Erin Williams, FNP-C
Nurse Practitioner · Crystal Lake, IL
Erin Williams, FNP-C is a nurse practitioner with a practice address in Crystal Lake, Illinois, and NPI 1093485948, issued on Sep 13, 2021. Check the license (Illinois 209021276, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Erin Williams
- Credential
- FNP-C
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- 209021276 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1305 Randall RD, Crystal Lake, IL 60014
- Phone
- (815) 356-0386
- Enumerated
- Sep 13, 2021
- Record last updated
- Sep 13, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20211201001455); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 4,892 in Illinois → Look up another NPI →
Also registered at 1305 Randall RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Donna Anaski, FNP-BCFamily Nurse Practitioner1326590860
- Valerie Aurel, FNP-CFamily Nurse Practitioner1700351723
- Lisa GazdziakFamily Nurse Practitioner1386310605
- Marina Jones, PHARMDPharmacist1659976942
- Tala Khasawneh, PHARMDPharmacist1578211587
- Christian Lazaro-Marshall, PHARMDPharmacist1215774575
Verify Erin Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this profession
Search for license 209021276Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average nurse practitioner in 2024
34 Medicare Part D claims, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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: $544.18
13 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 38,884 providers of this specialty with any payment received $791.64 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
- Edgewood Clinical Services P.C.Plainfield, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Erin Williams among 4,892 nurse practitioner records in Illinois
Erin Williams, FNP-C is one of 4,892 nurse practitioner records with a practice address in Illinois. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 67% of them.
- NPI issued2021 · 67% of these records are older, 27% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2019 · median 2018 among the 3,389 with a school on file
- Record last updated2021 · 36% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
22 nurse practitioner records list a practice address in Crystal Lake
They are 22 of the 1,442 NPPES records with a practice address in Crystal Lake, and 4,892 nurse practitioner records in Illinois.
All 4,892 in Illinois → Every provider in Crystal Lake → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Jessica Barrera, APNCrystal Lake, IL 600141093356974
- Susan Bockman, MSN, CNPCrystal Lake, IL 600141710266903
- Gina Chmela, APNCrystal Lake, IL 600141558668764
- Candace Esposito, FNP-BCCrystal Lake, IL 600141114568367
- Christine Hepperlen, NPCrystal Lake, IL 600141316017007
- Joanna Hutson, NP-CCrystal Lake, IL 600141730632407
- Sandra Jaeschke, CNPCrystal Lake, IL 600141003815770
- Anna Kastanas, APNCrystal Lake, IL 600141609310259
Common questions
What is Erin Williams, FNP-C's NPI number?
Erin Williams, FNP-C's National Provider Identifier (NPI) is 1093485948, issued on Sep 13, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Erin Williams, FNP-C located?
The NPPES record lists a practice address at 1305 Randall RD, Crystal Lake, IL, 60014. Phone: (815) 356-0386. Providers update this record themselves, so call before visiting.
How can I verify Erin Williams, FNP-C's license?
NPPES lists Illinois license number 209021276, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.
How much does Erin Williams, FNP-C prescribe under Medicare Part D?
In 2024, Erin Williams, FNP-C had 34 Medicare Part D claims; the average among nurse practitioner prescribers was 1,109. 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.