CHAMPVA Inpatient Cost Sharing: DRG vs. Non-DRG Rules

Quick answer

CHAMPVA does not apply the annual outpatient deductible to inpatient services. But inpatient cost sharing is not always calculated the same way as a routine outpatient office visit.

When CHAMPVA is the primary payer:

• DRG-based inpatient hospital care: your CHAMPVA cost share is the lesser of (1) the applicable per-day amount multiplied by the number of inpatient days, (2) 25% of the hospital's billed amount, or (3) the base CHAMPVA DRG rate.
• Non-DRG inpatient care: VA's current CHAMPVA Guidebook generally lists no deductible and a 25% cost share of the CHAMPVA allowable amount.
• Low-volume inpatient mental-health hospitals or units: a separate rule uses the lesser of the fixed per-day amount times the inpatient days or 25% of the hospital's billed charges.
• If CHAMPVA is secondary or tertiary, VA says the beneficiary pays nothing in most cases, with CHAMPVA paying up to its allowable amount after the other payer has acted.

That is why two inpatient stays with similar billed charges can produce different CHAMPVA patient responsibility. The hospital's reimbursement method matters.

Why inpatient cost sharing is different from routine outpatient cost sharing

For ordinary CHAMPVA care, 38 CFR § 17.274 generally sets the beneficiary cost share at 25% of the CHAMPVA-determined allowable amount after any applicable annual outpatient deductible.

Inpatient services are different in two important ways:

1. The annual outpatient deductible is waived for inpatient services.
2. Some inpatient hospital claims use special cost-share formulas instead of a straight 25% of the allowable amount.

For comparison, routine deductible-applicable outpatient care generally uses the $50 individual/$100 family annual deductible before the usual cost share. See CHAMPVA Deductible: $50 Per Person, $100 Per Family and CHAMPVA Cost Share: How the Usual 25% Works.

DRG-based inpatient hospital care

A Diagnosis Related Group (DRG) is a hospital payment classification that groups an inpatient stay based on the diagnosis, severity, procedures, and other clinical factors. Under 38 CFR § 17.275, most non-mental-health inpatient hospital services in the 50 states, District of Columbia, and Puerto Rico use CHAMPVA's DRG-based reimbursement methodology unless an exception or another payment method applies.

For an inpatient service that is subject to the CHAMPVA DRG payment system, 38 CFR § 17.274(e)(1) says your cost share is the lowest of:

• the applicable per-day rate multiplied by the number of inpatient days;
• 25% of the hospital's billed amount; or
• the base CHAMPVA DRG rate.

This is a lesser-of formula. It is not the same as simply taking 25% of the hospital bill, and it is not the same as automatically taking 25% of the DRG allowable amount.

VA's current CHAMPVA Guidebook presents the same DRG-based rule and confirms that there is no deductible for the inpatient stay.

Non-DRG inpatient care

Not every inpatient facility is paid through the standard DRG method.

Section 17.275 uses other reimbursement methodologies for certain settings. For example, some hospitals or services that are exempt from DRG payment can use a cost-to-charge (CTC) method. The regulation lists categories that can include critical access hospitals, long-term care hospitals, rehabilitation hospitals, certain cancer hospitals, non-Medicare-participating hospitals, certain non-VA federal facilities, and other specified facilities or services.

For inpatient services that are not DRG-based, VA's current CHAMPVA Guidebook lists:

• no deductible; and
• 25% beneficiary cost share, with CHAMPVA generally paying 75% of the allowable amount when it is primary.

The practical point is that the facility's payment classification can change the way the claim is calculated even though both encounters are called “inpatient.”

Inpatient mental-health care has another important split

The regulation has a special cost-share rule for low-volume inpatient mental-health hospitals and units, defined in § 17.274 as facilities with fewer than 25 mental-health discharges per federal fiscal year.

For those low-volume facilities, the beneficiary cost share is the lesser of:

• the fixed per-day rate multiplied by the number of inpatient days; or
• 25% of the hospital's billed charges.

VA's Guidebook separately describes high-volume inpatient mental-health facilities and residential treatment centers as having no deductible and a 25% cost share of the allowable amount when CHAMPVA is primary.

Mental-health admission and preauthorization rules are separate from cost sharing. A service can be covered and have a defined cost-share formula while still being subject to a preauthorization requirement.

One hospital stay can generate more than one type of claim

Do not assume every charge connected with an inpatient admission is part of one DRG calculation.

Section 17.275 separates inpatient hospital facility services from non-hospital professional services. Individual physicians and other authorized non-VA professionals—including services such as anesthesia, laboratory work, and other separately billed professional fees—can have their allowable amounts calculated under a different reimbursement method.

That means an inpatient episode can produce separate claims or EOB lines for:

• the hospital facility;
• the surgeon or attending physician;
• anesthesia;
• radiology or pathology;
• laboratory services; and
• other independently billed professionals.

The special DRG lesser-of formula should not be assumed to apply to every separately billed professional line. If the EOB looks inconsistent, compare the claim type and provider before comparing the cost-share amount.

For background on how CHAMPVA determines payment amounts, see What Is the CHAMPVA Allowable Amount?.

What happens to emergency-room charges if you are admitted?

VA's Guidebook specifically distinguishes an emergency-room visit that remains outpatient from one that becomes part of an inpatient admission.

If, after you are stabilized, you are admitted to the hospital, the Guidebook says the emergency-room charges are included in the inpatient charge and your payment is based on the inpatient-services rules.

If you are not admitted, the emergency-room charges remain subject to the applicable outpatient rules.

This distinction can affect both the deductible and the cost-share calculation, so the final claim classification matters more than the fact that care began in the emergency department.

Other health insurance can change what you actually owe

The formulas above describe CHAMPVA when it is the responsible primary payer. If you have other health insurance, that plan will usually pay before CHAMPVA unless one of CHAMPVA's primary-payer exceptions applies.

VA's Guidebook says that when CHAMPVA is secondary or tertiary, the patient pays nothing in most cases and CHAMPVA may pay up to 100% of the allowable amount after the other payer has processed the claim.

That is not a guarantee of a zero balance for every claim. Coverage differences, excluded services, amounts above the allowable amount, missing coordination-of-benefits information, and the other plan's adjudication can affect the result.

The $3,000 catastrophic cap still matters

Your qualifying CHAMPVA beneficiary cost-share amounts count toward the $3,000 family catastrophic cap for the calendar year.

After the family reaches that cap, CHAMPVA pays the full allowable amount for remaining CHAMPVA-covered services and supplies through the end of the calendar year. Amounts above the CHAMPVA allowable amount and costs for noncovered care do not count toward the cap.

See CHAMPVA Catastrophic Cap: How the $3,000 Family Limit Works for the full rule.

Hospital assignment and balance billing are separate from your cost share

A provider's billed charge, the CHAMPVA allowable amount, and your CHAMPVA cost share are different numbers.

Under 38 CFR § 17.272(b), a Medicare-participating hospital must accept the CHAMPVA-determined allowable amount as payment in full for inpatient services furnished to a CHAMPVA beneficiary.

That hospital-acceptance rule is separate from the formula CHAMPVA uses to calculate your cost share. For the details and what to do if a hospital refuses, see When Medicare-Participating Hospitals Must Accept CHAMPVA.

A practical way to review an inpatient CHAMPVA bill

When an inpatient EOB or bill arrives, check these items in order:

1. Was the care classified as inpatient? If it remained observation or outpatient care, different deductible and payment rules may apply.
2. Is the claim a hospital facility claim or a separate professional claim?
3. For the hospital claim, was it DRG-based or non-DRG?
4. If it was DRG-based, does the beneficiary amount reflect the lesser-of formula?
5. Was other health insurance billed first when required?
6. Has your family reached or approached the $3,000 catastrophic cap?
7. Is the provider attempting to collect an amount above what CHAMPVA rules permit?

If the answer is still unclear, use the CHAMPVA EOB and the provider's itemized bill together. The EOB is the better starting point for identifying the allowable amount and how CHAMPVA adjudicated each claim line.