EDI 837I: Institutional Health Care Claim
The EDI 837I is the X12 Health Care Claim transaction for institutional providers — hospitals, skilled nursing facilities, home health, and other facility billers. It is the electronic equivalent of the UB-04 (CMS-1450) paper form, carrying revenue codes, type of bill, and facility data. The "I" denotes the institutional variant of the 837.
- Transaction
- 837I — Institutional Health Care Claim
- Direction
- Provider to payer (outbound)
- Pairs with
- 835 remittance; TA1/999/277CA acknowledgments
What is the EDI 837I?
The 837I is the facility claim. Hospitals, skilled nursing facilities, home health, hospice, and other institutional providers submit the 837I — the electronic UB-04 — instead of the professional claim. It carries the same 837 backbone as the 837P but adds the fields facility billing requires and physician billing does not.
Like the professional claim, it flows to the payer, generates acknowledgments, and is answered by an 835 remittance.
What institutional data does it carry?
- Type of bill (TOB) — facility type, classification, and claim frequency.
- Revenue codes — categorize each service line (room and board, pharmacy, OR, ED).
- Occurrence, value, and condition codes — dates, dollar amounts, and circumstances affecting adjudication.
- Statement-covered period — the from/through dates for the billing episode.
- Attending/operating providers — facility-context provider identifiers.
How does it differ from the 837P?
| 837I (institutional) | 837P (professional) | |
|---|---|---|
| Paper equivalent | UB-04 / CMS-1450 | CMS-1500 |
| Filed by | Hospitals, SNFs, facilities | Physicians, individual providers |
| Key fields | Revenue codes, TOB, value/occurrence codes | Rendering NPI, place of service |
What does an 837I look like in practice?
Take a one-night hospital observation stay. The 837I opens with a type of bill such as 0131 (hospital outpatient, admit-through-discharge claim), a statement-covered period of the from/through dates, and then a stack of revenue-code lines: 0762 for the observation room, 0250 for pharmacy, 0300 for laboratory, each paired with charges and, where required, a HCPCS code. Occurrence and value codes document the admission circumstances. The attending provider's NPI anchors the clinical responsibility. All of it resolves on the 835 the payer returns.
The institutional claim is unforgiving about internal consistency: the type of bill, the revenue codes, and the value/occurrence codes all have to tell one coherent story about the episode. A revenue line that implies inpatient pharmacy on an outpatient TOB, or a value code amount that contradicts the covered days, gets the claim kicked back before adjudication. Facilities that pre-price expected reimbursement against the applicable fee schedule catch underpayments in the remittance instead of writing them off.
What are common 837I issues?
Frequently asked questions
The 837I is the electronic institutional claim — the X12 format that replaced the paper UB-04 (CMS-1450) for hospitals, SNFs, home health agencies, hospice, and other facilities. It carries facility-level data the professional claim does not: revenue codes, type of bill, occurrence and value codes, condition codes, and the statement-covered period.
Type of bill (TOB) is a code that tells the payer what kind of facility claim it is — the facility type, the bill classification, and the frequency (first claim, continuing, replacement, void). For example, a hospital inpatient admission versus outpatient versus a replacement claim each carry a different TOB. Getting it wrong causes rejections and mis-adjudication.
Revenue codes are four-digit codes that categorize where or what type of service was provided within the facility — room and board, pharmacy, laboratory, operating room, emergency department, and so on. Each service line on an 837I pairs a revenue code with (often) a CPT/HCPCS code and charges. Payers use them for both pricing and bundling logic.
Sources & further reading
Reviewed by the ImmediCare Solutions RCM team
Certified billers and coders handling claims across 50+ specialties nationwide. This entry is reviewed against current payer policy and CMS rules. Last review: Jul 5, 2026.
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