Note: Any codes not listed within this table are not currently in use by CMS. This includes any code ranges that are considered Reserved for National Assignment.
Search for Occurrence Codes| Code | Description | Additional Information |
|---|---|---|
| 01 | Accident/Medical Coverage | Code indicating accident-related injury for which there is medical payment coverage. Provide the date of accident/injury. |
| 02 | No Fault Insurance Involved - Including Auto Accident/Other | Date of an accident, including auto or other, where the State has applicable no-fault or liability laws (i.e., legal basis for settlement without admission or proof of guilt). |
| 03 | Accident/Tort Liability | Date of an accident resulting from a third party's action that may involve a civil court action in an attempt to require payment by the third party, other than no-fault liability. |
| 04 | Accident/ Employment Related | |
| 05 | Accident/No Medical or Liability Coverage | Code indicating accident related injury for which there is no medical payment or third-party liability coverage. Provide date of accident or injury. |
| 06 | Crime Victim | |
| 09 | Start of Infertility Treatment Cycle | |
| 10 | Last Menstrual Period | |
| 11 | Onset of Symptoms/Illness | Outpatient claims only. If beneficiary receiving a combination of PT/OT/SLP only one 11 occurrence code is required. |
| 12 | Date of Onset for A Chronically Dependent Individual | |
| 16 | Date of Last Therapy | Code indicates the last day of therapy services (e.g., physical, occupational or speech therapy). |
| 17 | Date Outpatient Occupational Therapy Plan Established or Last Reviewed | |
| 18 | Date of Retirement - Patient/Beneficiary | |
| 19 | Date of Retirement - Spouse | |
| 20 | Date Guarantee of Payment Began | Part A hospital claims only. Date hospital begins claiming payment. |
| 21 | Date Ur Notice Received | |
| 22 | Date Active Care Ended | Date a covered level of care ended in SNF or general hospital or date active care ended in psych or tuberculosis hospital or date patient was released on trial basis from residential facility. *Code not required if code "21" is used. |
| 23 | Payer Code | Date of Cancellation of Hospice Election Period. For FI Use Only. Providers Do Not Report. *Not required if code 21 is used. |
| 24 | Date Insurance Denied | |
| 25 | Date Benefits Terminated by Primary Payer | |
| 26 | Date SNF Bed Became Available | Date SNF bed available to the Inpatient who requires only SNF level care. |
| 27 | Date of Hospice Certification or Recertification | |
| 28 | Date Comprehensive Outpatient Rehabilitation Plan Established or Last Reviewed | |
| 29 | Date Outpatient Physical Therapy Plan Established or Last Reviewed | |
| 30 | Date Outpatient Speech Pathology Plan Established or Last Reviewed | |
| 31 | Date Beneficiary Notified of Intent to Bill (Accommodations) | Beneficiary does not (or no longer) require covered level of inpatient care. |
| 32 | Date Beneficiary Notified of Intent to Bill (Procedures or Treatments) | Is not reasonable or necessary under Medicare. |
| 33 | First Day of The Coordination Period for ESRD Beneficiaries Covered By EGHP | Required only for ESRD beneficiaries. |
| 34 | Date of Election of Extended Care Facilities | Used by Religious Non-medical Health Care Institutions only. |
| 35 | Date Treatment Started for Physical Therapy | |
| 36 | Date of Inpatient Hospital Discharge for Covered Transplant Patient | NOTE: When patient received a covered and non-covered transplant, the covered transplant predominates. |
| 37 | Date of Inpatient Hospital Discharge for Non-Covered Transplant Patient | |
| 38 | Date Treatment Started for Home IV Therapy | |
| 39 | Date Discharged on a Continuous Course of IV Therapy | |
| 40 | Scheduled Date of Admission | This code may only be used on an outpatient claim. |
| 41 | Date of First Test for Pre-Admission Testing | This code may be used only if date of admission was scheduled prior to administration of test(s). |
| 42 | Date of Discharge | Hospice discharge due to patient revocation. |
| 43 | Scheduled Date of Canceled Surgery | |
| 44 | Date Treatment Started for Occupational Therapy | |
| 45 | Date Treatment Started for Speech Therapy | |
| 46 | Date Treatment Started for Cardiac Rehabilitation | Beneficiary must have regular coinsurance and/or lifetime reserve days available beginning on this date to allow coverage of additional daily charges to receive cost outlier payments. |
| 47 | Date Cost Outlier Status Begins | |
| 48 | Payer Code | |
| 49 | Payer Code | |
| 50 | Assessment Date (Effective 1/1/11) | Assessment Date for IRF, SNF and SB PPS. Note: Not required for SNF HIPPS code AAAxx |
| 51 | Date of Last Kt/V Reading (Effective 7/1/10) | |
| 52 | Medical Certification/Recertification Date (Effective 1/1/11) | |
| 54 | Physician Follow-Up Date (Effective 1/1/11) | |
| 55 | Date of Death (Effective 10/1/12) | |
| 56 | Original Hospice Election or Revocation Date (Effective 1/1/18) | |
| 61 | Hospital Discharge Date (HHA Only) (Effective 1/1/20) | |
| 62 | Other Institutional Discharge Date (HHA Only) (Effective 1/1/20) | |
| A1 | Birthdate - Insured A | Birth date of insured in whose name the insurance is carried. |
| A2 | Effective Date - Insured A Policy | First date insurance is effective. |
| A3 | Benefits Exhausted - Payer A | Last date benefits are available and no payment can be made by Payer A. |
| A4 | Split Bill Date | Date patient became Medicaid eligible due to medically needy spend down. |
| AA-AZ AA AB AC AD AE AF AG AH AI AJ AK AL AM AN AO AP AQ AR AS AT AU AV AW AX AY AZ | Payer Code | |
| B1 | Birthdate - Insured B | |
| B2 | Effective Date - Insured B Policy | |
| B3 | Benefits Exhausted - Payer B | |
| C1 | Birthdate - Insured C | |
| C2 | Effective Date - Insured C Policy | |
| C3 | Benefits Exhausted - Payer C | |
| DR | Reserved for Disaster Related Occurrence Code |
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