Mythos
Billing Guides & Advice

Helpful insights on behavioral health billing.

Simple, practical guides written by our billing team. Click any card to read the full story.

Billing Setup 6 min read
PAYER ROUTING
Medical vs. Behavioral Payer
REDIRECTEDCARVE-OUT

Behavioral Health Carve-Outs: Who Actually Pays the Claim?

Behavioral health carve outs explained: how to read the insurance card, where to send claims and authorizations, and why credentialing is often separate.

JAN 2027Read Guide
Compliance 6 min read
SUD RECORDSSECURE
Managing TPO consent for Part 2 billing
2024 FINAL RULECOMPLIANT

42 CFR Part 2 and Billing for Substance Use Disorder Treatment

42 CFR Part 2 billing explained: which SUD records are covered, how the 2024 final rule changed consent for payment, and what it means for vendors.

MAR 2027Read Guide
Audits 6 min read
MEDICAL REVIEW
Documenting 60-min psychotherapy
THRESHOLD53+ MINS

Payer Audits of 90837: Why They Happen and How to Prepare

A 90837 audit can lead to downcoding or recoupment. Learn why payers review 60-minute psychotherapy, what documentation holds up and how to respond.

JAN 2027Read Guide
Coding 6 min read
TIME RULESCPT
9083438 - 52 MINS
9083753+ MINS

90837 vs 90834: Time Rules, Documentation and Audit Risk

90837 vs 90834 explained for group practices: the time thresholds, what your notes must show, why payers review 90837, and how to bill with confidence.

OCT 2026Read Guide
Coding 6 min read
FAMILY THERAPY
Conjoint Psychotherapy Rules
MODALITY90846 / 90847

90846 vs 90847: Billing Family Psychotherapy

90847 billing made clear: 90846 vs 90847, who the billed patient is, time rules, payer coverage limits and documentation for family psychotherapy.

DEC 2026Read Guide
Revenue 6 min read
REVENUE CYCLEACTIVE
Accounts Receivable Aging Analysis
BACKLOG REVIEW90+ DAYS

Cleaning Up AR Over 90 Days: A Step-by-Step Playbook

A step-by-step playbook for cleaning up AR over 90 days: triage by deadline and balance, appeal or write off, and prevent it from recurring.

DEC 2026Read Guide
Compliance 6 min read
SELF AUDIT
Internal claim documentation review
STATUSPASSED

A Self-Audit Checklist for Behavioral Health Billing

A practical billing audit checklist for therapy and psychiatry groups: how to sample claims, test documentation, time, modifiers and credentialing.

JAN 2027Read Guide
Coding 6 min read
90785 RULESCPT
Interactive Complexity Add-On

90785 Interactive Complexity: When It Applies and When It Doesn't

Interactive complexity 90785 explained: the four qualifying factors, which codes it attaches to, where it cannot be billed and how to avoid audit risk.

NOV 2026Read Guide
Coding 6 min read
INTAKE BILLING
Diagnostic Evaluations
CODES90791 / 90792

CPT 90791 Billing Guide: Diagnostic Evaluations Done Right

90791 billing for group practices: 90791 vs 90792, frequency limits, same-day rules, documentation and the denials that catch intake evaluations.

OCT 2026Read Guide
Compliance 6 min read
ASSOCIATESCOMPLIANCE
Pre-licensed billing paths

Can You Bill Insurance for Pre-Licensed Therapists and Associates?

Billing for associate therapists depends on the payer and state. Learn the Medicare incident-to limits, supervision billing risks and how to verify rules.

JAN 2027Read Guide
Credentialing 6 min read
CAQH PROVIEW
Provider Data Portal
CYCLE120 DAYS

CAQH ProView for Therapists: Setup, Attestation and Common Mistakes

CAQH for therapists made simple: how to set up the profile, attest every 120 days, authorize payers and avoid lapses that quietly stall claims.

NOV 2026Read Guide
Strategy 6 min read
PAYER MIXSTRATEGY
Panel Selection & Negotiation

How to Choose Insurance Panels for a Group Therapy Practice

Deciding which insurance panels to join? Score payers on local demand, reimbursement, admin burden and panel status, then negotiate with your own data.

DEC 2026Read Guide
Denials 6 min read
CLAIM DATA
Missing or invalid info
DENIALCO-16

CO-16 Denial: Fixing Missing or Incomplete Claim Information

CO-16 denial code means claim information is missing or invalid. Learn to read the remark code, fix common behavioral health causes and prevent repeats.

OCT 2026Read Guide
Denials 6 min read
COORDINATIONCOB
Primary vs Secondary Payer
DENIAL CODECO-22

CO-22 Coordination of Benefits Denials in Mental Health Practices

A CO-22 denial means another plan may be primary. Learn the birthday rule, the intake questions that prevent COB denials and the right resubmission order.

NOV 2026Read Guide
Denials 6 min read
NECESSITY
Clinical Doc Support
DENIALCO-50

CO-50 Medical Necessity Denials for Psychotherapy

Medical necessity for psychotherapy depends on the treatment plan, measurable goals and progress notes. Learn why CO-50 denials happen and how to appeal.

DEC 2026Read Guide
Denials 6 min read
AUTHORIZATIONMISSING
Precertification Absent
DENIAL CODECO-197

CO-197 Denials in Therapy Practices: Authorization Missing

CO-197 denial means authorization was missing. Learn why therapy practices get it, how to fix denied claims and how to stop it at the front desk.

OCT 2026Read Guide
Coding 6 min read
CoCM
Collaborative Care Billing
CODES99492-99494

Collaborative Care Model Billing: 99492, 99493, 99494

Collaborative care billing explained: who bills 99492, 99493 and 99494, monthly time rules, the consultant role and what it means for psychiatry groups.

MAR 2027Read Guide
Strategy 6 min read
DIRECT CONTRACTS
Platform vs Direct In-Network
MODELINDEPENDENT

Leaving Headway or Alma: A Playbook for Going In-Network on Your Own

Thinking about leaving Headway or Alma? Use an honest math framework, plan the credentialing timeline and cash-flow gap, and transition patients carefully.[cite: 18]

NOV 2026Read Guide
Coding 6 min read
CRISIS CODES90839 / 90840
Urgent Psychotherapy & Stabilization
MINIMUM TIME30 MINS

Crisis Psychotherapy Codes 90839 and 90840 Explained

90839 billing explained: crisis time thresholds, when to add 90840, same-day limits, telehealth and the documentation that supports a crisis claim.[cite: 19]

FEB 2027Read Guide
Metrics 6 min read
DAYS IN AR
Average Collection Cycle
TARGET30-40 DAYS

Days in AR for Mental Health Practices: How to Calculate and Improve It

How to calculate days in AR for a mental health practice, what a healthy benchmark looks like, and the specific steps that bring the number down.[cite: 20]

OCT 2026Read Guide
Compliance 6 min read
GFE COMPLIANCENO SURPRISES ACT
Self-Pay & Uninsured Estimates
DISPUTE LIMIT$400 VARIANCE

Good Faith Estimates for Group Therapy Practices: A No Surprises Act Workflow

Good faith estimate rules for therapists: who gets one, timing, contents and the $400 dispute threshold, plus a simple workflow for group practices.[cite: 21]

JAN 2027Read Guide
Billing Setup 6 min read
NPI SETUP
Type 1 vs Type 2 Mapping
TYPEGROUP / INDIV

Group NPI vs Individual NPI: Setting Up a Behavioral Health Group Practice

Group NPI vs individual NPI explained for behavioral health groups: Type 1 vs Type 2, tax ID, billing vs rendering provider and common claim errors.[cite: 22]

DEC 2026Read Guide
Coding 6 min read
GROUP THERAPYCPT 90853
Per-Patient Claim Structure
LIMITSMAX 10 PATIENTS

How to Bill Group Psychotherapy (90853)

90853 billing for group practices: per-patient claims, group size expectations, documentation for each member, 90785 and pairing groups with E/M visits.[cite: 23]

JAN 2027Read Guide
Compliance 6 min read
OFFSHORE BAA
HIPAA Safeguards & Security
RULE45 CFR 164.504

HIPAA and BAAs With Offshore Billing Vendors: A Practice Owner's Checklist

HIPAA offshore medical billing checklist for practice owners: required BAA terms, subcontractor BAAs, access controls, breach timelines and audit rights.[cite: 24]

DEC 2026Read Guide
Coding 6 min read
ICD-10 ERRORSOCT 1 RESET
Preventing Diagnosis-Based Denials

ICD-10 Coding for Mental Health: Common Errors That Cause Denials

Mental health ICD-10 codes that are unspecified, truncated or out of date trigger denials. Learn the common errors and a simple pre-submission check.[cite: 25]

MAR 2027Read Guide
Strategy 6 min read
BILLING MODEL
In-House Salary vs Outsourced Fee
ANALYSISNET RETURN

In-House vs Outsourced Billing for a Group Practice: An Honest Cost Comparison

In-house vs outsourced medical billing for therapy and psychiatry groups: salary, benefits, software, coverage gaps and a worked cost comparison.[cite: 26]

NOV 2026Read Guide
Revenue 6 min read
DEDUCTIBLE RESETQ1 CASH FLOW
Managing January Revenue Shifts

The January Deductible Reset: Cash-Flow Planning for Mental Health Practices

Prepare your therapy practice for the January deductible reset with eligibility re-verification, patient scripts and a simple Q1 cash-flow forecast.[cite: 27]

MAR 2027Read Guide
HIPAA & BAA Governed

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