John B. Williams, MD
John B. Williams is a Anatomic Pathology Physician provider (Pathology) practicing in Sacramento, CA, registered in the NPPES registry with NPI 1407934151 since 2006. The credential MD stands for Doctor of Medicine.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1407934151 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | John B. Williams |
| Credential | MD |
| Sex | Male |
| Practice address | 2025 MORSE AVE, Sacramento, CA, 95825 |
| Phone | 9169735000 |
| Enumeration date | 2006-11-01 |
| Last updated in NPPES | 2007-07-08 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 207ZP0101X | Anatomic Pathology Physician | Primary | G24236 | CA |
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 |
|---|---|---|---|
| 00G242360 | Medicaid | CA | — |
Copy-ready billing details
Provider: John Williams, MD NPI: 1407934151 Taxonomy: 207ZP0101X (Anatomic Pathology Physician) Address: 2025 MORSE AVE, Sacramento, CA, 95825
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1225033087 | Enrico Lallana | Individual | Neurology Physician | Sacramento, CA |
| 1649260944 | Jennifer Owings | Individual | Surgical Physician Assistant | Sacramento, CA |
| 1386635639 | Mark Hofer | Individual | Orthopaedic Surgery Physician | Sacramento, CA |
| 1225019052 | Elman Trias | Individual | Pediatric Pulmonology Physician | Sacramento, CA |
| 1447231931 | Melinda Mortenson | Individual | Surgical Oncology Physician | Sacramento, CA |
| 1851374763 | Cynthia Chui | Individual | Anesthesiology Physician | Sacramento, CA |
| 1376529263 | Geumjoo Hwang | Individual | Radiography Radiologic Technologist | Sacramento, CA |
| 1457338816 | Tom Nguyen | Individual | Diagnostic Radiology Physician | Sacramento, CA |
Verify this record
Cross-check NPI 1407934151 against the authoritative CMS record: view John B. 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 2007-07-08.