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Edit this profileWhere to find Charlaine I. Williamson, NP
- Rancho Cucamonga location main office
9170 Haven Ave Ste 120, Rancho Cucamonga, CA 91730 - Fullerton location
100 E Valencia Mesa Dr Ste 105, Fullerton, CA 92835
About Charlaine Williamson
Listed in the NPI registry as a nurse practitioner — family, Charlaine I. Williamson, NP practices in Rancho Cucamonga, CA. According to Medicare claims data, Charlaine cared for 486 Medicare patients across 726 services. The services billed most often include established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report, and hemoglobin a1c level. NPI 1932408960 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (909) 476-8700
- Email not available
Is this your home address or personal number? Hide it
Practice Locations
9170 HAVEN AVE STE 120
Rancho Cucamonga, CA 91730
100 E Valencia Mesa Dr Ste 105
Fullerton, CA 92835
Conditions and Services Within This Provider's Scope
Within Nurse Practitioner - Family generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
Allergies
Allergy & skin
Blood disorders
Bone & joint
Dermatology
Digestive
Digestive health
Eye conditions
Heart health
Hormones & endocrine
Infections
Men's health
Mental health
Metabolic & weight
Nerve & joint
Nerve & spine
Neurological
Pain
Pain & spine
Pediatric infections
Respiratory
Skin
Sleep
Urinary health
Women's health
Procedures & services
Chronic condition care
- Chronic disease management visit
- Diabetic Foot Care
Dermatology
Diagnostic screening
Evaluation & Testing
Hormones & endocrine
Injury care
Lab tests
- COVID-19 testing
- Cholesterol screening
- Hemoglobin A1c Test
- Rapid strep testing
- Thyroid Blood Test
- Urine Drug Screen
Mental health
Minor procedures
- Burn and Wound Care
- Superficial foreign-body removal
- Incision and drainage of an abscess
- Ingrown toenail removal
Minor surgery
Physical exams
Prescriptions
Preventative care
Preventative exams
Sexual health
Skin procedures
Sleep
Urgent care
Weight management
Women's health
- IUD insertion and removal
- Pregnancy Confirmation Test
- Birth control counseling
- Contraceptive implant insertion and removal
- Pap smear
- Well-woman exam
Most searched procedures
Allergies
Diagnostic tests
Ear, nose & throat
- Earwax removal
Heart health
- EKG
Injections
Lifestyle counseling
Neurological care
Occupational health
Pain management
Respiratory care
Screenings
Procedures Most Often Billed to Medicare
726 services · 486 patients · 10 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
12 | Less often than most peers in Nurse Practitioner, Family |
| Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report | Treatment | 95251 |
103 | As often as other peers in Nurse Practitioner, Family |
| Continuous monitoring of blood sugar level in tissue fluid using sensor under skin | Treatment | 95249 |
22 | As often as other peers in Nurse Practitioner, Family |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
411 | More than most peers in Nurse Practitioner, Family |
| Hemoglobin a1c level | Lab test | 83036 |
60 | More often than most peers in Nurse Practitioner, Family |
| Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional | Office visit | 99211 |
35 | More often than most peers in Nurse Practitioner, Family |
| Telephone medical discussion with physician, 11-20 minutes | Office visit | 99442 |
30 | More often than most peers in Nurse Practitioner, Family |
| Telephone medical discussion with physician, 21-30 minutes | Office visit | 99443 |
26 | As often as other peers in Nurse Practitioner, Family |
| Blood test, thyroid stimulating hormone (tsh) | Lab test | 84443 |
14 | Less often than most peers in Nurse Practitioner, Family |
| Blood test, comprehensive group of blood chemicals | Lab test | 80053 |
13 | Less often than most peers in Nurse Practitioner, Family |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other nurse practitioners at this location 1
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 2
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 32 related providers in 4 groups
Other nurse practitioners in Rancho Cucamonga 8
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2010 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Insertion of needle into vein for collection of blood sample 8
Providers in CA who bill this service to Medicare most often.
Common questions
What is Charlaine I. Williamson's specialty?
Charlaine I. Williamson is a nurse practitioner in Rancho Cucamonga, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Nurse Practitioner — Family”.
NPI registry
Where can I find Charlaine I. Williamson?
Charlaine I. Williamson is listed at 9170 Haven Ave Ste 120, Rancho Cucamonga, CA 91730. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Charlaine I. Williamson?
The number on file is (909) 476-8700. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Charlaine I. Williamson's NPI number?
Charlaine I. Williamson's National Provider Identifier is 1932408960. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Charlaine I. Williamson's education?
Charlaine I. Williamson attended Other, graduating in 2010. This comes from the CMS National Downloadable File.
CMS public data
How long has Charlaine I. Williamson been practicing?
Charlaine I. Williamson has 16 years experience. Calculated from a graduation year of 2010, reported in the CMS National Downloadable File.
CMS public data
What is Charlaine I. Williamson known for?
According to Medicare billing data, Charlaine I. Williamson performs procedures including insertion of needle into vein for collection of blood sample; provides treatments such as continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report and continuous monitoring of blood sugar level in tissue fluid using sensor under skin, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Charlaine I. Williamson confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Charlaine I. Williamson. If this is you, claiming it is free.
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