Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Aaron M. Witz, MD
Pediatrics Physician in Seattle, WA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1417028416
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Registry record
Entity type Individual (Type 1)
Name Aaron M. Witz
Credential MD
Sex Male
Practice address 747 Broadway, Seattle, WA, 98122
Phone (206) 215-2700
Fax (206) 215-3101
Enumeration date Nov 13, 2006
Last updated in NPPES Feb 18, 2009
Taxonomy & licenses
208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License MD00039128 (WA) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 8264079 | Medicaid | WA | - |
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
What specialty is Aaron Witz?
Aaron Witz is registered in NPPES with the primary taxonomy of Pediatrics Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-02-18.