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

Q: 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.

Q: What is Mckenna Williamson's specialty?

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

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: November 01, 2026.

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

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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

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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 Blue Cross and Blue Shield of Texas, Moda Health Plan, Inc., Sendero Health Plans, Local Nonprofit 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

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.

Medicare Billing Reassignments

Medicare enrollment records show Mckenna Williamson reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Austin Regional Clinic, PA

8.1 mi

Family Medicine

6210 E US HWY 290, SUITE 420 - CREDENTIALING
Austin, TX 78723

Reassigned Medicare billing, Texas enrollment
461 clinicians in this Medicare group

NPI 1821157579 (512) 231-5516

Obhg Texas Holdings, P.A.

14 mi

Obstetrics & Gynecology

12221 N MOPAC EXPY
Austin, TX 78758

Reassigned Medicare billing, Texas enrollment
Medicare enrollment name: Obhg Texas Holdings PA
998 clinicians in this Medicare group

NPI 1083917769 (800) 967-2289

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 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 8

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)