LabReflex

Christopher Zahner, MD

4.9 (8)
Medicine

A conversational podcast about more innovative diagnostics, lab insights, and the future of clinical testing. Hosted by Dr. Christopher Zahner, LabReflex brings expert voices, industry trends, and practical conversations straight from the laboratory bench to your brain.

2h ago

Deep Dive: DMT What Works (and What Doesn't) Ep03

1. The Origin Story — Why Coagulation? Coagulation became the natural birthplace of DMTs because hematology was merging with oncology in the 1980s, leaving bleeding disorders to pathology.This created a perfect storm: clinicians didn’t understand coagulation tests, but needed them urgently.The gap between complex lab data and clinical interpretation created the need for expert interpretation teams.2. The Core Problem DMTs Solve Diagnostic uncertainty is the primary driver for DMTs.Clinicians often guess at routine test results—immature platelet fraction, Apo E4 subtypes—because they lack expertise.DMTs provide the “place to go” when clinicians say, “I don’t know,” but need answers for patient care.3. What Works — Successful DMT Models COVID DMT: Built 75 → 150 interpretive reports integrating PCR, antibody, and rapid test data. It actually reduced mortality and length of stay, but was shut down after four years due to political pressure.Rare Disease Economics: PKU—6 genes, 1,200+ mutations—with new small-molecule therapy. Lab expertise saves lives from birth.Chain of Reasoning: A teaching tool that makes every patient case a learning moment. Vanderbilt’s CMO reported that this transforms resident education.Resource Management DMT: Platelet refractoriness team at Emory—logistics and resource optimization as clinical diagnosis.4. What Doesn’t Work — Failed DMT Models DMTs started by people who don’t know the specialty deeply.Ideas like a “fatty liver DMT” that require expensive equipment most institutions can’t afford.Projects forced by administrators without clinical expertise or commitment.5. The Three Questions for Starting a DMT Commitment: Can you do it Monday through Friday?Weekend cases will pile up.Knowledge: Do you know enough about this area to lead it?Succession: Who does it when you’re gone?Build redundancy before starting.6. The Real Value Proposition DMTs aren’t just cost-cutting tools—they’re clinical value creators.They improve diagnosis speed and accuracy.They teach clinicians at the point of care.They create institutional knowledge that persists beyond individual experts.Bottom Line Start DMTs only in areas you know deeply, commit to daily operation, build redundancy, and focus on clinical impact rather than administrative metrics. The most successful DMTs solve real diagnostic uncertainty while teaching the next generation of clinicians.
Aug 19

Deep Dive: Why 95%?

# Why 95%? The Statistical Convention Behind Reference Intervals — and Why It Misleads Patients ## SummaryChris and Dr. Aakash explain how the 95% reference interval became the standard in laboratory medicine — not from physiology, but from a statistical convention borrowed from astronomy. They show why a healthy person has a 65% chance of flagging "abnormal" on a 20-test panel, why patients interpret red flags as disease, and why the fix isn't fewer tests but more frequent, individualized baselines. ## Key takeaways- The 95% reference interval comes from measuring 20 healthy people and dropping the top and bottom 1 (2.5% each tail) — a statistical convention, not a disease threshold.- On a 20-test panel, a healthy person has roughly a 65% probability of at least one result falling outside the reference interval purely by chance.- "Normal" means four different things: analytical variability (Gaussian error), population distribution, individual baseline, and disease state — and patients hear the last one while labs report the second.- Clinicians lack intuition for many of the 10,000+ tests labs perform (e.g., protein C/S deficiencies), yet receive no criticality context with results.- The hosts argue for mapping flags to clinical guidelines rather than statistical cutoffs, and for serial testing to establish each patient's personal baseline — "the best reference range for me is me."- Current cost-minimization logic (fewer tests) increases false-alarm risk; more frequent testing would reduce unnecessary interventions driven by statistical noise.- Clinical pathology (statistics-driven) and anatomic pathology (disease-identification-driven) operate on different definitions of "normal," creating systemic confusion. ## Chapters- The 95% convention and its astronomical origins- Why healthy people flag "abnormal" on routine panels- Four meanings of "normal" — and which one patients hear- Clinician blind spots across 10,000+ tests- Patient-facing reports: red flags without context- Mapping results to guidelines, not Gaussian tails- The case for serial testing and individual baselines- CP vs. AP: two cultures of "normal" ## Mentioned- MyChart (patient portal)- CMP (comprehensive metabolic panel)- CBC (complete blood count)- Protein C, Protein S (coagulation factors) ## Quotes> "We take a hundred percent healthy people. Yeah and measure them and then we call five percent of them unhealthy." > "The best reference range for me is me not a random assortment of you know other people who are considered healthy." > "The majority of costs in a health care system first of all are not lab tests. They are the interventions based on those lab tests and the fewer tests that you do the higher the probability that you're gonna freak out when you have one that's elevated or low." (00:00) - Hook (00:36) - Intro (00:48) - Welcome and Introductions (01:41) - Direct Patient Reporting Challenges (03:24) - Patient Experience With Flagged Results (05:59) - Reference Intervals and the 95% Rule (09:21) - Four Meanings of Normal (14:36) - Statistical Convention Versus Clinical Reality (18:42) - Clinician Gaps and Patient Anxiety (21:54) - Rethinking Reference Intervals and Naming (23:10) - Personal Baselines Over Population Norms (26:47) - Clinical Pathology Versus Anatomic Pathology (27:57) - Outro
Aug 10

Pulse: CMS Fee Schedule changes coming

# CMS Proposes Revaluing 88305 RVUs After Maryland Claims Analysis ## SummaryCMS is reconsidering RVUs for pathology codes 88305 and 88307 after the Maryland Health Care Commission analyzed 2023 all-payer claims data using CMS's own 25-minute intraservice time assumption. The analysis found 1,763 provider-days where 88305 alone implied more than 8 hours of work, and 587 days exceeding 24 hours. A 2016 Urban Institute pilot study (three sites) reported a 2-minute median intraservice time for 88305. CAP has scheduled an August 12 webinar on the proposed changes. The hosts argue the methodology ignores workflow reality — easy cases signed out quickly by dermatologists and gastroenterologists, with complex cases referred to pathologists — and call for the field to aggregate its own data to defend against sparse studies driving policy. ## Key takeaways- CMS assigns 25 minutes of intraservice physician time to 88305 for RVU calculation; no time is submitted on claims.- Maryland's 2023 APCD analysis multiplied 88305 volume by 25 minutes, producing 1,763 provider-days >8 hours and 587 >24 hours.- The 2016 Urban Institute time-motion study (n=3 sites) found a 2-minute median for 88305 — used to argue 12–13x overpayment.- Dermatology and GI clinicians often sign out easy 88305 cases (small biopsies) and refer complex cases to pathologists, skewing volume-time ratios.- CAP announced the proposed revaluation and hosts a webinar August 12, 2026.- The field lacks a centralized claims/outcome database to counter sparse studies; hosts suggest building one. ## Chapters- Opening Studio Updates Personal Chat- CAP Announcement CMS Fee Schedule- Maryland Study Challenges 88305 Time- CMS RVU Methodology Time Assumptions- Maryland Letter 2016 Pilot Study- Pathology Workflow Reality Check- Provider Day Data Deep Dive- CMS Next Steps August Webinar- Field Needs Data Aggregation Strategy (00:00) - Hook (00:33) - Intro (00:45) - Opening Studio Updates Personal Chat (03:25) - CAP Announcement CMS Fee Schedule (04:13) - Maryland Study Challenges 88305 Time (08:22) - CMS RVU Methodology Time Assumptions (09:53) - Maryland Letter 2016 Pilot Study (11:52) - Pathology Workflow Reality Check (14:22) - Provider Day Data Deep Dive (19:36) - CMS Next Steps August Webinar (20:41) - Field Needs Data Aggregation Strategy (22:41) - Outro
Jul 31

Pulse: ADLM Signals, Cyclospora Surges, and CLIA Redraws the Lab

# ADLM Signals, Cyclospora Surges, and CLIA Redraws the Lab ## SummaryChris and Aakash break down three major signals from ADLM 2026: simultaneous centralization of high-throughput systems and decentralization of point-of-care testing, AI shifting from demos to implementation reality with data infrastructure as the real bottleneck, and the Cyclospora outbreak exploding to 4,200 confirmed cases across 41 states. They also unpack CMS and CDC's request for information on modernizing CLIA (last updated 1988) for AI-assisted diagnosis, remote oversight, and data-only facilities, plus the FDA-approved Elecsys sFlt-1/PlGF ratio test for pre-eclampsia risk stratification in hospitalized pregnant patients 23–34 weeks gestation. ## Key takeaways- **Centralization and decentralization are happening simultaneously** — vendors are building massive high-throughput analyzers for core labs while pushing smaller instruments closer to patients, creating a "mismatch" in product strategy.- **AI implementation has moved past the demo phase** — the real questions now: who monitors data drift, who owns the data, who tracks software versions, and how performance varies across patient populations.- **Data infrastructure is the bottleneck, not algorithms** — companies gaining traction (like Bunker Hill) function as infrastructure plays, solving how to connect to health system databases; CAP is prioritizing AI inspection frameworks.- **Cyclospora outbreak is not slowing** — 4,200 lab-confirmed domestic cases, 7,400+ probable cases under investigation, 300+ hospitalizations, 41 states; CDC warns reporting lags illness onset by ~6 weeks; linked to Taylor Farms iceberg lettuce recall (~2,000 confirmed cases).- **Testing gaps obscure true outbreak scope** — Cyclospora isn't on routine GI panels; genetic tracking is harder than Salmonella (no whole-genome sequencing); labs may need to spin up testing if this becomes seasonal.- **CLIA modernization RFI is a critical inflection point** — CMS/CDC asking whether AI-assisted interpretation constitutes a "test," whether data-only facilities count as labs, and how remote competency assessment works for 90+ clinic locations.- **FDA-approved pre-eclampsia test (Elecsys sFlt-1/PlGF ratio)** — 91% sensitivity, 77% specificity for predicting severe pre-eclampsia within 2 weeks in singleton pregnancies 23–34 weeks; intended to support (not replace) clinical judgment; education needed to prevent off-label confirmatory use. ## Chapters- Opening and Personal Catch Up- ADLM Signals Overview- Centralization and Decentralization Trends- AI Implementation Beyond Demos- Data Infrastructure as AI Bottleneck- Cyclospora Outbreak Escalation- CLIA Modernization Request for Information- FDA Approved Pre-eclampsia Test ## Mentioned- **ADLM** (Association for Diagnostics & Laboratory Medicine) — 2026 conference- **Bunker Hill** — health AI company focused on data infrastructure/connectivity- **CAP** (College of American Pathologists) — prioritizing AI inspection frameworks- **CDC** — Cyclospora outbreak tracking, reporting lag warnings- **CMS** — CLIA modernization request for information (with CDC)- **Taylor Farms** — iceberg lettuce recall linked to Cyclospora- **Elecsys sFlt-1/PlGF ratio** (Roche) — FDA-approved pre-eclampsia risk test- **CLIA** (Clinical Laboratory Improvement Amendments) — 1988 legislation under review ## Quotes> "The data infrastructure they call it a layer... is going to be as important as anything else as far as AI implementation... a lot of the health AI companies that are actually gaining real traction are almost like infrastructure companies." > "The core important questions still need to be asked as, like who monitors the data drift, who owns that data? Who tracks these software versions and like who checks the performances differences amongst different patient populations." > "It used to just be build the walls higher and thicker, right? That's pretty much what we thought of and now it's a very different world." (00:00) - Opening and Personal Catch Up (01:32) - ADLM Signals Overview (02:41) - Centralization and Decentralization Trends (04:00) - AI Implementation Beyond Demos (05:44) - Data Infrastructure as AI Bottleneck (08:07) - Cyclospora Outbreak Escalation (13:59) - CLIA Modernization Request for Information (19:29) - FDA Approved Pre-eclampsia Test
Jul 24

Deep Dive: Disruption in the Laboratory

What is Disruption in the LaboratoryDefining disruption requires looking at workflow and ROI rather than just technical novelty. SummaryMarket disruption in the lab is not automatically signaled by new technologies or game-changing results. True disruption addresses underlying economic, workflow, and staffing bottlenecks. The focus should be on whether a technology simplifies the lab's work or shifts complexity elsewhere, ultimately impacting the return on investment for the institution. Key takeaways* Disruption in the lab must address underlying economics, workflow, and utility of results, not just technical novelty.* Novelty alone does not equal disruption; it must solve a specific operational problem like staffing shortages or diagnostic delays.* The key question is whether a technology removes more complexity than it creates for laboratory personnel.* Disruption often involves shifting value capture: the lab may implement a change that benefits the clinician, making the sale harder to justify internally.* Physical AI solutions, like robotics, represent disruption by automating manual physical processes, which can be a path forward.* New testing methods must simplify bench work for fungal or microbiology teams rather than just expanding the scope of testing. MentionedABB, Roche, Physical AI, Mass Spec, Spine Stat, AI tool for coronary artery calcifications on CT scans. (00:00) - Intro (00:08) - Start (01:22) - Disruption In The Laboratory Defined (02:34) - Optimizing Ancillary Tests Versus New Tools (06:56) - Physical AI And Robotics Change (11:02) - Disruption In Fungal Testing Speed (15:25) - Testing Expands Footprint Not Workflow (23:16) - The Real Measure Of Disruption (25:54) - Outro
Jul 13

Pulse: After the Cookout Parasites, Pneumonia, and the Lab’s Summer Surge

# After the Cookout: Parasites, Pneumonia, and the Lab’s Summer Surge ## SummaryThe conversation covered outbreaks like Cyclosporiasis and Legionnaires Disease, showing how laboratory testing connects to public health investigations. It also discussed the need for better data integration within labs and the potential for diagnostic informatics to drive organic growth in the lab industry. ## Key takeaways* Outbreaks like Cyclosporiasis and Legionnaires Disease highlight the need for laboratories to act as central hubs connecting patient diagnostics with environmental and public health investigations.* Connecting local testing data with broader signals, such as social media searches, could alert labs to potential outbreaks faster.* The laboratory needs to move upstream by driving decisions based on aggregated data rather than just responding to requests from health systems.* Integration of genomic profiling and molecular assays into platforms like EHRs can improve availability and utilization of testing.* The focus for the lab industry should shift toward data informatics to facilitate organic growth, rather than solely focusing on vendor sales pitches. ## Chapters* Welcome To LabReflex* Summer Outbreak Effects* Legionnaires Disease Investigation* Connecting Data And Outbreaks* Oncology Integration Story* Lab As Central Hub ## MentionedQuest Diagnostics, Flatiron Health, ADLM 2026 (00:00) - Intro (00:08) - Welcome To LabReflex (03:54) - Summer Outbreak Effects (08:20) - Legionnaires Disease Investigation (13:10) - Connecting Data And Outbreaks (15:08) - Oncology Integration Story (24:43) - Lab As Central Hub (26:00) - Outro
Jul 9

Deep Dive: The DMT Defined (Part 2 of 6)

DMT Defined Defining what a DMT is and what it is not. Summary The discussion focuses on defining Diagnostic Management Teams (DMTs) by emphasizing that a true DMT must be expert-driven, patient-specific, and aim to establish a single diagnosis in the context of the patient's illness. It contrasts this with simpler processes like reflex testing or utilization management, highlighting the need for comprehensive interpretation rather than just providing test results. Key takeaways A DMT must recommend necessary tests and provide a patient-specific diagnosis within the clinical context.The value of a finding depends on whether it is provided at a time when clinical decisions are being made.Reflex testing is a tool, not the DMT itself; the DMT establishes the diagnosis based on that information.A true DMT requires expert-driven input and aims for a single diagnosis, unlike utilization management which focuses on groupthink.The process needs to be patient-specific, requiring time, which is why it is often avoided in favor of case conferences for less complex issues.Chapters 0:00 Defining What A DMT Is 1:10 The Evolution Of DMTs 3:29 Critical Ingredients Of A DMT 12:45 DMT Versus Utilization Management 14:04 Reflex Testing Is Not A DMT 37:10 Checklist For Real DMTs Mentioned Dr. Michael Appasada, Penn, Mass General, Spalding Rehabilitation Hospital, Amazon One, Amazon Health, Open Evidence AI, Plavix. Quotes > You have to say what tests are necessary and you have to provide a diagnosis for that patient, patient specific in the clinical context of that patient. > It is a consult that is expert driven and patient specific in the context of the patient's illness. And its goal is to conclusively establish a single diagnosis. > Reflex testing is not the DMT because reflex testing says to figure out the diagnosis, you would want to do this test first based upon that you do this test or that test. (00:00) - Intro (00:08) - Defining What A DMT Is (01:19) - The Evolution Of DMTs (03:38) - Critical Ingredients Of A DMT (12:53) - DMT Versus Utilization Management (14:13) - Reflex Testing Is Not A DMT (37:18) - Checklist For Real DMTs
Jun 30

Pulse: What’s Happening Now and What We’re Watching Before ADLM

(00:00) - Intro (00:08) - Start (00:08) - Welcome To LabReflex (02:31) - Measles Outbreak And Preparedness (10:07) - Enterprise Ready Clinical AI (22:39) - Point Of Care Testing Ecosystem (25:21) - Who Owns The AI Data (29:08) - Lab Business And Future Growth (31:33) - Outro

4.9

out of 5

8 Ratings

A conversational podcast about more innovative diagnostics, lab insights, and the future of clinical testing. Hosted by Dr. Christopher Zahner, LabReflex brings expert voices, industry trends, and practical conversations straight from the laboratory bench to your brain.

Creator

Christopher Zahner, MD
Years Active

2025 - 2026
Episodes

42
Rating

Clean
Copyright

© 2025 Christopher Zahner / LabReflex

Entrepreneurship

Entrepreneurship

Updated Biweekly