1. Home
  2. Directory
  3. Texas
  4. Austin
  5. Obstetrics Gynecology
  6. NPI Profile

DR. MCKENNA ALEXIS WILLIAMSON DO
NPI 1225527773
Obstetrics & Gynecology in Austin, TX

Active since May 09, 2018PECOS EnrolledAccepts Medicare Assignment
4315 JAMES CASEY ST STE 200, AUSTIN, TX 78745(512) 383-9752(512) 406-7336 Get Directions Write a Review

NPPES record last updated: May 10, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: May 10, 2025, Mar 7, 2023, May 24, 2022 and 1 more (4 updates tracked since 2018).

About Dr. Mckenna Alexis Williamson Do NPPES

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

DR. MCKENNA ALEXIS WILLIAMSON DO (NPI 1225527773) is an individual obstetrics & gynecology provider in Austin, Texas, licensed in Texas (T6413) and active in the NPI registry since May 2018. She is enrolled in Medicare PECOS and is a graduate of Michigan State University College Of Osteopathic Medicine (2018).

NPPES Registry Identity

NPI1225527773
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameDR. MCKENNA ALEXIS WILLIAMSONCredential: DO
Location Address4315 JAMES CASEY ST STE 200Austin, TX 78745-3364
Mailing Address6210 E Hwy 290Austin, TX 78723-1142
Phone(512) 383-9752
Fax(512) 406-7336
Sole ProprietorNo
Medical School CMSMichigan State University College Of Osteopathic MedicineGraduated 2018
Enumeration DateMay 9, 2018
Last NPPES UpdateMay 10, 20254 updates tracked since enumeration
NPPES CertifiedMay 10, 2025
✔ NPI 1225527773 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in TX · T6413
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
4315 JAMES CASEY ST STE 200, Austin, TX 78745
Open in Google Maps ↗

Other Names 1

Other Name (5)Dr. Mckenna Alexis Rubalcaba-williamson Do

Other Identifiers 1

OtherT6413TX · Physician Medical License

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

Dr. Mckenna Alexis Williamson Do 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 ID5092063164
PECOS Enrollment IDI20220908001781
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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 78745 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
$131.95 typical visit price
range $57.88 – $174.00
Typical copayment $32.98 (range $14.47 – $43.50)
Most-billed visit code 99204
Established Patient
$71.95 typical visit price
range $18.88 – $142.23
Typical copayment $17.98 (range $4.72 – $35.55)
Most-billed visit code 99213
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 7

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

MRS. BIANCA ELISA FALCON MSN, APRN, FNP-C
Nurse Practitioner (Family)
4315 JAMES CASEY ST STE 200
AUSTIN, TX 78745
Travis County (512) 383-9752
MICHAEL NEWMAN MD
Obstetrics & Gynecology
4315 JAMES CASEY ST STE 200
AUSTIN, TX 78745
Travis County (512) 383-9752
PAUL S BUSHART MD
Obstetrics & Gynecology
4315 JAMES CASEY ST STE 200
AUSTIN, TX 78745
Travis County (512) 383-9752
MADISON WOLF FNP-C
Nurse Practitioner (Family)
4315 JAMES CASEY ST STE 200
AUSTIN, TX 78745
Travis County (512) 383-9752
DR. CRYSTAL BERRY-ROBERTS M.D.
Obstetrics & Gynecology (Gynecology)
4315 JAMES CASEY ST STE 200
AUSTIN, TX 78745
Travis County (512) 383-9752
MRS. ELIDA MARIA RAMOS FNP
Nurse Practitioner (Family)
4315 JAMES CASEY ST STE 200
AUSTIN, TX 78745
Travis County (512) 383-9752
MS. EMILY NYMAN MSN, APRN, FNP-C
Nurse Practitioner (Family)
4315 JAMES CASEY ST STE 200
AUSTIN, TX 78745
Travis County (512) 383-9752

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 Mckenna Williamson's NPI number?

The NPI number for Mckenna Williamson is 1225527773. It was assigned to this individual provider in the NPPES registry on May 9, 2018. The provider is also known as Dr. Mckenna Alexis Rubalcaba-Williamson Do.

Where is Mckenna Williamson located?

Mckenna Williamson practices at 4315 James Casey St Ste 200, Austin, TX 78745. The listed phone number is (512) 383-9752.

What is Mckenna Williamson's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Mckenna Williamson enrolled in Medicare?

Yes. Mckenna Williamson 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 Mckenna Williamson 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 5 other insurers list Mckenna Williamson 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 Mckenna Williamson was last updated on May 10, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.