The Referral That Isn’t Funded: How IHS Purchased/Referred Care Rations by Form
The Indian Health Service’s Purchased/Referred Care (PRC) program is the part of the federal Indian health system that pays outside providers for care the IHS or tribal facility cannot deliver in-house. It is also, by design, not an entitlement. The IHS states plainly that “PRC is not an entitlement program and an IHS referral does not imply the care will be paid” (IHS PRC program page). That sentence is the whole architecture in miniature. A clinician can decide a patient needs a cardiology consult, an MRI, or a joint replacement. The referral is a clinical document. Payment is a separate administrative decision governed by four gates: residency, notification, medical priority, and use of alternate resources (IHS PRC program page).
Most commentary on PRC treats the funding shortfall as the story and the paperwork as incidental. That gets the mechanism backwards. The paperwork is the rationing system. The denial letter and the deferral table are where a discretionary appropriation becomes an individual patient’s postponed surgery. If you want to redesign this, you have to read the forms as policy, not as bureaucracy.
Denial and deferral are not the same thing
The IHS manual defines deferred services as “services referred for PRC that do not meet immediate medical priority for payment guidelines for which the provision of treatment can be postponed or delayed and the service has not been provided” (IHS PRC Chapter Revisions, 2018). A deferral is a clinical rationing decision: the service is within the priority framework, but the money is not there yet. A denial is something else. It is a finding that the request failed a gate — eligibility, notification timing, prior authorization, or the availability of another payer.
When funds run out, the manual says referrals “will be denied PRC payment or deferred,” and that “no payment or promise of payment can be made when there are no funds available” (IHS PRC Chapter Revisions, 2018). The clinical referral still happens. The patient still gets sent. What disappears is the payment commitment. That distinction — referral without funding — is the operational core of the program, and it is why the denial and deferral counts have to be read separately.
The denial taxonomy is a diagnostic, not a rate
Each year the IHS collects an Unmet Need Report from PRC programs. The FY2016 data call, which is the version available in the retrieved record, lays out the denial categories that programs must report (Manual Exhibit 2-3-O). They are worth listing because each one names a different institutional failure:
- A. Eligible, but care was not within medical priority. A rationing decision. The patient qualified; the service ranked too low against the priority list.
- B. Eligible, but an alternate resource was available. A coordination decision. Medicaid, Medicare, VA, or private coverage was judged accessible, so PRC stepped back under its payor-of-last-resort rule.
- C. Patient was ineligible for PRC. An eligibility determination.
- D. Emergency notification was not provided within 72 hours. A patient-behavior gate applied to emergency care.
- E. Non-emergency care was received with no prior authorization. A process gate.
- F. Patient resided outside the PRC service delivery area. A geographic eligibility failure.
- G. An IHS facility was accessible and available. A determination that the direct-care system could have handled it.
- H. All other denials. The residual category, which is where data quality goes to hide.
Reading these as a single “denial rate” collapses at least three different things: clinical rationing (A), payer coordination (B), and administrative process failure (D, E). A program with a high count in category D is not necessarily underfunded in the same way as a program with a high count in category A. The first is a notification-design problem; the second is a budget problem. The Unmet Need Report puts them in adjacent columns and lets the reader add them up.
Category D deserves particular attention. The 72-hour notification rule requires a patient or provider to notify the appropriate ordering official within 72 hours of the start of treatment for the condition, or after admission, with information sufficient to determine medical need and eligibility (IHS PRC Chapter Revisions, 2018). For an emergency — a car crash, a stroke, a preterm labor — the patient is in no position to manage a deadline. The rule converts an access event into a paperwork event, and the denial is recorded in the same table as a priority decision. Whether that is the right place for it is a design question the report does not answer.
The deferral tables are the real waiting list
The deferral tables are more revealing than the denial counts because they show what the system knows it owes. The FY2016 instructions divide deferrals into three tiers: preventive services (Table 3A), acute and chronic primary and secondary care (Table 3B), and acute and chronic tertiary care (Table 3C) (Manual Exhibit 2-3-O). Table 3A includes mammograms, diabetic podiatry, physical therapy, and glasses. Table 3B includes cardiac catheterization, oncology referrals, and orthopedic procedures. Table 3C includes coronary bypass, transplants, and joint replacements.
Now read the inclusion rules. To count as a deferral, the patient must have accessed the IHS health care system during the reporting period; the service must be deferrable; denials are excluded; the service cannot be accessible or available in the local IHS direct system; and the service must be within IHS medical priorities (Manual Exhibit 2-3-O). Each of those conditions is a filter. A patient who never reached the IHS system is not counted. A service judged outside the priority list is not counted. A denial is not counted. The reported unmet need is therefore a floor, not a ceiling. The form’s inclusion criteria are themselves a rationing mechanism, and they operate before the budget does.
This matters for how the number gets used. The FY2016 data call states that the information “will be used to determine unmet PRC financial needs and support program budget justifications to the Department of Health and Human Services, Office of Management and Budget, and Congress” (Manual Exhibit 2-3-O). The same document says the data call is required for all federal PRC programs, while tribal PRC programs are “strongly encouraged” to report. That asymmetry is not a footnote. Most PRC administration now sits with tribes, and the national shortfall estimate is built on a denominator that systematically undercounts them. The IHS manual’s own definition of unmet need describes the method: counts of deferral and denial cases are recorded by individual programs, collected by area offices, submitted to headquarters, and multiplied by an average cost per PRC claim to estimate resource need (IHS PRC Chapter Revisions, 2018). A voluntary reporting stream feeding a mandatory budget justification is a structural undercount, not a data gap to be lamented.
The same form architecture fails in the other direction
If the denial and deferral machinery is the rationing system, the HHS Office of Inspector General’s 2020 audit of PRC claims is the control-system mirror image. The OIG reviewed 802,470 claims paid between October 2013 and June 2016 for 120,818 beneficiaries, totaling $672.4 million, and sampled 100 claims against nine federal requirements (OIG, A-03-16-03002). Eighteen of the 100 were paid in accordance with federal requirements. Eighty-two were not. The OIG estimated that 658,025 of the 802,470 total claims were not paid in accordance with federal requirements.
The stated cause is the important part: IHS “did not have controls in place to prevent its Referred Care Information System (RCIS) from accepting claims missing information” (OIG, A-03-16-03002). The failures spanned beneficiary eligibility, medical necessity and priority, timeliness of notification, payor-of-last-resort status, timeliness of claim approval, and timeliness of payment. In other words, the same gates that produce denial letters on the front end were not being enforced on the payment side. The system paid claims it could not document as authorized, and it denied or deferred referrals it could not fund. Both are failures of the same form architecture, viewed from opposite ends.
This is not a reason to treat the denial counts as fabricated. It is a reason to treat them as administrative records produced by a system whose edit checks were, at least during the audit period, not reliably enforcing the rules they were supposed to encode. If RCIS could not distinguish a properly authorized referral from an unauthorized one on the payment side, the integrity of the denial and deferral counts on the unmet-need side deserves the same scrutiny. The OIG recommendations — an RCIS edit to enforce geographic eligibility documentation, staff education on documenting medical necessity and priority review, outreach on the 72-hour notification rule, and payment only after alternate-resource documentation is complete — were all closed as implemented by June 2022 (OIG, A-03-16-03002). The retrieved record does not describe the implemented controls, so the current state of the edit checks is an open question, not a settled one.
What the funding gap actually looks like
The scale of the shortfall is documented outside the PRC tables. A 2022 report prepared for the Indian Health Service states that IHS funding addresses only an estimated 48.6% of the health care needs of American Indians and Alaska Natives, and that the appropriation has historically been subject to year-by-year discretionary allocations (ITCMI, How Increased Funding Can Advance the Mission of the Indian Health Service). That figure is about the IHS budget overall, not PRC specifically, and it should not be quoted as a PRC denial rate. But it sets the frame: PRC is the pressure-release valve for a direct-care system that is funded at roughly half of estimated need. When specialty care is unavailable locally and the patient has no other coverage, PRC is the only route to a non-IHS provider — “depending on available program funding” (ITCMI). The phrase does a lot of work.
The redesign question
If the denial and deferral counts are the budget justification data, then the form design is the rationing policy. That has practical consequences for anyone who will have to rebuild this:
Separate process denials from rationing denials in the published tables. Categories D and E are not statements about clinical need. Reporting them alongside category A inflates the apparent rationing count and obscures the notification-design problem. A redesigned table would report them separately and state what fraction of category D cases involved emergency care, where the 72-hour rule is least defensible as a patient responsibility.
Make tribal reporting mandatory or model it. A national shortfall estimate that treats tribally operated programs as optional respondents cannot support a budget justification for a system where most PRC administration is tribal. The fix is not a better survey instrument; it is a reporting requirement with the same force as the federal one, or a modeled estimate that does not depend on voluntary submission.
Treat RCIS edit checks as a health-equity control. The OIG’s finding that the system accepted claims with missing information is usually read as a payment-integrity problem. It is also an access problem: a system that cannot document authorization cannot defend its own denial decisions either. The edit checks that enforce the gates on the payment side are the same checks that would make the denial counts auditable.
Stop calling the deferral count unmet need without qualification. It is the count of patients who reached the system, whose service was judged deferrable, and whose service fell within the priority list. That is a real number and a useful one. It is not the size of the gap. Naming it accurately is the first step toward measuring the gap that the form currently cannot see.
FAQ
Is PRC the same as Medicaid? No. PRC is an IHS payment program for care delivered outside IHS or tribal facilities. Medicaid is a separate payer, and PRC operates under a payor-of-last-resort rule that requires patients to use alternate resources such as Medicaid, Medicare, VA, or private insurance when those are accessible and available (IHS PRC Chapter Revisions, 2018). The interaction between the two is a coordination problem, not a substitution.
Does an IHS referral guarantee payment? No. The IHS states directly that an IHS referral does not imply the care will be paid (IHS PRC program page). Payment depends on the four gates and on available funds.
What is the difference between a denial and a deferral? A denial is a finding that the request failed an eligibility, notification, prior-authorization, or priority gate. A deferral is a service that meets the priority framework but is postponed because funds are not available. The Unmet Need Report instructions explicitly exclude denials from the deferral counts (Manual Exhibit 2-3-O).
Why does the 72-hour notification rule matter so much? Because it applies to emergency care, where the patient is least able to comply. A denial under category D is recorded as an unmet-need case even though the underlying failure is a notification-design problem, not a clinical priority decision. Whether that belongs in the same table as category A is a policy choice, and it is currently made by default.
Where can I find actual denial counts by area or facility? The retrieved sources for this article do not contain facility-level or area-level counts. The Unmet Need Report workbooks are the place to look, and the FY2016 data call describes the reporting structure but not the results (Manual Exhibit 2-3-O). Anyone citing a specific denial rate for a named service unit should be able to point to the workbook it came from.