The main alternatives to 3M and Optum CAC are autonomous coding platforms including MediCodio AI, CodaMetrix, Fathom, Nym and Arintra, plus outsourced coding from providers such as AGS Health. The right alternative depends on whether you are replacing the CAC tool or the coding workflow. MediCodio AI covers the both.
What are 3M and Optum CAC?
3M's coding products are now Solventum. The system many buyers still call 3M 360 Encompass CAC is published by Solventum , whose page states it "was previously 3M™ 360 Encompass™ Computer-Assisted Coding (CAC)." If a vendor list still calls it 3M, that list has not been updated. Solventum describes it as a facility coding module covering inpatient and outpatient, using "expert-guided artificial intelligence" and "a powerful blend of statistical methodologies and expert rules." It deploys on-premises or in the cloud and integrates with Solventum's CDI, auditing and professional services. No code sets are named on the page.
Optum Professional CAC is the professional and ambulatory counterpart. Optum describes it as "an advanced coding solution that harnesses the power of our patented Clinical Language Intelligence™ (CLI) technology to automate medical coding and charge capture processes," positioned to improve "ambulatory coding with a single, standardized platform across all locations and regions." A Coding Review Module is offered alongside it, and Optum lists Enterprise CAC, CDI 3D and LYNX Outpatient Charge Capture as complementary products. The page names no code sets, no EHR integrations and no certifications.
What should you look for in a CAC alternative?
The automation model. Does the product propose codes for review, code eligible charts outright, or decide per chart? That answer determines whether your coder count changes.
Named code sets and chart types. ICD-10-CM, CPT, HCPCS Level II and modifiers cover outpatient and professional fee work; ICD-10-PCS and DRG assignment cover inpatient. Most vendors here name neither, so ask directly.
Human review and exception handling. Ask what happens to a chart the system will not finish: where it goes, who reviews it, and whether the documentation gap is identified.
Compliance validation and timing. NCCI procedure-to-procedure edits , MUE limits and LCD/NCD coverage policy are the standard set. Edits that fire during coding prevent rework; edits that fire after submission produce denials. CMS updates NCCI quarterly, so ask how fast a release reaches production.
Auditability. Ask to see a code traced to the documentation passage behind it and the rule applied, on a chart you supply.
Integration and migration. You already have a CAC integration. Ask who builds the replacement and what happens to coding in the interim.
Best alternatives to 3M and Optum CAC
Six alternatives. Statements come from each vendor's own product pages, reviewed November 2 to 6, 2026, and none is independently verified. Each profile notes what that option replaces: the tool, the workflow, or the team.
| Solution | Automation model | Code sets | Auditability |
|---|---|---|---|
| MediCodio AI | Explicitly stated: AutoPilot codes complete charts, CoPilot holds thin documentation for certified coder review, routing decided per chart | Explicitly stated: ICD-10-CM, ICD-10-PCS, CPT, HCPCS Level II, modifiers; 35+ specialties | Explicitly stated: each code carries its documentation passage and the compliance rule applied |
| CodaMetrix | Quoted: "Touchlessly code and bill cases with no human intervention", with "human review retained where needed" | Not publicly specified on the pages reviewed | Not publicly specified on the pages reviewed |
| Fathom | Quoted: reduce coding operations cost "by up to 50%"; method not specified | Described, but the exact scope is not specified: ICD named, CPT and HCPCS not named | Not publicly specified on the pages reviewed |
| Nym | Quoted: "Successfully coded encounters move directly to billing without human review", with encounters needing judgment "routed to coders" | Not publicly specified on the pages reviewed | Quoted: "creates a traceable rationale behind every code assigned" |
| Arintra | Quoted: "82–86% flow through automatically", the rest routed to coders’ work queues | Not publicly specified on the pages reviewed | Described: every code traces back to the parts of the note that justify it, with an audit trail in the EHR |
| AGS Health | Described: autonomous coding, computer-assisted coding and computer-assisted professional coding offered alongside an outsourced coding service | Not publicly specified for the coding service; the site publishes ICD-10-CM and CPT educational content, which is separate from service scope | Not publicly specified on the pages reviewed |
Cells marked Quoted reproduce the vendor’s own wording. Explicitly stated means the capability is named on the page in the vendor’s own terms. Described, but the exact scope is not specified means the capability is referenced without enough detail to compare. Not publicly specified on the pages reviewed means the page does not address it, which is not evidence that the capability is absent.
MediCodio AI
For a team already running CAC, the question is less what the software does than what the first few months look like. Your coders keep the queue they have. What shifts, gradually, is how much of it arrives already finished. The CODIO AI engine reads the note and assigns the codes.
Two consequences matter when you are leaving CAC. Review stops being a step that every chart passes through and becomes a destination for the ones that need it, which is a different staffing shape from the one CAC assumes. And the boundary is yours: which chart types code without a coder is settled by your own audit results, specialty by specialty, and a decision that does not hold up is reversed the same way it was made.
Teams that would rather not operate any of this can buy the output instead of the system, through MCaaS, or Medical Coding as a Service , where MediCodio AI's own coders run the workflow.
CodaMetrix
CodaMetrix states that "CMX CARE™ helps create a more connected model for inpatient professional fee coding." CMX Automate is described as coding and billing cases touchlessly with no human intervention, and CMX Amplify feeds coder-reviewed decisions back into the platform so corrections shape later automation. It names Rosetta as its Coding Quality Framework and states it is Epic Toolbox Approved.
Code sets are not publicly specified on the page, and human review is described as "retained where needed" without a stated trigger, so establish both for your service lines.
Fathom
Fathom states it "provides both facility and professional coding to the nation’s largest health systems across service lines," and names health systems, physician groups, outpatient ambulatory clinics, health plans and RCM vendors as audiences. It publishes a cost reduction figure of "up to 50%" without a stated method. ICD is the only code set named on the page; CPT and HCPCS are not named, so the exact coding scope is not specified.
Worth noting that the role differs by segment. For outpatient ambulatory clinics the page describes using Fathom to "review the work of your coding team, editing errors and flagging problematic coding for review," which is a quality-assurance role rather than primary coding. Confirm which applies to your book.
Nym
Nym states the automation boundary directly: "Successfully coded encounters move directly to billing without human review," and "Encounters that are missing information or require additional judgment are routed to coders." Its Clinical Language Understanding technology "combines machine learning with rules-based clinical ontologies," and it states it "creates a traceable rationale behind every code assigned."
Published results are emergency department and no other setting is named, so ask for production evidence in your service lines. No code sets are named on the page.
Arintra
Arintra describes an agentic platform under the heading "One platform. Every care setting," listing ambulatory, emergency, diagnostic and inpatient, with "23+ specialties and counting." It states that "82–86% flow through automatically, claims out the door; the rest route to your coders’ existing work queues with a full explanation for review." Every code traces back to the parts of the note that justify it, with the audit trail inside the EHR, and it states HITRUST e1 certification.
Code sets and specific compliance edits are not publicly specified on the page.
AGS Health
AGS Health splits coding into risk adjustment, facility and professional fee services with medical code auditing alongside, and pairs them with its own AI platform covering autonomous coding, computer-assisted coding and computer-assisted professional coding. It publishes ICD-10-CM and CPT educational material. That content sits apart from the service description, so it indicates coding-specific focus rather than establishing which code sets the coding service covers.
The service structure is the distinguishing feature here: coding is bought as delivered work rather than as a system your team operates, which suits organizations whose constraint is coder capacity rather than coding software.
Coder credentials, QA methodology and security certifications are not publicly specified on the pages reviewed, so establish all three during procurement.
Traditional CAC, AI coding and managed coding compared
| Traditional CAC | AI medical coding | Managed coding services | |
|---|---|---|---|
| What it does | Proposes codes from documentation | Codes eligible charts outright, routes the rest | Supplies coders, increasingly with AI behind them |
| Who touches each chart | Typically, a coder reviews the suggested codes | A coder on exceptions only | The provider's coders |
| Capacity scales with | Coder headcount | The share of charts that qualify, which depends on your documentation | The provider's staffing |
| Main buyer question | Is it faster per chart? | Which of my charts qualify, and who decides? | What are the credentials and the SLA? |
The categories overlap more than vendor marketing suggests. Solventum describes "expert-guided artificial intelligence" inside its CAC module, and AGS Health sells autonomous coding inside a service. What separates them is who carries the risk when a chart is ambiguous.
How to choose, by organization type
RCM and billing companies need capacity that grows without a hiring cycle. Ask about multi-client configuration and which specialties are live in production.
Hospitals and health systems find integration harder than the coding engine. If inpatient is in scope the field narrows: Solventum covers inpatient and outpatient facility coding, CodaMetrix inpatient professional fee, Arintra lists inpatient, and MediCodio AI states inpatient through professional fee.
Ambulatory surgery centers code operative notes with small teams, where one absent coder stops billing. Confirm ASC facility claims and packaging rules, and ask which NCCI edit file the vendor checks.
Physician groups and practices need turnaround and continuity. Ask about minimum volume, since several options here are built for health system scale.
MediCodio AI publishes coverage for all four, including ambulatory surgery centers, which the other options here do not name on the pages reviewed. It is also the only one offering the same coding as software or as a managed service, so a single provider can cover a mixed book. Whether it fits yours still depends on your specialty mix and volumes, which a sample run settles faster than a feature list.
Frequently asked questions
Is 3M CAC now Solventum?
Yes. Solventum’s product page states the system "was previously 3M™ 360 Encompass™ Computer-Assisted Coding (CAC)." Documentation, support and roadmap now come from Solventum, even though many buyers and vendor lists still use the 3M name.
What is the difference between CAC and autonomous medical coding?
CAC proposes codes and a coder reviews every chart, so the gain is minutes per chart. Autonomous coding releases codes on eligible charts and routes the rest to coders. The difference is whether your coder count has to grow with volume.
Can an AI coding platform replace a CAC system entirely?
For the charts it codes autonomously, yes. The rest route to coders, so credentialed capacity is still needed. How much of your volume qualifies depends on documentation quality and specialty mix, which is why a sample run matters more than a published rate.
Which alternatives handle inpatient coding?
Solventum covers inpatient and outpatient facility coding, CodaMetrix inpatient professional fee, Arintra lists inpatient among its settings, and MediCodio AI states coverage across inpatient, outpatient, ED and professional fee . Confirm ICD-10-PCS and DRG capability before shortlisting.
How do I compare accuracy claims between coding vendors?
Ask what was measured, on whose charts, against what reference, and whether before or after correction. Published percentages are rarely comparable, so test on your own charts. An independent coding audit will tell you your current baseline.
If you want automation and credentialed review from one provider, then book a demo . Head-to-head detail sits on the MediCodio vs Solventum CodeFinder and MediCodio vs CodaMetrix pages, and the category overview is on computer-assisted coding software .
Sources
- MediCodio AI: https://www.medicodio.ai/product
- Optum Professional CAC: https://business.optum.com/en/operations-technology/revenue-cycle-management/medical-coding/professional-cac.html
- Solventum 360 Encompass CAC: https://www.solventum.com/en-us/home/health-information-technology/solutions/360-encompass-cac/
- CodaMetrix: https://www.codametrix.com/
- Fathom: https://www.fathomhealth.com/
- Nym: https://nym.health/
- Arintra: https://www.arintra.com/
- AGS Health: https://www.agshealth.com/services/him-and-clinical-services/medical-coding-services/