Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Joseph L Werther, M.D
Pediatrics Physician in Mesa, AZ · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1629096458
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Registry record
Entity type Individual (Type 1)
Name Joseph L Werther
Credential M.D
Sex Male
Practice address 1220 S Higley Rd Ste 101, Mesa, AZ, 85206
Phone (480) 827-5045
Fax (480) 827-5181
Enumeration date Jul 18, 2006
Last updated in NPPES Oct 21, 2020
Taxonomy & licenses
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 |
|---|---|---|---|
| 4235002 | Other | AZ | AETNA |
| 956196 | Medicaid | AZ | - |
| 2Z5140 | Other | AZ | HEALTH NET |
| 956196002 | Other | AZ | MERCY CARE |
| AZ0153391 | Other | AZ | BLUE CROSS BLUE SHIELD |
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 Joseph Werther?
Joseph Werther 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
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-10-21.