Taxonomy Code
A 10-character code that classifies provider specialties for HIPAA transactions.
1 min read · Last reviewed May 23, 2026
At a glance
- Category
- Enrollment
- Primary sources
- 1
- Workspace handoff
- compliance binder →
Where this comes up
Credentialing and revenue-cycle staff handle this — CAQH ProView upkeep, payer-roster validation, NPI maintenance, PECOS revalidation cycles, and the gap between application and effective date that strands new providers. Lapses here block payment until backdated re-enrollment closes the gap.
Full definition
What it is in practice
The Healthcare Provider Taxonomy Code Set is maintained by the NUCC and used on the 837 claim and NPI registration. Choosing the right code at NPI enumeration prevents downstream payer-enrollment delays.
How it shows up in your practice
Keep the taxonomy aligned with the actual specialty and subspecialty. Mismatches between the NPI taxonomy and credentialing data cause claim denials.
Sources
- CMS — NPI Standardhttps://www.cms.gov/regulations-and-guidance/administrative-simplification/nationalprovidentstand
Confirm taxonomy in the Compliance Binder
Open compliance binder →Related terms
D3rx is a healthcare-billing and compliance research aid maintained by D3rx Inc. Articles are drafted by an LLM (Anthropic Claude) against primary HHS, OCR, CMS, eCFR, NIST, and state-regulator publications, and reviewed for restraint and source fidelity by the D3rx team.
Reviewer status: a named credentialed reviewer (CHC, CHPC, or healthcare attorney) is being engaged. Until that engagement is finalized, this page does not claim credentialed review.
Related across the archive
- GlossaryNPI (National Provider Identifier)The 10-digit HIPAA standard identifier for health care providers.
- GlossaryCredentialingThe process by which a payer verifies a provider's qualifications and grants participation in the network.
- RegulationCMS-855A: Medicare Enrollment for Institutional ProvidersMedicare enrollment application for institutional providers including hospitals, CAHs, hospices, home health agencies, federally qualified health centers, rural health clinics, and similar entities.
- RegulationCMS-855B: Medicare Enrollment Application for Clinics and Group PracticesThe Medicare enrollment application for clinics, group practices, and certain other suppliers — the primary enrollment vehicle for medical practices that bill Part B.
- RegulationCMS-855I: Medicare Enrollment Application for Individual Physicians and Non-Physician PractitionersIndividual Medicare enrollment vehicle for physicians, NPPs, and certain other individual suppliers; required for any clinician billing Medicare under their own name.
- RegulationCMS-855O: Medicare Enrollment for Eligible Ordering and Certifying Physicians and Other Eligible ProfessionalsAbbreviated Medicare enrollment for clinicians who order or certify items and services for Medicare beneficiaries but do not personally bill Medicare.
- RegulationCMS-855R: Reassignment of Medicare BenefitsAuthorization form for an individual physician/NPP to reassign their right to collect Medicare payment to a group practice or other eligible entity.
- RegulationCMS-855S: DMEPOS Supplier EnrollmentMedicare enrollment application for durable medical equipment, prosthetics, orthotics, and supplies suppliers, with heightened standards including accreditation and surety bond.
This glossary entry is a research aid for billing and compliance staff. It does not provide legal, medical, or financial advice and does not replace counsel. References cited link to primary sources at HHS, OCR, CMS, eCFR, NIST, and the relevant payer or industry body.