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ROSEMARY NUSTAS
NPI 1689094880
Internal Medicine - Gastroenterology in Dallas, TX

Active since April 27, 2014PECOS EnrolledAccepts Medicare Assignment
86.26/100
CMS Quality Rating
8220 WALNUT HILL LN STE 710, DALLAS, TX 75231(214) 368-6707(214) 368-1804 Get Directions Write a Review

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

Record update history: Mar 19, 2026, Nov 20, 2024, Nov 5, 2021 (3 updates tracked since 2021).

About Rosemary Nustas NPPES

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

ROSEMARY NUSTAS (NPI 1689094880) is an individual gastroenterology provider in Dallas, Texas, licensed in Texas (R1839) and active in the NPI registry since April 2014. She is enrolled in Medicare PECOS, is affiliated with Christus Mother Frances Hospital, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1689094880
Entity TypeIndividualFemale
Primary Taxonomy207RG0100X
Provider Legal NameROSEMARY NUSTAS
Location Address8220 WALNUT HILL LN STE 710Dallas, TX 75231-4427
Mailing AddressPo Box 35629Dallas, TX 75235-0629 · (214) 424-2200 · Fax (214) 231-2159
Phone(214) 368-6707
Fax(214) 368-1804
Sole ProprietorNo
Medical School CMSOtherGraduated 2012
Enumeration DateApril 27, 2014
Last NPPES UpdateMarch 19, 20263 updates tracked since enumeration
NPPES CertifiedMarch 19, 2026
✔ NPI 1689094880 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
Licenses✔ Licensed in TX · R1839✔ Licensed in MA · 286678
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
8220 WALNUT HILL LN STE 710, Dallas, TX 75231
Open in Google Maps ↗

Secondary Practice Locations 2

Location 1215 Airport RdSulphur Springs, TX 75482-2011 · Phone (903) 885-1770
Location 21493 Cambridge StCambridge, MA 02139-1099 · Phone (617) 665-1634

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas, UnitedHealthcare.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

Rosemary Nustas 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 ID8224255864
PECOS Enrollment IDI20170711002829
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

3

Medicare enrollment records show Rosemary Nustas reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

University Of Texas Southwestern Medical Center At Dallas
6.6 mi
Psychiatry
5323 HARRY HINES BLVD
Dallas, TX 75390
  • Reassigned Medicare billing, Texas enrollment
  • 5,299 clinicians in this Medicare group
NPI 1871563494 (214) 648-5555
Texas Digestive Disease Consultants, PLLC
11 mi
Gastroenterology
701 TUSCAN DR, STE 110
Irving, TX 75039
  • Reassigned Medicare billing, Texas enrollment
  • 575 clinicians in this Medicare group
NPI 1053397331 (214) 496-1100
Christus Trinity Clinic Texas
93 mi
Family Medicine
520 DOUGLAS BLVD
Tyler, TX 75702
  • Reassigned Medicare billing, Texas enrollment
  • 2,745 clinicians in this Medicare group
NPI 1285684225 (903) 315-4119

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Christus Mother Frances Hospital

Acute Care Hospitals · Tyler, TX
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number450102
Location800 East DawsonTyler, TX 75701 · Smith County
Emergency services Birthing friendly

Christus Mother Frances Hospital Sulphur Springs

Acute Care Hospitals · Sulphur Springs, TX
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number450236
Location115 Airport RdSulphur Springs, TX 75482 · Hopkins County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 75231 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
$131.01 typical visit price
range $57.18 – $172.86
Typical copayment $32.75 (range $14.29 – $43.21)
Most-billed visit code 99204
Established Patient
$100.80 typical visit price
range $18.48 – $141.20
Typical copayment $25.20 (range $4.62 – $35.30)
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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

86.26/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality78.84
Promoting Interoperability100
Improvement Activities40
Cost58.7

Other Providers at the Same Location NPPES 10

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

DR. SAMI NACI ARSLANLAR MD
Internal Medicine (Gastroenterology)
8220 WALNUT HILL LN STE 710
DALLAS, TX 75231
Dallas County (214) 368-6707
DR. SAMAR HARRIS M.D.
Internal Medicine (Gastroenterology)
8220 WALNUT HILL LN STE 710
DALLAS, TX 75231
Dallas County (143) 686-7072
JENNIFER LISCH MIRON PA-C
Physician Assistant
8220 WALNUT HILL LN STE 710
DALLAS, TX 75231
Dallas County (214) 368-6707
DR. LISA CRISTINA ALVAREZ M.D.
Internal Medicine (Gastroenterology)
8220 WALNUT HILL LN STE 710
DALLAS, TX 75231
Dallas County (214) 368-6707
DR. JAMES D HAKERT M.D.
Internal Medicine (Gastroenterology)
8220 WALNUT HILL LN STE 710
DALLAS, TX 75231
Dallas County (214) 368-6707
DR. JOHN WILLIAM SECOR M.D.
Internal Medicine (Gastroenterology)
8220 WALNUT HILL LN STE 710
DALLAS, TX 75231
Dallas County (214) 368-6707
DR. VIRALKUMAR VINAYCHANDRA PATEL MD
Internal Medicine (Gastroenterology)
8220 WALNUT HILL LN STE 710
DALLAS, TX 75231
Dallas County (214) 368-6707
DR. JOHN C LEE M.D.
Internal Medicine (Gastroenterology)
8220 WALNUT HILL LN STE 710
DALLAS, TX 75231
Dallas County (214) 368-6707

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 Rosemary Nustas's NPI number?

The NPI number for Rosemary Nustas is 1689094880. It was assigned to this individual provider in the NPPES registry on April 27, 2014.

Where is Rosemary Nustas located?

Rosemary Nustas practices at 8220 Walnut Hill Ln Ste 710, Dallas, TX 75231. The listed phone number is (214) 368-6707.

What is Rosemary Nustas's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Rosemary Nustas enrolled in Medicare?

Yes. Rosemary Nustas 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.

Which organizations bill Medicare for Rosemary Nustas's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Rosemary Nustas reassigns Medicare benefits to 3 organizations: University Of Texas Southwestern Medical Center At Dallas (Dallas, TX), Texas Digestive Disease Consultants, PLLC (Irving, TX) and Christus Trinity Clinic Texas (Tyler, TX). Each 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 Rosemary Nustas's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Rosemary Nustas accept?

Health plans from Blue Cross and Blue Shield of Texas and UnitedHealthcare list Rosemary Nustas 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.

Is Rosemary Nustas affiliated with any hospitals?

According to CMS data, Rosemary Nustas is affiliated with Christus Mother Frances Hospital and Christus Mother Frances Hospital Sulphur Springs.

When was this NPI record last updated?

The NPPES record for Rosemary Nustas was last updated on March 19, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.