1. Clean claim rate
MAP Key CL-1
- Claims passing edits with no manual intervention over claims accepted; measure at the clearinghouse [2]
- Definition: clean claim rate
Guide · Revenue cycle metrics
Mental health billing KPIs: eight numbers a group practice should pull from the 835 every month
Short answer: not forty tiles. Eight numbers computed from the payer's own remittance, with the HFMA MAP Key definition where one exists and the denial codes that carry the dollars in behavioral health.
835 · 837 · charge ledger
By payer class · by clinician
KPIs
8
Source
835 · 837 · charges
Framework
HFMA MAP Keys
Codes
CARC 197 · 198 · 29
Audience
Group practices
Cadence
Monthly
8KPIs
From the 835, 837 and charge ledger, by payer class and clinician [2]
197and 198
The authorization CARCs that decide most BH denial dollars [1]
7calendar days
Standard PA decision limit owed by MA and Medicaid managed care since January 1, 2026 [3]
52.9%
Over-90 insurance A/R at transition in one BH and SUD baseline, against a 30% ceiling; not a benchmark
The payer's record
A group practice with 10 to 60 clinicians usually trusts one report: the deposit. The PM system counts what staff typed; the 835 is the payer's record of what was allowed, adjusted, denied and paid [1]. MAP Key definitions used where they exist [2].
| 835 element | What it tells you | Feeds |
|---|---|---|
| CLP02 claim status (1 paid, 2 paid secondary, 4 denied, 22 reversal) | Whether the claim paid, denied or reversed | Denial rate, reversal tracking |
| CLP03 charge, CLP04 paid | Billed versus paid at claim level | Collection rate, underpayment variance |
| SVC01 procedure, SVC02 charge, SVC03 paid | The same at the line, by CPT or HCPCS | Per-code allowed versus contract |
| CAS group code (CO, PR, OA, PI) and CARC | Why the payer adjusted the line | Denial reason mix, patient responsibility [1] |
| DTM dates | Date of service and payment date | Days to pay, aging |
| AMT allowed amount | What the payer considers allowed | Underpayment against the fee schedule |
Five MAP Keys, three of our own
2. Remittance denial rate
MAP Key AR-5
- Claims denied over claims remitted, counting actionable denials, initial and appeal
- Pull CLP02 = 4 and CO or PI lines with denial CARCs [2]
3. Authorization denial share
Our operating measure
- Dollars adjusted under CARC 197 (authorization absent) and 198 (authorization exceeded) over total denied dollars
- Behavioral health lives or dies on this one [1]
4. Timely filing loss
Our operating measure
- Dollars written off under CARC 29 as a share of charges
- Should be near zero; anything else is an operations failure, not a payer decision [1]
5. Net days in A/R
MAP Key FM-1
- Net patient receivable on the balance sheet over the most recent three-month daily average of net patient service revenue [2]
6. Aged A/R over 90 days
MAP Key AR-3
- Aged A/R by bucket as a percentage of total; read 91 to 120 and over 120 together as the over-90 share
- Split it by payer class [2]
7. Allowed versus contract variance
Our operating measure
- For each CPT and payer, 835 allowed amount against the contracted rate, by month
- The measure that found the gap in our parity underpayment case study
8. Cash collection as a % of net revenue
MAP Key FM-2
- Patient service cash collected in the month, inclusive of refunds, over the most recent three-month average of net patient service revenue [2]
Nine CARCs
Every payer uses the CARC list differently, but the dollars concentrate in a handful of codes. Map these first [1].
| CARC | X12 description (abridged) | Usual root cause in BH | Owner |
|---|---|---|---|
| 197 | Precertification/authorization/notification/pre-treatment absent | No auth on file, or auth under a different clinician | Authorization desk |
| 198 | Precertification/notification/authorization/pre-treatment exceeded | Units or dates past the approval | Authorization desk |
| 4 | Procedure code inconsistent with the modifier used | Telehealth modifier on the wrong code, or missing | Coding |
| 16 | Claim/service lacks information or has submission/billing error(s) | Rendering NPI, taxonomy or diagnosis missing | Front end |
| 29 | The time limit for filing has expired | Claim built late or held on a credentialing queue | Billing manager |
| 45 | Charge exceeds fee schedule/maximum allowable or contracted arrangement | Normal contractual; watch the allowed amount instead | Nobody, unless allowed is below contract |
| 96 and 204 | Non-covered charge; service not covered under the current benefit plan | Benefit not verified, carve-out payer | Eligibility desk |
| 109 | Claim/service not covered by this payer/contractor | Behavioral health carve-out, wrong payer billed | Eligibility desk |
| 242 | Services not provided by network/primary care providers | Clinician not yet enrolled with the plan | Credentialing |
Takeaway
The CARC tells you which desk owns the denial. Group codes tell you who pays for the mistake: CO is yours, PR is the patient's, PI is a payer-initiated reduction you can argue.
No unsourced benchmarks; the direction that matters
The right range depends on payer mix; what matters is your own number, by payer class, month over month.
Clean claim rate
Falling month over month means a template or enrollment change broke something.
Authorization denial share
Any rise after a payer policy change points at the auth grid. Since January 1, 2026 MA and Medicaid managed care plans owe standard decisions in 7 calendar days, so slow decisions are the payer's to explain [3].
Timely filing loss
Any amount above zero is the KPI to work first. The Medicaid behavioral health filing clock has the carve-out deadlines.
Allowed versus contract
A therapy-code variance wider than the E/M variance at the same payer is the parity signal. The parity playbook explains what to do with it.
Over-90 A/R
A Medicaid MCO book aging while commercial does not usually means enrollment or carve-out routing.
Denial rate
Count actionable denials only, as the MAP Key does, or zero-pay information lines swing the number [2].
One public reference point
Over-90 insurance A/R at transition, behavioral health and SUD baseline case study; $1.04M sat in one return-for-credentialing queue
52.9%Measuredone organization, at transition
30%Glidepath ceilingnegotiated
The clock beside the authorization KPI
CMS-0057-F limits since January 1, 2026 [3]
72 hExpedited43% of standard
168 hStandard7 calendar days
Five steps, one page to the owners
1
Load every 835 into one table
Including zero-pay and reversal files; most PM systems skip reversals.
2
Join to the 837 by claim control number
Each denial then carries clinician, payer, CPT and date of service.
3
Compute the eight KPIs by payer class and by clinician
One page to the owners, with the month-over-month arrow.
4
Route each CARC family to its owner
With a count and a dollar value; close the loop at next month's number.
5
Keep the payer's own published PA metrics beside your authorization KPI
CMS-0057-F required the first public set by March 31, 2026 [3].
Four moves
Export last month's 835 files, including reversalsThen run the worksheet in the behavioral health RCM toolkit.
Sum CARC 197 and 198 dollars over total denied dollarsYour authorization denial share; it moves first.
Check CARC 29 for anything above zeroWork timely filing loss first.
Pick the version that fits your bookOut-of-network or superbills: insurance billing for therapists; how we report it to clients: mental health billing services.
Frequently asked questions
What is a good clean claim rate for a mental health practice?
Use the HFMA MAP Key definition, claims passing edits with no manual intervention divided by claims accepted into the claims tool, and measure it at the clearinghouse. We do not publish a benchmark percentage we cannot source; the useful comparison is your own rate by payer class, month over month, and whether it falls after a template or enrollment change.
Which denial codes matter most in behavioral health?
CARC 197 (authorization absent) and 198 (authorization exceeded) usually carry the most dollars, followed by 29 (timely filing), 16 (missing information), 4 (code and modifier inconsistent), 109 (not covered by this payer, often a carve-out) and 242 (provider not in network, often an enrollment gap).
How do I calculate net days in A/R?
HFMA MAP Key FM-1: net patient receivable on the balance sheet divided by the most recent three-month daily average of total net patient service revenue. Exclude self-pay if you want a payer-performance view, and say which version you are reporting.
Why compute KPIs from the 835 instead of the practice management system?
The 835 is the payer's record of what it allowed, adjusted, denied and paid, with a CARC and group code on each adjustment. The PM system records what staff entered. When the two disagree, the 835 is the one the payer will stand behind in an appeal.
- X12: Claim Adjustment Reason Codes (CARC) and Claim Adjustment Group Codes
- HFMA MAP Keys: revenue cycle key performance indicator definitions
- CMS fact sheet: Interoperability and Prior Authorization Final Rule, CMS-0057-F (January 17, 2024)
- 42 CFR 438.210, Coverage and authorization of services (Medicaid managed care), govinfo.gov
Checked October 25, 2026. Confirm against the source; items marked proposed may change in the final rule.
Want the eight numbers run on your last 90 days?
Send the 835 files and the charge ledger. We return the eight KPIs by payer class, the CARC map with owners, and three things to fix first.