MARYLOU VERGARA WILLIAMS NP
NPI 1548800360
Nurse Practitioner - Family in Henderson, NV

Q: What is Marylou Williams's NPI number?

The NPI number for Marylou Williams is 1548800360. It was assigned to this individual provider in the NPPES registry on January 9, 2020.

Q: What is Marylou Williams's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

Q: When was this NPI record last updated?

The NPPES record for Marylou Williams was last updated on February 28, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.

Active since January 09, 2020PECOS EnrolledAccepts Medicare Assignment

1701 N GREEN VALLEY PKWY STE 7B, HENDERSON, NV 89074(702) 508-9119(702) 551-6255 Get Directions Write a Review

NPPES record last updated: February 28, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Nov 1, 2022, Mar 24, 2021, Jul 8, 2020 and 1 more (4 updates tracked since 2020).

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About Marylou Vergara Williams Np NPPES

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

MARYLOU VERGARA WILLIAMS NP (NPI 1548800360) is an individual family provider in Henderson, Nevada, licensed in Nevada (823744) and active in the NPI registry since January 2020. She is enrolled in Medicare PECOS and is a graduate of Other (2019).

NPPES Registry Identity

NPI1548800360

Entity TypeIndividualFemale

Primary Taxonomy363LF0000X

Provider Legal NameMARYLOU VERGARA WILLIAMSCredential: NP

Location Address1701 N GREEN VALLEY PKWY STE 7BHenderson, NV 89074-5889

Mailing AddressPo Box 80895Las Vegas, NV 89180-0895 · (702) 508-9119 · Fax (702) 551-6255

Phone(702) 508-9119

Fax(702) 551-6255

Sole ProprietorNo

Medical School CMSOtherGraduated 2019

Enumeration DateJanuary 9, 2020

Last NPPES UpdateFebruary 28, 20264 updates tracked since enumeration

NPPES CertifiedFebruary 28, 2026

✔ NPI 1548800360 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse Practitioner · FamilyPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363LF0000X

License✔ Licensed in NV · 823744

Also ListedNurse PractitionerTaxonomy 363L00000X · License 823744 (NV)

1701 N GREEN VALLEY PKWY STE 7B, Henderson, NV 89074

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Molina Healthcare.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Marylou Vergara Williams Np is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID9032545181

PECOS Enrollment IDI20200207001978

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 Reassignments

Medicare enrollment records show Marylou Williams reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Apeksha Desai MD PLLC

Same address

Internal Medicine

1701 N GREEN VALLEY PKWY STE 7B
Henderson, NV 89074

Reassigned Medicare billing, Nevada enrollment
4 clinicians in this Medicare group

NPI 1386364925 (702) 508-9119

Las Vegas Kidney & Hypertension Specialists LLC

1.0 mi

Nephrology

229 N PECOS RD STE 120
Henderson, NV 89074

Reassigned Medicare billing, Nevada enrollment
6 clinicians in this Medicare group

NPI 1992130090 (702) 256-3637

Intermountain Medical Holdings Nevada Inc

4.8 mi

Internal Medicine

595 W LAKE MEAD PKWY
Henderson, NV 89015

Reassigned Medicare billing, Nevada enrollment
521 clinicians in this Medicare group

NPI 1245997279 (702) 566-5500

Qazi Makhija & Barney LLP

10 mi

Nephrology

2820 W CHARLESTON BLVD STE 33
Las Vegas, NV 89102

Reassigned Medicare billing, Nevada enrollment
21 clinicians in this Medicare group

NPI 1548330046 (702) 880-1558

Universal Medical Alliance Inc.

10 mi

Family Medicine

6268 SPRING MOUNTAIN RD STE 115B
Las Vegas, NV 89146

Reassigned Medicare billing, Nevada enrollment
21 clinicians in this Medicare group

NPI 1659995090 (725) 204-1017

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 89074 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

$88.51 typical visit price

range $57.07 – $173.24

Typical copayment $22.12 (range $14.26 – $43.31)

Most-billed visit code 99203

Established Patient

$100.60 typical visit price

range $18.27 – $140.96

Typical copayment $25.15 (range $4.56 – $35.24)

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.

Referred Medical Equipment & Supplies CMS DME claims 3

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431

DME-Oxygen and Supplies · category DC000N

2 suppliers16 claims16 services$15.12 avg. paid by Medicare

Nebulizer, with compressor E0570

DME-Other DME · category DE000N

2 suppliers55 claims55 services$4.37 avg. paid by Medicare

Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390

DME-Oxygen and Supplies · category DC002N

2 suppliers16 claims16 services$67.80 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 4

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

ELIZABETH THERESE COFFMAN PA-C

Physician Assistant (Medical)

1701 N GREEN VALLEY PKWY STE 7B
HENDERSON, NV 89074

Clark County (702) 508-9119

COURTNEY RAE MCDERMOTT PA-C

Physician Assistant

1701 N GREEN VALLEY PKWY STE 7B
HENDERSON, NV 89074

Clark County (702) 508-9119

APEKSHA DESAI MD PLLC

Internal Medicine

1701 N GREEN VALLEY PKWY STE 7B
HENDERSON, NV 89074

Clark County (702) 508-9119

MORGAN AUBREY BUSH

Physician Assistant

1701 N GREEN VALLEY PKWY STE 7B
HENDERSON, NV 89074

Clark County (702) 508-9119

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 Marylou Williams's NPI number?

The NPI number for Marylou Williams is 1548800360. It was assigned to this individual provider in the NPPES registry on January 9, 2020.

Where is Marylou Williams located?

Marylou Williams practices at 1701 N Green Valley Pkwy Ste 7B, Henderson, NV 89074. The listed phone number is (702) 508-9119.

What is Marylou Williams's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

Is Marylou Williams enrolled in Medicare?

Yes. Marylou Williams is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Marylou Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marylou Williams reassigns Medicare benefits to 5 organizations: Apeksha Desai MD PLLC (Henderson, NV), Las Vegas Kidney & Hypertension Specialists LLC (Henderson, NV), Intermountain Medical Holdings Nevada Inc (Henderson, NV), Qazi Makhija & Barney LLP (Las Vegas, NV) and Universal Medical Alliance Inc. (Las Vegas, NV). Each 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 Marylou Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Marylou Williams accept?

Health plans from Molina Healthcare list Marylou 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 Marylou Williams was last updated on February 28, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.