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ALEXIS MELLEM
NPI 1346522877
Nurse Practitioner - Neonatal in Round Rock, TX

Active since September 11, 2011PECOS Enrolled
300 UNIVERSITY BLVD, ROUND ROCK, TX 78665(512) 509-0100 Get Directions Write a Review

NPPES record last updated: January 4, 2024. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jan 4, 2024, Nov 22, 2023, Jan 29, 2021 (3 updates tracked since 2021).

About Alexis Mellem NPPES

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

ALEXIS MELLEM (NPI 1346522877) is an individual neonatal provider in Round Rock, Texas, licensed in Texas (AP121297) and active in the NPI registry since September 2011. She is enrolled in Medicare PECOS and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1346522877
Entity TypeIndividualFemale
Primary Taxonomy363LN0000X
Provider Legal NameALEXIS MELLEM
Location Address300 UNIVERSITY BLVDRound Rock, TX 78665-1032
Mailing AddressPo Box 844658Dallas, TX 75284-4658 · (512) 963-2807
Phone(512) 509-0100
Sole ProprietorNo
Enumeration DateSeptember 11, 2011
Last NPPES UpdateJanuary 4, 20243 updates tracked since enumeration
NPPES CertifiedJanuary 4, 2024
✔ NPI 1346522877 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 TX · AP121297✔ Licensed in TX · 719875
300 UNIVERSITY BLVD, Round Rock, TX 78665
Open in Google Maps ↗

Secondary Practice Locations 2

Location 11201 W 38th St Fl 8Austin, TX 78705-1006 · Phone (512) 324-1085
Location 23220 Feathergrass Ct, apt 9125Austin, TX 78758-7777 · Phone (512) 963-2807

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas, Oscar Health, Oscar Insurance Company 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 (PECOS)

Alexis Mellem 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 Alexis Mellem reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Scott & White Clinic
8.8 mi
Internal Medicine
1701 E PFLUGERVILLE PKWY
Pflugerville, TX 78660
  • Reassigned Medicare billing, Texas enrollment
  • 2,795 clinicians in this Medicare group
NPI 1679691729 (512) 259-6000

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 78665 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.

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.

BRENNEN J. BEATTY MD
Emergency Medicine
300 UNIVERSITY BLVD
ROUND ROCK, TX 78665
Williamson County (512) 509-0100
KATHLEEN SUSAN GRADY-GREENE ARNP
Nurse Practitioner (Neonatal)
300 UNIVERSITY BLVD
ROUND ROCK, TX 78665
Williamson County (512) 509-0200
MATTHEW RYAN DANLEY D.O.
Anesthesiology
300 UNIVERSITY BLVD
ROUND ROCK, TX 78665
Williamson County (512) 509-0100
CODY R. QUIRK M.D.
Radiology (Diagnostic Radiology)
300 UNIVERSITY BLVD
ROUND ROCK, TX 78665
Williamson County (512) 509-0100
CAITLIN O'CONNOR CRNA
Nurse Anesthetist, Certified Registered
300 UNIVERSITY BLVD
ROUND ROCK, TX 78665
Williamson County (512) 509-0100
MARCEL ALBERT GRAF AA-C
Anesthesiologist Assistant
300 UNIVERSITY BLVD
ROUND ROCK, TX 78665
Williamson County (512) 509-0200
SADIE JOHNSON RN
Registered Nurse
300 UNIVERSITY BLVD
ROUND ROCK, TX 78665
Williamson County (940) 595-0169
DR. JACLYN NGOC MINH NGUYEN MD
Emergency Medicine
300 UNIVERSITY BLVD
ROUND ROCK, TX 78665
Williamson County (512) 509-0100

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 Alexis Mellem's NPI number?

The NPI number for Alexis Mellem is 1346522877. It was assigned to this individual provider in the NPPES registry on September 11, 2011.

Where is Alexis Mellem located?

Alexis Mellem practices at 300 University Blvd, Round Rock, TX 78665. The listed phone number is (512) 509-0100.

What is Alexis Mellem's specialty?

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

Is Alexis Mellem enrolled in Medicare?

Yes. Alexis Mellem is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Alexis Mellem's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Alexis Mellem reassigns Medicare benefits to Scott & White Clinic (Pflugerville, TX). 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 Alexis Mellem's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Alexis Mellem accept?

Health plans from Blue Cross and Blue Shield of Texas, Oscar Health, Oscar Insurance Company and Sendero Health Plans, Local Nonprofit list Alexis Mellem 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 Alexis Mellem was last updated on January 4, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years 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.