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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MS. DARBY JOHNSON PA-C
NPI 1255123477
Physician Assistant in Round Rock, TX

Active since May 22, 2025PECOS Enrolled
302 UNIVERSITY BLVD, ROUND ROCK, TX 78665(512) 509-0200 Get Directions Write a Review

NPPES record last updated: October 19, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Ms. Darby Johnson Pa-c NPPES

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

MS. DARBY JOHNSON PA-C (NPI 1255123477) is an individual physician assistant in Round Rock, Texas, licensed in Texas (PA19499) and active in the NPI registry since May 2025. She is enrolled in Medicare PECOS, maintains a secondary practice location in Arlington, and is a graduate of Other (2025).

NPPES Registry Identity

NPI1255123477
Entity TypeIndividualFemale
Primary Taxonomy363A00000X
Provider Legal NameMS. DARBY JOHNSONCredential: PA-C
Location Address302 UNIVERSITY BLVDRound Rock, TX 78665-1032
Mailing AddressPo Box 844658Dallas, TX 75284-4658 · (817) 247-4208
Phone(512) 509-0200
Sole ProprietorYes
Medical School CMSOtherGraduated 2025
Enumeration DateMay 22, 2025
Last NPPES UpdateOctober 19, 2026
NPPES CertifiedOctober 19, 2026
✔ NPI 1255123477 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363A00000X
License✔ Licensed in TX · PA19499
Definition
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
302 UNIVERSITY BLVD, Round Rock, TX 78665
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Secondary Practice Location 1

Location 15204 Hidden Oaks CtArlington, TX 76017-1277 · Phone (817) 247-4208

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Ms. Darby Johnson Pa-c is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID6608336359
PECOS Enrollment IDI20260902001349
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 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
$68.55 typical visit price
range $17.52 – $136.11
Typical copayment $17.13 (range $4.38 – $34.02)
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 20

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

HIRUT NICODIMOS
Physician Assistant (Medical)
302 UNIVERSITY BLVD
ROUND ROCK, TX 78665
Williamson County (512) 509-0200
LISA D HENDERSON CRNA
Nurse Anesthetist, Certified Registered
302 UNIVERSITY BLVD
ROUND ROCK, TX 78665
Williamson County (512) 509-0200
VU NGUYEN
Internal Medicine (Gastroenterology)
302 UNIVERSITY BLVD
ROUND ROCK, TX 78665
Williamson County (512) 509-0200
MR. JOHN L. TROUTNER MD
Psychiatry & Neurology (Psychiatry)
302 UNIVERSITY BLVD
ROUND ROCK, TX 78665
Williamson County (512) 509-8404
DR. RAFAEL EDUARDO GONZALEZ M.D.
Internal Medicine (Interventional Cardiology)
302 UNIVERSITY BLVD
ROUND ROCK, TX 78665
Williamson County (512) 509-0200
KATIE BENJEGERDES HOMAN MD
Dermatology
302 UNIVERSITY BLVD
ROUND ROCK, TX 78665
Williamson County (512) 509-0200
ANEESA PATEL CAA
Anesthesiologist Assistant
302 UNIVERSITY BLVD
ROUND ROCK, TX 78665
Williamson County (512) 509-0200
JASON D PARKER M.D.
Anesthesiology
302 UNIVERSITY BLVD
ROUND ROCK, TX 78665
Williamson County (512) 509-0200

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 Darby Johnson's NPI number?

The NPI number for Darby Johnson is 1255123477. It was assigned to this individual provider in the NPPES registry on May 22, 2025.

Where is Darby Johnson located?

Darby Johnson practices at 302 University Blvd, Round Rock, TX 78665. The listed phone number is (512) 509-0200.

What is Darby Johnson's specialty?

The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.

Is Darby Johnson enrolled in Medicare?

Yes. Darby Johnson is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Darby Johnson was last updated on October 19, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 days 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.