HIPAA Transaction and Code Set Standard
Transaction and Code Set standards require providers and health plans to use standard content, formats and coding.
Providers who transmit information electronically must use standard medical codes, and eliminate the use of duplicative and local codes. Health plans, which use a wide variety of codes and formats to transact business with providers and clients, must be able to accept and respond to the standard electronic data interchange (EDI) transaction formats and related medical and non-medical code sets.
837 Health Care Claims
For professional, institutional, and dental providers, the 837 provides the capacity to submit electronic health care encounters and claims. Compliance with this electronic transaction includes the use of HIPAA defined, compliant code sets.
835 Health Care Claim Payment/Remit Advice
Utilized by a payer to send electronic remittance advice (ERA) or electronic explanation of payment (EOP) to a requesting provider. Also includes payment of health care claims. However, Cigna has elected to implement only the ERA portion of this transaction and will continue to utilize existing banking and related Electronic Fund Transfer processes for payment of health care claims. Providers must request an 835 through their Clearinghouse; it is not automatic.
270/271 Inquiry/Response for Eligibility
Allows determination of subscriber or dependent eligibility as well as the benefit information for the subscriber or dependent. The 270 is the inbound eligibility/benefit inquiry transaction from a provider to a health plan. The 271 is the eligibility/benefit response transaction of this set. This is an interactive transaction set and responses are "real time."
276/277 Inquiry/Response for Claim Status
Used by providers to request status on a submitted claim (276) and to receive a status response (277). The 276 is utilized by institutional, professional and dental providers, and supplemental health care claims processors as defined by the regulations. The 277 response transactions are utilized by payers and other entities that process claims. This is an interactive transaction set and responses are "real time."
278 Referral Certification, Authorization, Extensions and Appeals
Referral Certification: Used by providers to request certification for a patient to receive health care services. Also provides capacity to appeal a UM decision. Authorization: Provider receives permission from review entity/UM to refer the patient to a specialist, admit the patient to a facility, or administer medical services or treatment to the patient. This transaction also covers pre-certification prior to elective hospitalization or treatment, as required, for determination of medical necessity. This transaction allows the provider to request an extension to a previously approved authorization, pre-certification, or referral. The 278 is implemented as an interactive transaction.
131 International Classification of Diseases Clinical Mod (ICD-9-CM) Procedure
The International Classification of Diseases, 9th Revision, Clinical Modification, describes the classification of morbidity and mortality information for statistical purposes and for the indexing of hospital records by disease and operations.
132 National Uniform Billing Committee (NUBC) Codes
Revenue codes are a classification of hospital charges in a standard grouping that is controlled by the National Uniform Billing Committee. Place of service codes specify the type of location where a service is provided.
134 National Drug Code
The National Drug Code is a coding convention established by the Food and Drug Administration to identify the labeler, product number, and package sizes of FDA-approved prescription drugs. There are over 170,000 National Drug Codes on file.
135 American Dental Association Codes
The CDT contains the American Dental Association's codes for dental procedures and nomenclature and is the nationally accepted set of numeric codes and descriptive terms for reporting dental treatments.
139 Claim Adjustment Reason Code
Bulletins describe standard codes and messages that detail the reason why an adjustment was made to a health care claim payment by the payer.
229 Diagnosis Related Group Number (DRG)
A patient classification scheme that clusters patients into categories on the basis of patient's illness, diseases, and medical problems.
235 Claim Frequency Type Code
A variety of codes explaining the frequency of the bill submission.
240 National Drug Code by Format
Publication includes manufacturing and labeling information as well as drug packaging sizes.
245 National Association of Insurance Commissioners (NAIC) Code
Codes that uniquely identify each insurance company.
307 National Association of Boards of Pharmacy Number
A unique number assigned in the U.S. and its territories to individual clinic, hospital, chain, and independent pharmacy locations that conduct business at retail by billing third-party drug benefit payers. The National Council for Prescription Drug Programs (NCPDP) maintains this database under contract from the National Association of Boards of Pharmacy. The National Association of Boards of Pharmacy is a seven-digit numeric number with the following format SSNNNNC, where SS=NCPDP assigned state code number, NNNN=NCPDP assigned pharmacy location number, and C=check digit calculated by algorithm from previous six digits.
411 Remittance Remark Codes
These codes represent non-financial information critical to understanding the adjudication of a health insurance claim.
513 Home Infusion EDI Coalition (HIEC) Product/Service Code List
This list contains codes identifying home infusion therapy products/services.
530 National Council for Prescription Drug Programs Reject/Payment Codes
A listing of NCPDPs payment and reject reason codes, the explanation of the code, and the field number in error (if rejected).
537 Health Care Financing Administration National Provider Identifier
The Health Care Financing Administration is developing the National Provider Identifiers, which is proposed as the standard unique identifier for each health care provider under the Health Insurance Portability and Accountability Act of 1996.
540 Health Care Financing Administration National Plan ID
The Health Care Financing Administration is developing the Plan ID, which will be proposed as the standard unique identifier for each health plan under the Health Insurance Portability and Accountability Act of 1996.
More in Coverage and Claims
More on HIPAA Compliance
For more information on HIPAA, visit the
This information is not legal advice or a legal opinion on any specific facts or circumstances. This page is for general information purposes only and you are urged to consult a lawyer concerning your own situation and any specific legal questions you may have.
Health Care Finance Administration Common Procedural Coding System
Health Care Financing Administration Center for Health Plans and Providers
7500 Security Boulevard
Baltimore, MD 21244-1850
I want to...
Secure Member Sites
Cigna Company Information
Individual and family medical and dental insurance plans are insured by Cigna Health and Life Insurance Company (CHLIC), Cigna HealthCare of Arizona, Inc., Cigna HealthCare of Illinois, Inc., Cigna HealthCare of Georgia, Inc., Cigna HealthCare of North Carolina, Inc., Cigna HealthCare of South Carolina, Inc., and Cigna HealthCare of Texas, Inc. Group health insurance and health benefit plans are insured or administered by CHLIC, Connecticut General Life Insurance Company (CGLIC), or their affiliates (see
All insurance policies and group benefit plans contain exclusions and limitations. For availability, costs and complete details of coverage, contact a licensed agent or Cigna sales representative. This website is not intended for residents of New Mexico.