Lionel Williamson, FNP
- Part D claims, 2024
- 1,357
- Affiliated sites
- 1
- Medical groups
- 2
- State license
- 1
- Year NPI issued
- 2010
- Practice address
- 5255 Hemlock Street, Sacramento, CA 95841
- Practice phone
- Call (916) 331-4590
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Sacramento Post-Acute
Skilled Nursing Facility · Sacramento, California
Find Lionel Williamson's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Lionel Williamson is a family nurse practitioner in Sacramento, California
Lionel Williamson practices at Sacramento Post-Acute in Sacramento, California.
Lionel Williamson's NPI, 1881996445, was assigned on December 2, 2010. Lionel Williamson holds California license 20422.
- NPI
- 1881996445NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2860627411
- NPI enumeration date
- December 2, 2010
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (916) 331-4590
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 42
- Medical school graduation
- 2010
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Lionel Williamson practices at Sacramento Post-Acute in Sacramento, California
Lionel Williamson's primary practice is Sacramento Post-Acute, at 5255 Hemlock Street, Sacramento, CA 95841 in Sacramento County. The practice phone is (916) 331-4590.
- Sacramento Post-Acute5255 Hemlock Street, Sacramento, CA 95841 · Sacramento CountyPhone(916) 331-4590
Source: Dmand AI Affiliation Data
Lionel Williamson is affiliated with 1 site of care and 2 medical groups
Lionel Williamson's primary practice is Sacramento Post-Acute in Sacramento, California. The medical group on file is Community Health Centers of America. Dmand AI also links Lionel Williamson to 1 more medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Lionel Williamson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Lionel Williamson practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Sacramento Post-Acute | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Lionel Williamson is one of 13,532 family nurse practitioners in California
Family is Lionel Williamson's primary specialty in the NPI Registry, under taxonomy code 363LF0000X. Lionel Williamson is licensed in California.
Specialties and state licenses
- Family nurse practitioner, CaliforniaPrimary
Clinical focus
Dmand AI lists acute skin infection, anxiety, arthritis, bipolar disorder, bladder disease, chronic diabetes, chronic obstructive pulmonary disease (COPD) and chronic respiratory failure among the conditions Lionel Williamson treats.
Family nurse practitioners near Lionel Williamson
Counts of family nurse practitioners with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Lionel Williamson's patients have a median age of 75
Across all payers, Dmand AI patient panel data puts Lionel Williamson's median patient age at 75, with 48% women.
Lionel Williamson's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women48%
- Men51%
Source: Dmand AI Patient Panel Data
Lionel Williamson wrote 1,357 Medicare Part D claims in 2024
In 2024, Lionel Williamson wrote 1,357 Medicare Part D claims for 163 patients. 78% of them were for generic drugs. CMS names the drug for 880 of them, across 32 drugs with 11 or more claims each, at $31,070 in total drug cost.
Lionel Williamson's Part D claims by kind of drug, 2024
- Generic1,061 claims78%
- Brand-name283 claims21%
- Other13 claims1%
Lionel Williamson's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Lionel Williamson's Part D claims, 2024
- Opioids13%179 of 1,357 claims
- Antibiotics4%58 of 1,357 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Lionel Williamson takes part in Medicare
Lionel Williamson accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Sources for Lionel Williamson's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Lionel Williamson
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Lionel Williamson's NPI number?
Lionel Williamson's NPI number is 1881996445. It was assigned on December 2, 2010, and it is active in the NPI Registry.
What does Lionel Williamson specialize in?
Lionel Williamson is a family nurse practitioner in Sacramento, California. The primary specialty in the NPI Registry is Family Nurse Practitioner (taxonomy code 363LF0000X).
Where does Lionel Williamson practice?
Lionel Williamson practices at 5255 Hemlock Street, Sacramento, CA 95841. Lionel Williamson's primary practice is Sacramento Post-Acute in Sacramento, California. Dmand AI also links Lionel Williamson to 1 medical group.
What is Lionel Williamson's office phone number?
The practice phone on file for Lionel Williamson is (916) 331-4590.
What is Lionel Williamson's medical license number?
Lionel Williamson holds California license 20422.
What medical group is Lionel Williamson part of?
Lionel Williamson is linked to Community Health Centers of America. Dmand AI links Lionel Williamson to 1 more medical group.
Does Lionel Williamson accept Medicare?
Yes. CMS lists Lionel Williamson as accepting Medicare assignment.
What drugs does Lionel Williamson prescribe most?
In 2024 Medicare Part D data, Lionel Williamson's most prescribed drugs by claims were Dextrose In Water, Hydrocodone-Acetaminophen and Furosemide.
How long has Lionel Williamson been practicing?
Lionel Williamson graduated from medical school in 2010, 16 years ago.
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