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DARLENE WILLIAMS MSN, NNP-BC
NPI 1437550555
Nurse Practitioner - Neonatal in Gilbert, AZ

Active since September 08, 2014PECOS Enrolled
1900 N HIGLEY RD, GILBERT, AZ 85234(480) 543-2000 Get Directions Write a Review

NPPES record last updated: February 19, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: May 22, 2023, Aug 30, 2022, Oct 21, 2020 (3 updates tracked since 2020).

About Darlene Williams Msn, Nnp-bc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DARLENE WILLIAMS MSN, NNP-BC (NPI 1437550555) is an individual neonatal provider in Gilbert, Arizona, licensed in Arizona (291205) and active in the NPI registry since September 2014. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1437550555
Entity TypeIndividualFemale
Primary Taxonomy363LN0000X
Provider Legal NameDARLENE WILLIAMSCredential: MSN, NNP-BC
Location Address1900 N HIGLEY RDGilbert, AZ 85234-1604
Mailing Address1900 N Higley RdGilbert, AZ 85234-1604
Phone(480) 543-2000
Sole ProprietorNo
Enumeration DateSeptember 8, 2014
Last NPPES UpdateFebruary 19, 20263 updates tracked since enumeration
NPPES CertifiedFebruary 19, 2026
✔ NPI 1437550555 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · NeonatalPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LN0000X
Licenses✔ Licensed in AZ · 291205✔ Licensed in FL · APRN9431323✔ Licensed in IL · 209026702
1900 N HIGLEY RD, Gilbert, AZ 85234
Open in Google Maps ↗

Other Identifiers 3

Other2JAIMFL · Blue Cross Blue Shield
OtherIQ234ZFL · Medicare
Medicaid018413300FL

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross Blue Shield of Arizona, Oscar Health Maintenance Organization of Florida, Oscar Health Plan, Inc..Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Darlene Williams Msn, Nnp-bc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Darlene Williams reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Banner-University Medical Group
21 mi
Multi-Specialty
2901 N CENTRAL AVE
Phoenix, AZ 85012
  • Reassigned Medicare billing, Arizona enrollment
  • 1,514 clinicians in this Medicare group
NPI 1508809427 (602) 747-4000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 85234 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$85.89 typical visit price
range $55.44 – $168.60
Typical copayment $21.47 (range $13.86 – $42.15)
Most-billed visit code 99203
Established Patient
$98.00 typical visit price
range $17.72 – $137.41
Typical copayment $24.50 (range $4.43 – $34.35)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DALLIN HAZELGREN
Nurse Anesthetist, Certified Registered
1900 N HIGLEY RD
GILBERT, AZ 85234
Maricopa County (480) 543-2000
SANDHYABEN P PATEL M.D.
Internal Medicine
1900 N HIGLEY RD
GILBERT, AZ 85234
Maricopa County (480) 543-2134
TIMOTHY RANDALL STRONG CRNA
Nurse Anesthetist, Certified Registered
1900 N HIGLEY RD
GILBERT, AZ 85234
Maricopa County (480) 534-2600
BANNER HOSPITALISTS
Clinic/Center (Health Service)
1900 N HIGLEY RD
GILBERT, AZ 85234
Maricopa County (480) 543-2000
MR. DAVID SETH ZIMMERMAN PAC
Emergency Medicine
1900 N HIGLEY RD
GILBERT, AZ 85234
Maricopa County (480) 543-2485
JOHN EDWARD ROONEY MD
Hospitalist
1900 N HIGLEY RD
GILBERT, AZ 85234
Maricopa County (480) 543-2034
NICOLE OTERO PA
Physician Assistant
1900 N HIGLEY RD
GILBERT, AZ 85234
Maricopa County (480) 543-2000
MARGARET E MILLER MD
Internal Medicine
1900 N HIGLEY RD
GILBERT, AZ 85234
Maricopa County (480) 543-2034

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Darlene Williams's NPI number?

The NPI number for Darlene Williams is 1437550555. It was assigned to this individual provider in the NPPES registry on September 8, 2014.

Where is Darlene Williams located?

Darlene Williams practices at 1900 N Higley Rd, Gilbert, AZ 85234. The listed phone number is (480) 543-2000.

What is Darlene Williams's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Neonatal, with taxonomy code 363LN0000X.

Is Darlene Williams enrolled in Medicare?

Yes. Darlene Williams is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Darlene Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Darlene Williams reassigns Medicare benefits to Banner-University Medical Group (Phoenix, AZ). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Darlene Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Darlene Williams accept?

Health plans from Blue Cross Blue Shield of Arizona, Oscar Health Maintenance Organization of Florida and Oscar Health Plan, Inc. list Darlene Williams as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Darlene Williams was last updated on February 19, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.