Find your behavioral health NPI taxonomy code, with Medicare and Medicaid validity
The taxonomy code tied to your NPI tells payers who you are and what you’re licensed to do. Using the wrong one can stall credentialing applications, trigger claim rejections, and delay reimbursement by weeks. Search 23 behavioral health taxonomy codes and see which payers accept each one.
Taxonomy codes are 10-character alphanumeric codes maintained by the National Uniform Claim Committee (NUCC) that classify every type of healthcare provider in the United States. Every licensed clinician and healthcare organization is assigned at least one taxonomy code, which describes their provider type, specialty classification, and, in some cases, their specific area of practice. The NUCC Health Care Provider Taxonomy system is the national standard used by payers, clearinghouses, and federal programs to identify who is submitting a claim or credentialing application.
Your taxonomy code is registered in NPPES, the National Plan and Provider Enumeration System, and linked directly to your NPI. When you apply for a new NPI or update an existing one, you select the taxonomy codes that reflect your license and role. Payers query NPPES when processing credentialing applications and claims, so the taxonomy code on file in NPPES must match what you submit. A mismatch can cause a credentialing application to be rejected, a PECOS Medicare enrollment to stall, or a claim to be denied as a provider eligibility error.
Behavioral health providers encounter taxonomy code issues more often than most specialties, largely because the field encompasses a wide range of license types with similar but distinct codes. The most common behavioral health taxonomy codes include 101Y00000X for licensed professional counselors (LPCs), 1041C0700X for clinical social workers (LCSWs), 103T00000X for clinical psychologists, and 261QM0801X for mental health clinics and outpatient centers. Each code has different Medicare and Medicaid coverage rules, and some are accepted by commercial payers but not by federal programs.
Medicare and Medicaid have different requirements for taxonomy codes because they operate under different statutory frameworks. Medicare defines independent billing rights at the federal level and recognizes only certain taxonomy codes for direct billing under Part B. Medicaid rules vary by state and are often more permissive, accepting a broader range of provider types. This means the same taxonomy code might qualify a provider for Medicare billing in some states but not others, and might be accepted by Medicaid in one state while requiring a different code in the next.
If your taxonomy code needs to be corrected or updated, you can do this directly in NPPES at nppes.cms.hhs.gov. Changes to NPPES typically propagate to payers within a few days to a few weeks. If you’re in the middle of a credentialing application when you discover a taxonomy mismatch, contact the payer’s credentialing department directly to explain the update and ask them to hold the application while the change processes.
This tool is most useful for clinicians setting up their practice and selecting taxonomy codes for the first time, credentialing coordinators verifying codes before submitting payer applications, and billing teams troubleshooting claim denials tied to provider eligibility. Select your license type or provider category to see the corresponding taxonomy codes, their NUCC descriptions, and their acceptance status with Medicare and Medicaid.
Frequently asked questions
A taxonomy code is a 10-character alphanumeric code that identifies your provider type, classification, and specialty in the NPI system. It tells payers who you are and what you’re licensed to do. Without the correct taxonomy code on your NPI record and claims, payers cannot verify your credentials, which can cause credentialing applications to be rejected, PECOS enrollment to stall, and claims to be denied. Every clinician billing insurance needs at least one taxonomy code assigned in NPPES.
Go to the NPPES NPI Registry at npiregistry.cms.hhs.gov and search by your NPI number or name. Your provider record will display all taxonomy codes currently on file. You can also log in to the NPPES web application at nppes.cms.hhs.gov to view or update your taxonomy codes directly. If you’re a credentialing staff member looking up codes for multiple providers, the NPI Registry bulk search or downloadable data file can save significant time.
Yes. NPPES allows you to list multiple taxonomy codes on a single NPI, and one must be designated as the primary taxonomy. Payers use the primary taxonomy for credentialing and eligibility checks, so it should reflect your principal license and practice type. Secondary taxonomy codes can reflect additional specialties or roles. When billing, some payers require the taxonomy code submitted on the claim to match the primary code on file in NPPES, so consistency matters.
Licensed Clinical Social Workers billing Medicare should use taxonomy code 1041C0700X (Clinical Social Worker). This is the code Medicare recognizes for independent LCSW billing and is required for PECOS enrollment as a clinical social worker. Using a related but incorrect code, such as the general social worker code 104100000X, can result in PECOS enrollment rejections and Medicare claim denials. If you hold multiple licenses, confirm your primary taxonomy in NPPES reflects the credential under which you’re billing Medicare.
The most commonly used taxonomy code for mental health outpatient clinics is 261QM0801X (Mental Health Clinic/Center). Group practices billing under a group NPI (Type 2 NPI) should use an organizational taxonomy code rather than an individual provider taxonomy. The correct code depends on how the organization is licensed at the state level and how it is structured for billing purposes. Credentialing coordinators should verify with each payer which organizational taxonomy codes they recognize.
Yes, and it’s one of the more frustrating sources of denials because it’s not always obvious from the denial reason code. When the taxonomy code on a claim doesn’t match what’s on file in NPPES, or doesn’t match the credentialing record the payer has on file, the payer may deny the claim as a provider eligibility issue or a credentialing mismatch. These denials often require manual follow-up with both the payer’s credentialing department and NPPES, which can take weeks to resolve. Verifying your taxonomy codes before credentialing applications and before billing a new payer is the simplest way to avoid this.
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