DR. FRANCISCO JAVIER DIAZ VIERA MD
NPI 1174180269
Internal Medicine - Cardiovascular Disease in Austin, TX

Q: What is Francisco Diaz Viera's NPI number?

The NPI number for Francisco Diaz Viera is 1174180269. It was assigned to this individual provider in the NPPES registry on May 23, 2019.

Q: What is Francisco Diaz Viera's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Active since May 23, 2019PECOS EnrolledAccepts Medicare Assignment

6818 AUSTIN CENTER BLVD STE 205, AUSTIN, TX 78731(512) 344-0450(512) 406-7318 Get Directions Write a Review

NPPES record last updated: February 5, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Feb 5, 2026, Oct 4, 2023, May 23, 2019 (3 updates tracked since 2019).

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About Dr. Francisco Javier Diaz Viera Md NPPES

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

DR. FRANCISCO JAVIER DIAZ VIERA MD (NPI 1174180269) is an individual cardiovascular disease provider in Austin, Texas, licensed in Texas (T9901) and active in the NPI registry since May 2019. He is enrolled in Medicare PECOS and is a graduate of Other (2019).

NPPES Registry Identity

NPI1174180269

Entity TypeIndividualMale

Primary Taxonomy207RC0000X

Provider Legal NameDR. FRANCISCO JAVIER DIAZ VIERACredential: MD

Location Address6818 AUSTIN CENTER BLVD STE 205Austin, TX 78731-3100

Mailing Address6210 E Hwy 290Austin, TX 78723-1142 · (512) 483-9596 · Fax (512) 406-6216

Phone(512) 344-0450

Fax(512) 406-7318

Sole ProprietorNo

Medical School CMSOtherGraduated 2019

Enumeration DateMay 23, 2019

Last NPPES UpdateFebruary 5, 20263 updates tracked since enumeration

NPPES CertifiedFebruary 5, 2026

✔ NPI 1174180269 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RC0000X

License✔ Licensed in TX · T9901

Definition

An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.

Also ListedInternal MedicineTaxonomy 207R00000X · License 693889 (TX)

6818 AUSTIN CENTER BLVD STE 205, Austin, TX 78731

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas, Harbor Health, Moda Health Plan, Inc. 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. Francisco Javier Diaz Viera Md 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 ID2860961117

PECOS Enrollment IDI20260515000903

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 Francisco Diaz Viera reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Austin Regional Clinic, PA

3.5 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

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 78731 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 9

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

JESSICA LONG DARNUTZER APRN, FNP-C

Nurse Practitioner (Family)