William G Stone, MD
William G Stone is a Surgery Physician provider (Surgery) practicing in Sonora, CA, registered in the NPPES registry with NPI 1255505764 since 2008. The credential MD stands for Doctor of Medicine.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1255505764 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | William G Stone |
| Credential | MD |
| Sex | Male |
| Practice address | 900 GREENLEY RD, Sonora, CA, 95370 |
| Phone | 6055933688 |
| Enumeration date | 2008-04-15 |
| Last updated in NPPES | 2022-04-30 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 208600000X | Surgery Physician | Secondary | 8495 | SD |
| 208600000X | Surgery Physician | Primary | C167208 | CA |
MD — Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential
Copy-ready billing details
Provider: William Stone, MD NPI: 1255505764 Taxonomy: 208600000X (Surgery Physician) Address: 900 GREENLEY RD, Sonora, CA, 95370
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1336131523 | Christi Petersen | Individual | Nurse Practitioner | Sonora, CA |
| 1003807066 | Sonora Community Hospital | Organization | Cardiovascular Disease Physician | Sonora, CA |
| 1437135670 | James Mosson | Individual | Internal Medicine Physician | Sonora, CA |
| 1013988955 | Edman Fuentes | Individual | Surgical Physician Assistant | Sonora, CA |
| 1174583918 | Joanne Rios | Individual | Clinical Nurse Specialist | Sonora, CA |
| 1316993405 | Oncology Group Inc. | Organization | Radiation Oncology Physician | Sonora, CA |
| 1144268392 | James Comazzi | Individual | Specialist | Sonora, CA |
| 1215976576 | Shalom Margolis | Individual | Specialist | Sonora, CA |
Verify this record
Cross-check NPI 1255505764 against the authoritative CMS record: view William G Stone 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 2022-04-30.