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ALYSSA WILLIAMS PA-C
NPI 1477215952
Physician Assistant - Medical in Austin, TX

Active since October 12, 2021PECOS EnrolledAccepts Medicare Assignment
2559 WESTERN TRAILS BLVD STE 200, AUSTIN, TX 78745(512) 899-2028(512) 899-0311 Get Directions Write a Review

NPPES record last updated: April 28, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Apr 28, 2026, Feb 4, 2022, Nov 23, 2021 and 1 more (4 updates tracked since 2021).

About Alyssa Williams Pa-c NPPES

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

ALYSSA WILLIAMS PA-C (NPI 1477215952) is an individual medical provider in Austin, Texas, licensed in Texas (PA15076) and active in the NPI registry since October 2021. She is enrolled in Medicare PECOS, is affiliated with St David's Medical Center, and is a graduate of Other (2021).

NPPES Registry Identity

NPI1477215952
Entity TypeIndividualFemale
Primary Taxonomy363AM0700X
Provider Legal NameALYSSA WILLIAMSCredential: PA-C
Location Address2559 WESTERN TRAILS BLVD STE 200Austin, TX 78745-1554
Mailing Address2559 Western Trails Blvd Ste 200Austin, TX 78745-1554 · (512) 899-2028
Phone(512) 899-2028
Fax(512) 899-0311
Sole ProprietorNo
Medical School CMSOtherGraduated 2021
Enumeration DateOctober 12, 2021
Last NPPES UpdateApril 28, 20264 updates tracked since enumeration
NPPES CertifiedApril 28, 2026
✔ NPI 1477215952 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPhysician Assistant · MedicalPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363AM0700X
License✔ Licensed in TX · PA15076
Also ListedPhysician AssistantTaxonomy 363A00000X
2559 WESTERN TRAILS BLVD STE 200, Austin, TX 78745
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Alyssa Williams Pa-c 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 ID5193116242
PECOS Enrollment IDI20211228000038
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.

Areas of Expertise CMS Part B claims 3

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
262 services203 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
69 services58 patients
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000
An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.
26 services26 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

St David's Medical Center

Acute Care Hospitals · Austin, TX
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number450431
Location919 E 32nd StAustin, TX 78705 · Travis County
Emergency services Birthing friendly

Intermountain Medical Center

Acute Care Hospitals · Murray, UT
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number460010
Location5121 South Cottonwood StreetMurray, UT 84107 · Salt Lake County
Emergency services Birthing friendly

Referred Medical Equipment & Supplies CMS DME claims 11

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

Tubing with integrated heating element for use with positive airway pressure device A4604
DME-Other DME · category DE001N
10 suppliers28 claims28 services$33.30 avg. paid by Medicare
Full face mask used with positive airway pressure device, each A7030
DME-Other DME · category DE001N
8 suppliers20 claims20 services$77.82 avg. paid by Medicare
Face mask interface, replacement for full face mask, each A7031
DME-Other DME · category DE001N
8 suppliers20 claims57 services$27.51 avg. paid by Medicare
Cushion for use on nasal mask interface, replacement only, each A7032
DME-Other DME · category DE001N
7 suppliers12 claims69 services$15.25 avg. paid by Medicare
Nasal interface (mask or cannula type) used with positive airway pressure device, with or without head strap A7034
DME-Other DME · category DE001N
8 suppliers20 claims20 services$49.19 avg. paid by Medicare
Headgear used with positive airway pressure device A7035
DME-Other DME · category DE001N
11 suppliers29 claims29 services$15.10 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

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

KEVIN KURIAN M.D.
Internal Medicine (Cardiovascular Disease)
2559 WESTERN TRAILS BLVD STE 200
AUSTIN, TX 78745
Travis County (512) 899-2028

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 Alyssa Williams's NPI number?

The NPI number for Alyssa Williams is 1477215952. It was assigned to this individual provider in the NPPES registry on October 12, 2021.

Where is Alyssa Williams located?

Alyssa Williams practices at 2559 Western Trails Blvd Ste 200, Austin, TX 78745. The listed phone number is (512) 899-2028.

What is Alyssa Williams's specialty?

The primary specialty registered for this NPI is Physician Assistant, specializing in Medical, with taxonomy code 363AM0700X.

Is Alyssa Williams enrolled in Medicare?

Yes. Alyssa 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.

What insurance does Alyssa Williams accept?

Health plans from Ambetter Health, Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections and Ambetter from Superior HealthPlan and 7 other insurers list Alyssa 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.

Is Alyssa Williams affiliated with any hospitals?

According to CMS data, Alyssa Williams is affiliated with St David's Medical Center and Intermountain Medical Center.

When was this NPI record last updated?

The NPPES record for Alyssa Williams was last updated on April 28, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.