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STELLAMARIS WILLIAMS FNP-BC
NPI 1306355375
Nurse Practitioner - Primary Care in San Antonio, TX

Active since September 21, 2017PECOS EnrolledAccepts Medicare Assignment
8414 FOUNTAIN CIR, SAN ANTONIO, TX 78229(210) 277-7795(210) 277-7550 Get Directions Write a Review

NPPES record last updated: July 15, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jul 15, 2026, Sep 2, 2018, Dec 24, 2017 and 2 more (5 updates tracked since 2017).

About Stellamaris Williams Fnp-bc NPPES

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

STELLAMARIS WILLIAMS FNP-BC (NPI 1306355375) is an individual primary care provider in San Antonio, Texas, licensed in Texas (AP135970) and active in the NPI registry since September 2017. She is enrolled in Medicare PECOS and is a graduate of Other (2016).

NPPES Registry Identity

NPI1306355375
Entity TypeIndividualFemale
Primary Taxonomy363LP2300X
Provider Legal NameSTELLAMARIS WILLIAMSCredential: FNP-BC
Location Address8414 FOUNTAIN CIRSan Antonio, TX 78229-2387
Mailing Address2819 Nw Loop 410San Antonio, TX 78230-5105
Phone(210) 277-7795
Fax(210) 277-7550
Sole ProprietorNo
Medical School CMSOtherGraduated 2016
Enumeration DateSeptember 21, 2017
Last NPPES UpdateJuly 15, 20265 updates tracked since enumeration
NPPES CertifiedJuly 15, 2026
✔ NPI 1306355375 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse Practitioner · Primary CarePhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LP2300X
License✔ Licensed in TX · AP135970
Also ListedNurse Practitioner · FamilyTaxonomy 363LF0000X · License AP135970 (TX)
8414 FOUNTAIN CIR, San Antonio, TX 78229
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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, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Stellamaris Williams Fnp-bc 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 ID244599249
PECOS Enrollment IDI20180122000210
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

5

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

Vpa Of Texas PLLC
0.9 mi
Family Medicine
5414 FREDERICKSBURG RD STE 100A
San Antonio, TX 78229
  • Reassigned Medicare billing, Texas enrollment
  • 802 clinicians in this Medicare group
NPI 1174561575 (210) 468-0800
Restore Primary Care, Wellness And Behavioral Health
7.9 mi
Family Medicine
PARVUS MEDICAL SUITE, LLC, WESTOVER HILLS MEDICAL PLAZA II SUITE 240 11212 ST HWY
San Antonio, TX 78251
  • Reassigned Medicare billing, Texas enrollment
  • 3 clinicians in this Medicare group
NPI 1952047003 (210) 385-8306
Ch Specialty Services Tx PLLC
71 mi
Family
800 W 5TH ST
Austin, TX 78703
  • Reassigned Medicare billing, Texas enrollment
  • 234 clinicians in this Medicare group
NPI 1306225701 (337) 991-9276
Curana Health Medical Group LLC
77 mi
Internal Medicine
8911 N CAPITAL OF TEXAS HWY STE 1110
Austin, TX 78759
  • Reassigned Medicare billing, Texas enrollment
  • 338 clinicians in this Medicare group
NPI 1255640678 (337) 991-9276
Harmonycares Complete Health Services, PLLC
533 mi
Family Medicine
317 E CAPITOL ST STE 200
Jackson, MS 39201
  • Reassigned Medicare billing, Texas enrollment
  • 69 clinicians in this Medicare group
NPI 1093543902 (855) 396-9643

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 78229 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
$84.92 typical visit price
range $54.84 – $166.88
Typical copayment $21.23 (range $13.71 – $41.72)
Most-billed visit code 99203
Established Patient
$97.05 typical visit price
range $17.52 – $136.11
Typical copayment $24.26 (range $4.38 – $34.02)
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

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

Hospital bed, semi-electric (head and foot adjustment), with any type side rails, with mattress E0260
DME-Hospital Beds · category DB000N
1 supplier17 claims17 services$35.27 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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 Stellamaris Williams's NPI number?

The NPI number for Stellamaris Williams is 1306355375. It was assigned to this individual provider in the NPPES registry on September 21, 2017.

Where is Stellamaris Williams located?

Stellamaris Williams practices at 8414 Fountain Cir, San Antonio, TX 78229. The listed phone number is (210) 277-7795.

What is Stellamaris Williams's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Primary Care, with taxonomy code 363LP2300X.

Is Stellamaris Williams enrolled in Medicare?

Yes. Stellamaris 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 Stellamaris Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Stellamaris Williams reassigns Medicare benefits to 5 organizations: Vpa Of Texas PLLC (San Antonio, TX), Restore Primary Care, Wellness And Behavioral Health (San Antonio, TX), Ch Specialty Services Tx PLLC (Austin, TX), Curana Health Medical Group LLC (Austin, TX) and Harmonycares Complete Health Services, PLLC (Jackson, MS). 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 Stellamaris Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Stellamaris Williams accept?

Health plans from Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter from Superior HealthPlan and Ambetter of Oklahoma and 3 other insurers list Stellamaris 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 Stellamaris Williams was last updated on July 15, 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.