Lionel Williamson, FNP
NPI 1881996445 · Family Nurse Practitioner · Sacramento, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Lionel Williamson, FNP is a Family Nurse Practitioner provider in Sacramento, CA (NPI 1881996445).
Provider details
- NPI number
- 1881996445
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP
- Sex
- Male
- Sole proprietor
- No
- License
- 20422 (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 tenure38% of score
15 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 32 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Dextrose 5 % in Waterbrand: Dextrose in Water | 84 | — |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 66 | 17 |
| Furosemide | 63 | 26 |
| Amlodipine Besylate | 48 | 22 |
| Oxycodone Hcl | 39 | — |
| 0.9 % Sodium Chloridebrand: Sodium Chloride | 36 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-12-02
- Last updated
- 2018-09-04
Frequently asked questions
- What is Lionel Williamson's NPI number?
- Lionel Williamson's National Provider Identifier (NPI) is 1881996445, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Lionel Williamson's specialty?
- Lionel Williamson is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Lionel Williamson located?
- Lionel Williamson's practice location on file with NPPES is 8325 Elk Grove Florin Rd Ste 800, Sacramento, CA 95829-9524.
- What is Lionel Williamson's phone number?
- The practice phone number listed in the NPPES registry for Lionel Williamson is (916) 226-6190.
- Does Lionel Williamson accept Medicare?
- Lionel Williamson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Lionel Williamson's NPI active?
- Yes — Lionel Williamson's NPI (1881996445) is active in the NPPES registry as of the last update on 2018-09-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.