Tanisha Williams, PA
NPI 1013951417 · Physician Assistant · San Bernardino, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tanisha Williams, PA is a Physician Assistant provider in San Bernardino, CA (NPI 1013951417).
Provider details
- NPI number
- 1013951417
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA
- Sex
- Female
- Sole proprietor
- No
- License
- PA15707 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
62 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 32 | $103 |
| Emergency Department Visit With High Level of Medical Decision Making99285 | 30 | $150 |
Typical Medicare-allowed amounts for these services range $103–$150 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 83 | 81 |
| Ibuprofen | 63 | 61 |
| Prednisone | 34 | 32 |
| Cephalexin | 30 | 30 |
| Ondansetronbrand: Ondansetron Odt | 29 | 29 |
| Ciprofloxacin Hcl | 28 | 28 |
| Tramadol Hcl | 25 | 25 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-15
- Last updated
- 2011-09-15
Frequently asked questions
- What is Tanisha Williams's NPI number?
- Tanisha Williams's National Provider Identifier (NPI) is 1013951417, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tanisha Williams's specialty?
- Tanisha Williams is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Tanisha Williams located?
- Tanisha Williams's practice location on file with NPPES is 1805 Medical Center Dr, San Bernardino, CA 92411-1217.
- What is Tanisha Williams's phone number?
- The practice phone number listed in the NPPES registry for Tanisha Williams is (909) 887-6333.
- Does Tanisha Williams accept Medicare?
- Tanisha Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tanisha Williams's NPI active?
- Yes — Tanisha Williams's NPI (1013951417) is active in the NPPES registry as of the last update on 2011-09-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.