[ ] No Restrictions / Full Duty.
[ X ] Permanent Restrictions:
    *   No lifting over 40 lbs repetitive.
    *   Allow position changes every hour.

6. Future Medical Care:
Patient will require [e.g., intermittent OTC anti-inflammatories, home exercise program]. No further surgical intervention is indicated.

Sincerely,

[Physician Signature]
[Physician Name, MD/DO]

Automating MMI Documentation with HealOS

MMI reports require synthesizing months of data. HealOS AI agents make it effortless:

Automated Workflow Diagram (Mermaid)

graph TD
    A[Physician Determines MMI] --> B[HealOS Clinical Doc Agent Summarizes Treatment];
    B --> C[HealOS EHR Agent Pulls Imaging/Surgical Reports];
    C --> D[Provider Calculates Impairment];
    D --> E[HealOS Drafts MMI Letter];
    E --> F[Provider Reviews & Signs];
    F --> G[HealOS Submits to Insurer/Attorney];

Frequently Asked Questions (FAQs)

Q: What is Maximum Medical Improvement (MMI)?

It is the point where an injured person's condition has stabilized, and no further significant improvement is expected, even with additional treatment.

Q: Does MMI mean I am 100% cured?

No. It simply means your condition has plateaued. You may still have pain, limitations, or disability.

Q: Who determines when MMI is reached?

The treating physician makes this clinical determination based on your response to treatment and objective findings.

Q: What happens after MMI?

Your case typically shifts from temporary benefits to determining permanent disability (if any) and settlement negotiations.

Q: What is an Impairment Rating?

A percentage assigned to body parts or the 'whole person' (based on AMA Guides) indicating the severity of permanent loss of function.

Q: Can I get treatment after MMI?

Yes, 'palliative' or maintenance care (like occasional PT or meds) to keep the condition from worsening is often allowed.

Q: What if I disagree with the MMI finding?

You can request a second opinion or an Independent Medical Examination (IME) to challenge the finding.

Q: Are MMI letters used in court?

Yes, they are core evidence in workers' compensation and personal injury litigation to establish damages.

Q: How do HealOS agents help with MMI?

They automate the compilation of treatment history and facilitate the drafting of the detailed MMI report, ensuring accuracy.

Q: How is impairment calculated?

Physicians use standardized guides (like the AMA Guides to the Evaluation of Permanent Impairment) to calculate the rating.


Strategic Documentation with HealOS

Produce accurate, defensible MMI reports in a fraction of the time. Let HealOS AI agents handle the data synthesis so you can focus on the medical evaluation.

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Example Letter Template

MMI Letter Template

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