Charlaine Ida Williamson, NP
Family Nurse Practitioner · Rancho Cucamonga, CA
Charlaine Ida Williamson, NP is a family nurse practitioner with a practice address in Rancho Cucamonga, California, and NPI 1932408960, issued on Mar 16, 2011. Check the license (California 19923, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Charlaine Ida Williamson
- Credential
- NP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- 19923 CA
Self-reported in NPPES; status is on the state search - Practice location
- 9170 Haven Ave Ste 120, Rancho Cucamonga, CA 91730
- Phone
- (909) 476-8700
- Enumerated
- Mar 16, 2011
- Record last updated
- Apr 13, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (909) 987-1400
- Medicare enrollment
- Enrolled (PECOS I20120417000482); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 16,966 in California → Look up another NPI →
Also registered at 9170 Haven Ave Ste 120
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nancy Meng, NP-CFamily Nurse Practitioner1760134852
- Kavoos Nazeri, M.D.Rheumatology Physician1477731644
- Brianda UlloaPhysician Assistant1770188468
Verify Charlaine Ida Williamson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 19923Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
100% more Medicare Part D claims than the average family nurse practitioner in 2024
2,608 Medicare Part D claims for 497 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. Brand-name drugs were 52% of claims.
Most prescribed
- Ozempic259 claims
- Levothyroxine Sodium228 claims
- Lantus Solostar142 claims
- Mounjaro114 claims
- Jardiance110 claims
- Nano 2nd Gen Pen Needle104 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $2,660.40
102 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 99,489 providers of this specialty with any payment received $650.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Providence Medical FoundationFullerton, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Charlaine Ida Williamson among 16,966 family nurse practitioner records in California
Charlaine Ida Williamson, NP is one of 16,966 family nurse practitioner records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 19% of them.
- NPI issued2011 · 19% of these records are older, 79% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 40% of these records are
- Graduated2010 · median 2019 among the 6,793 with a school on file
- Record last updated2021 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
81 family nurse practitioner records list a practice address in Rancho Cucamonga
They are 81 of the 4,579 NPPES records with a practice address in Rancho Cucamonga, and 16,966 family nurse practitioner records in California.
All 16,966 in California → Every provider in Rancho Cucamonga → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Marie Arpa, MSN FNP-CRancho Cucamonga, CA 917301134552516
- Brianne Bridgeland, ARNPRancho Cucamonga, CA 917301104070598
- Tina Escobedo, N.P.Rancho Cucamonga, CA 917301952555732
- Alea Foster, FNPRancho Cucamonga, CA 917301447501549
- Jeri Geleris, F.N.P.Rancho Cucamonga, CA 917301285993980
- Kristine Gibbs, FNP-CRancho Cucamonga, CA 917301144506429
- Lucy Grey, NPRancho Cucamonga, CA 917301912254210
- Laura Guerrero, NPRancho Cucamonga, CA 917301831292184
Common questions
What is Charlaine Ida Williamson, NP's NPI number?
Charlaine Ida Williamson, NP's National Provider Identifier (NPI) is 1932408960, issued on Mar 16, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Charlaine Ida Williamson, NP located?
The NPPES record lists a practice address at 9170 Haven Ave Ste 120, Rancho Cucamonga, CA, 91730. Phone: (909) 476-8700. Providers update this record themselves, so call before visiting.
How can I verify Charlaine Ida Williamson, NP's license?
NPPES lists California license number 19923, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Charlaine Ida Williamson, NP prescribe under Medicare Part D?
In 2024, Charlaine Ida Williamson, NP had 2,608 Medicare Part D claims for 497 beneficiaries; the average among family nurse practitioner prescribers was 1,305. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.