The TM Flow System

Boost Revenue with the TM Flow System

A non-invasive, in-office diagnostic tool that performs three reimbursable tests in one quick session. The TM Flow System helps providers generate additional income while improving patient care through early detection of autonomic and vascular conditions.

TM Flow System – Frequently Asked Questions

What is the TM Flow System?

The TM Flow System is an FDA-cleared, non-invasive diagnostic device that combines multiple assessments into a single in-office session, including Ankle-Brachial Index testing for peripheral arterial disease, sudomotor testing for small fiber nerve function, and autonomic testing through heart rate variability analysis. It is designed for use in office-based settings that want objective vascular and autonomic data to support clinical decision-making.

What conditions can the TM Flow System help evaluate?

The TM Flow System is used to support the evaluation and monitoring of peripheral arterial disease, small fiber neuropathy, diabetic peripheral neuropathy, autonomic dysfunction, and related cardiometabolic complications. It is especially relevant in patients with diabetes, pre-diabetes, hypertension, metabolic syndrome, and unexplained lower-extremity symptoms.

How long does a TM Flow test take?

A TM Flow testing session typically takes about 10 to 12 minutes from setup to results. The test is designed to fit efficiently into an office workflow and can be performed by trained clinical staff.

Is the TM Flow System FDA-cleared?

Yes. The TM Flow System is FDA-cleared for clinical use in the United States.

Is TM Flow testing covered by Medicare?

All testing performed with the TM Flow System is covered by Medicare. Coverage and reimbursement should still be confirmed by your billing team based on documentation, payer policies, and local requirements.

What CPT codes are commonly associated with TM Flow testing?

Commonly referenced CPT codes may include 95921, 95923, and 93922, depending on the components performed and documented. Your billing and compliance team should confirm current code usage and payer-specific requirements.

Does TM Flow testing require a dedicated room or specialized setup?

No. TM Flow testing can be performed in any physician’s office room and does not require a specialized testing environment.

Can clinical staff perform TM Flow testing?

Yes. Trained clinical staff can administer TM Flow testing under the appropriate physician order and workflow protocol.

How does the TM Flow System compare to traditional autonomic testing?

The TM Flow System performs three of the standard autonomic function tests in a single in-office session. This allows clinicians to gather objective autonomic and vascular data without sending patients to a more specialized testing setting.

Who is a good candidate for TM Flow testing?

Appropriate candidates may include patients with diabetes, pre-diabetes, metabolic syndrome, hypertension, unexplained neuropathy symptoms, lower-extremity discomfort, or symptoms that suggest autonomic dysfunction or impaired circulation.

ANS / ABI / Sudomotor Testing

  • User-friendly, non-invasive medical test
  • 7-10 minute test
  • Report is easy to interpret
  • Perform and bill for 3 CPT codes
  • Average Medicare Reimbursement $200-300

Take your office’s diagnostic capabilities to the next level with the TM FLOW SYSTEM. Get fast, reliable answers in-office without invasive tests. Call or complete our online form for more details.

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TM Flow System

Setting New Standards in Diagnostic Excellence

Evaluate Small Fiber Neuropathy with TM Flow System

  • User-friendly medical test
  • Non-invasive
  • 7-10 minute test
  • Easy to interpret report
  • Allows provider to perform and bill for 3 CPT codes
TM-Flow System CPT Codes
  • 95921 Autonomic Function Testing
  • 95923 Sudomotor Testing
  • 93922 Ankle-Brachial Index Test
TM Flow System
TM Flow System

Autonomic, Vascular and Cardiometabolic Risk Assessments

  • Differentiating the patient symptom causes.
  • Early detection of chronic metabolic diseases, such as type 2 diabetes and vascular disease.
  • Early detection of ANS and vascular complications.
  • Treatment management of type 2 diabetes using scores, Cardiovascular and hypoglycemia risk markers.

The TM Flow System is a Patented system.

“Over the last 10 years I have purchased two TM FLOW Systems and the VAT from Primary Care Diagnostics. I would recommend them to any of my colleagues. The company is prompt, responsive and very easy to assist with anything our office needs.

“Dr. Aluko, Charlotte, NC

TM Flow System
About the TM Flow System

TM Flow System focuses on early detection and follow-up of complications (autonomic nervous system & vascular system) of chronic metabolic diseases such as diabetes.

The TM FLOW System includes the following tests to determine these clinical outcomes and includes:
  • Sudomotor function tests – using sympathetic skin response
  • Photo-plethysmography analysis – using an oximeter. This includes heart rate variability analysis and spectral analysis of the oximeter waveform.
  • Cardiac Autonomic Reflex Tests or EWING Tests: which include valsalva maneuver, deep breathing exercises, postural changes
  • Ankle Brachial Index (ABI ) measurement using PPG
TM Flow System
TM Flow System
No Human Error
Simultaneous Measurements
Accurate Results
Clear Report
ANS & Vascular Function Overview

TM Flow System Medical System Markers

Vascular Function Assessment

Arterial stiffness, CASP and Ankle Brachial Indices from the volume plethysmography analysis.

Homeostatic Markers

Patented markers of insulin resistance, inflammation, endothelial regulation from the Photoplethysmography (PTG) Spectral analysis.

ANS Assessment

Sudomotor Function Markers.
Heart rate variability analysis (HRV)
Cardiac Autonomic Reflex Tests
Valsalva Ratio, E/I Ratio,
K30/15 Ratio and
Systolic Pressure Response to Standing

TM Flow System Patient Setup

TM Flow Device Patient Setup

Device Components

TM Flow Components, TM Flow Software

TM Flow System Features

TM Flow System Features

Tax Advantages

Primary Care Diagnostics offers flexible financing options to meet your needs.


TM Flow System Videos