James Alton Williams, MD
James Alton Williams is a Pediatric Hematology & Oncology Physician provider (Pediatrics) practicing in Mesa, AZ, registered in the NPPES registry with NPI 1316930837 since 2005. The credential MD stands for Doctor of Medicine.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1316930837 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | James Alton Williams |
| Credential | MD |
| Sex | Male |
| Practice address | 5131 E SOUTHERN AVE, Mesa, AZ, 85206 |
| Phone | 6025460920 |
| Fax | 6025460276 |
| Enumeration date | 2005-08-30 |
| Last updated in NPPES | 2017-09-13 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 2080P0207X | Pediatric Hematology & Oncology Physician | Primary | 333911 | AZ |
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 |
|---|---|---|---|
| 905036 | Medicaid | AZ | — |
Copy-ready billing details
Provider: James Williams, MD NPI: 1316930837 Taxonomy: 2080P0207X (Pediatric Hematology & Oncology Physician) Address: 5131 E SOUTHERN AVE, Mesa, AZ, 85206
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1174522890 | Karl Baumgartner | Individual | Pediatrics Physician | Mesa, AZ |
| 1972586006 | Joseph Gassen | Individual | Pediatrics Physician | Mesa, AZ |
| 1740263474 | Sanjay Shah | Individual | Pediatric Hematology & Oncology Physician | Mesa, AZ |
| 1043363831 | Adrianna Salazar | Individual | Speech-Language Pathologist | Mesa, AZ |
| 1881722692 | Ginger Carlson | Individual | Clinical Psychologist | Mesa, AZ |
| 1487814240 | Phoenix Children'S Medical Group | Organization | Multi-Specialty Clinic/Center | Mesa, AZ |
| 1275886434 | Phoenix Children'S Hospital, Inc. | Organization | Children's Hospital | Mesa, AZ |
| 1215271911 | Phoenix Children'S Hospital, Inc. | Organization | Urgent Care Clinic/Center | Mesa, AZ |
Verify this record
Cross-check NPI 1316930837 against the authoritative CMS record: view James Alton Williams on the official NPPES registry .
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. Read the full guide or validate an NPI number.
Frequently asked questions
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2017-09-13.