Greg Katz, MD
Substacknewsletter · by Greg Katz, MD · English
- Audience
- 8K subscribers
- Shown publicly on Substack
- Observed frequency
- Weekly
- From 7 posts indexed in the last 90 days
- Last post
- Oct 30, 2026
- 13 days ago
- Likely audience
- physicians
- Inferred from post content
Greg Katz, MD is a Substack newsletter by Greg Katz, MD covering multi-cancer early detection testing, Medicare coverage policy and HSA and FSA eligible health products. NewsletterFIT indexed 7 posts from it in the last 90 days, most recently on Oct 30, 2026. Shown publicly on Substack: 8K subscribers.
Topics
- multi-cancer early detection testing
- Medicare coverage policy
- HSA and FSA eligible health products
- GLP-1 medications
- medical evidence and healthcare spending
Recent posts
- “I have…
- We are…
- How Do…
- Is Retatrutide…
- Your Oura…
- What some…
Sponsors detected
No sponsored posts detected in the last 180 days of indexed posts.
Detected automatically from posts marked as sponsored. Detection can miss or misread placements.
See the full picture on Greg Katz, MD
Subscriber momentum over time, every detected sponsor with the source post, companies and people it mentions, guests, and an alert when any of it changes.
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Compiled from public pages · refreshed Nov 3, 2026 · How NewsletterFIT collects and labels data