Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Ms. Sonya B. Williams, C.R.N.P.
Family Nurse Practitioner in Arnold, MD · enumerated 2005 · practices at Maryland Primary Care Physicians, LLC.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1912999517
See something wrong? Report a correction
Registry record
Taxonomy & licenses
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 6279843 | Other | MD | AETNA HMO |
| 640732-02 | Other | MD | CAREFIRST MD RENDERING |
| 7202558 | Other | MD | AETNA PPO |
| 7605-0073 | Other | MD | CAREFIRST BLUECHOICE |
| P00256986 | Other | MD | RAILROAD MEDICARE |
| 111137 | Other | MD | JHHC PROVIDER NUMBER |
| 407664800 | Medicaid | MD | - |
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
Is NPI 1912999517 active?
How do I verify Sonya Williams's NPI record?
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-01-24.