By specialty
CRNA Credentialing Services
Certified registered nurse anaesthetists enrol in Medicare individually on the CMS-855I and reassign benefits to their group or facility. What is paid depends on the anaesthesia modifier reported: a CRNA working without medical direction bills the full amount under one modifier, while a medically directed case splits payment between the CRNA and the anaesthesiologist. Texas has not opted out of the supervision requirement.
Anaesthesia is the specialty where credentialing and billing are least separable. In most fields the credentialing question is is this clinician in the network. In anaesthesia there is a second question layered on top — who else was in the room, and in what capacity — and the answer changes who bills, what modifier is reported, and how a single anaesthetic is paid.
One anaesthetic, several possible claims
The Medicare anaesthesia modifier set is a structured description of case staffing, and the payment follows the description:
- A CRNA delivering the anaesthetic without medical direction reports the non-medically-directed modifier, and the service is paid in full to whichever entity holds the reassignment.
- A medically directed case produces two claims — the anaesthesiologist’s and the CRNA’s — each with its own modifier, with the payment divided between them.
- An anaesthetic personally performed by an anaesthesiologist has its own modifier again.
- Medical supervision, where a physician is involved in more concurrent cases than medical direction permits, is a separate modifier and is paid differently and less favourably.
None of these is a billing preference. Each is a factual claim about how the case was staffed, and the anaesthesia record has to support the one reported. Practices that select a modifier by habit — or by group default — rather than by case are making an assertion about physician involvement that a reviewer can test against the record.
Medical direction has conditions, and they are the reason for the split
The split payment in a medically directed case is not a courtesy division. It is payment for a defined set of physician activities: the pre-anaesthetic evaluation, prescribing the plan, personal participation in the demanding portions including induction and emergence, ensuring that any procedures the physician does not perform are performed by a qualified individual, monitoring at frequent intervals, remaining physically available for emergencies, and providing indicated post-anaesthesia care — across no more concurrent cases than the rule allows.
Two consequences follow that matter to a CRNA group.
First, staffing ratios are a payment structure, not just a rota. A physician directing more concurrent cases than medical direction permits has moved the entire day into medical supervision, which pays differently, whether or not anyone updated the billing.
Second, the documentation has to show it. The conditions are auditable, and the audit is a document review. Groups that meet every condition clinically and record none of them are in the same position as groups that met none.
Texas has not opted out
Federal rules let a state’s governor exempt the state from the physician supervision requirement for CRNAs in hospitals, critical access hospitals and ambulatory surgical centres, after consulting the boards of medicine and nursing. Many states have done so. Texas has not.
Two clarifications, because this is regularly muddled:
- Supervision here is a facility condition of participation, not a nursing licensure rule. It constrains the facility’s compliance posture, and facilities enforce it accordingly.
- Supervision and medical direction are not the same thing. A case can satisfy the supervision requirement without meeting the seven conditions for medical direction. Payment follows medical direction, not supervision, so a group can be entirely compliant with the supervision requirement and still be billing a case incorrectly.
CRNAs moving to Texas from an opt-out state frequently arrive with a mental model formed under different rules, and the correction is best made during credentialing rather than during an audit.
Individually credentialed, or covered by the group?
This varies more in anaesthesia than in almost any other specialty, and it determines where the work goes.
Some commercial payers credential CRNAs individually, issue participation in their own name, and expect an application, a CAQH file and a hundred-and-fifty-day cycle. Others do not credential CRNAs individually at all — anaesthesia services are delivered under the group’s contract, and the CRNA is rostered against the group’s tax ID rather than paneled.
Medicare is unambiguous: the CRNA enrols individually on the CMS-855I and reassigns benefits on the 855R to whoever bills. Texas Medicaid likewise expects the individual enrolment and the linkage.
The practical instruction is to establish, payer by payer, which model applies before assuming a timeline. Both models fail identically when nobody checks — the cases are worked, the claims go out, and the denials arrive weeks later citing a rendering provider the payer does not recognise against that group.
Privileges are a separate file at every site
Payer credentialing establishes network participation. Privileging is a facility’s governing body granting permission to practise in its building under its bylaws, with its own verification, its own committee and its own reappointment cycle.
A CRNA covering four hospitals and two surgery centres carries six privileging files on six clocks. Each has a reappointment date that will not coordinate with the others or with any payer cycle, and a lapse at one site removes coverage at that site regardless of payer standing. Anaesthesia groups feel this more than most specialties because coverage is distributed and schedules are built weeks ahead against assumed availability.
Groups that track privileging expirations with the same discipline as payer recredentialing avoid a recurring and entirely predictable scramble. Groups that do not spend a few days each quarter rebuilding a schedule around a lapse that was visible six months earlier.
Adding a facility is three things at once
When a group takes on a new hospital or surgery centre, three separate processes have to complete before the first case is both safe to staff and payable: privileges at the facility, the location added to the relevant payer records, and confirmation that the group’s contracts cover services delivered at that site.
They run on different clocks and are owned by different people, which is why new site coverage so often starts with a month of cases that cannot be billed cleanly. Sequencing them deliberately, from the date the facility agreement is signed rather than from the date the schedule needs filling, is the whole fix.
Texas specifics
Licensure is verified against the Texas Board of Nursing — the APRN recognition and the underlying registered nurse licence are both pulled, and both have to be current. Where prescriptive authority is part of the role, the delegation arrangement is verified as well, and payers will ask for it in the credentialing packet rather than taking it as read.
Texas Medicaid enrolment runs through TMHP’s PEMS portal for the individual and the group, and it has to close before any Medicaid managed care organisation begins. For groups covering facilities across several Texas metros, note that payer network participation is regional even when contracts are statewide, and a group expanding from Houston into San Antonio should confirm coverage rather than assume it.
How we work a CRNA file
We start by establishing the payer model — individually credentialed or covered by the group — because that determines whether the next ninety days are applications or linkage confirmations. Medicare enrolment and reassignment in parallel. Privileging tracked per facility on its own calendar rather than folded into the payer schedule. And the modifier structure reviewed against how the group actually staffs its cases, because in anaesthesia the credentialing file and the billing pattern have to describe the same practice.
What a payer actually verifies
Every item below is pulled from its primary source, not taken on your word. A gap in any one of them stalls the file without a rejection letter.
| What they check | Where it comes from |
|---|---|
| Texas advanced practice registered nurse licence with CRNA recognition | Texas Board of Nursing licence verification |
| Registered nurse licence underlying the APRN recognition | Texas Board of Nursing, verified separately from the APRN role |
| National certification and recertification as a nurse anaesthetist | The national certifying body's public verification record |
| Nurse anaesthesia programme completion | Programme registrar or the payer's contracted verification organisation |
| Prescriptive authority and the delegation agreement, where applicable | Texas Board of Nursing record and the signed agreement itself |
| DEA registration, where controlled substances are prescribed | DEA registration verification |
| Malpractice coverage, limits, and claims history | Certificate of insurance from the carrier |
| Adverse action and licensure history | National Practitioner Data Bank |
| Exclusion and sanction screening | OIG LEIE, SAM.gov, and the Texas OIG exclusion list |
| Facility privileges at every site where cases are performed | Each hospital's or ASC's medical staff office |
What the timeline actually looks like
| Step | Typical | What decides it |
|---|---|---|
| CAQH profile built and attested | 1–2 weeks | Read by the commercial payers that credential CRNAs individually. Not all of them do, which is worth establishing before assuming a timeline. |
| Medicare enrolment — CMS-855I and CMS-855R | 45–90 days | Novitas Solutions for Texas. Individual enrolment plus reassignment to the anaesthesia group or facility that bills. |
| Facility privileging at each site | 60–120 days per facility | Separate from payer credentialing and controlled by each facility's medical staff process. A CRNA covering four hospitals runs four of these. |
| Commercial payer credentialing | 90–150 days | Where the payer credentials CRNAs individually. Where it does not, the CRNA is covered by the group contract and the work shifts to roster linkage instead. |
| Texas Medicaid — TMHP PEMS, then MCO contracts | 45–90 days, then 30–90 each | Individual and group enrolment, with the same linkage discipline as everything else in anaesthesia. |
| Adding a new facility to an established file | 30–90 days | Privileges, payer location updates and the group's contract coverage all have to move together, which is the usual reason a new site starts slowly. |
The services that matter most here
Insurance credentialing
Establishing which payers credential CRNAs individually and which cover them under the group contract, then filing accordingly.
How it works →Hospital privileging
Every hospital and surgery centre runs its own medical staff process, and a CRNA covering multiple sites runs one per site.
How it works →Medicare & Medicaid enrollment
The CMS-855I, reassignment to the billing entity, and TMHP PEMS with the linkage that makes the claims payable.
How it works →Medical billing & RCM
The anaesthesia modifier set and time units are where the payment is decided, and where documentation and billing have to agree.
How it works →Pricing is quoted per practice — payers, providers, and states drive it — and your exact number goes in writing before you commit.How pricing works →
Common questions
What do the anesthesia modifiers actually control?
What is medical direction and why does it have conditions attached?
Has Texas opted out of the CRNA supervision requirement?
Do commercial payers credential CRNAs individually?
Why does a CRNA need privileges at every facility?
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