DR. MARK NICHOLAS ZIATS MD, PHD
NPI 1356790091
Internal Medicine in Fort Worth, TX
About Dr. Mark Nicholas Ziats Md, Phd NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARK NICHOLAS ZIATS MD, PHD (NPI 1356790091) is an individual internal medicine provider in Fort Worth, Texas, licensed in South Carolina (MD52161) and active in the NPI registry since June 2016. He is enrolled in Medicare PECOS, is affiliated with Ut Southwestern University Hospital - William P. Clements Jr., and is a graduate of Baylor College Of Medicine (2015).
NPPES Registry Identity
Specialties & Licenses 2
Accepted 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. Mark Nicholas Ziats Md, Phd 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.
Medicare Billing Reassignments
10Medicare enrollment records show Mark Ziats reassigns Medicare billing to 10 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Fort Worth, TX 76104
- Reassigned Medicare billing, Texas enrollment
- Medicare enrollment name: Texas Health Care PLLC
- 511 clinicians in this Medicare group
Granbury, TX 76048
- Reassigned Medicare billing, Texas enrollment
- 16 clinicians in this Medicare group
Granbury, TX 76048
- Reassigned Medicare billing, Texas enrollment
- 123 clinicians in this Medicare group
Cedar Park, TX 78613
- Reassigned Medicare billing, Texas enrollment
- 828 clinicians in this Medicare group
Round Rock, TX 78681
- Reassigned Medicare billing, Texas enrollment
- 206 clinicians in this Medicare group
San Antonio, TX 78216
- Reassigned Medicare billing, Texas enrollment
- 688 clinicians in this Medicare group
Mccormick, SC 29835
- Reassigned Medicare billing, South Carolina enrollment
- 560 clinicians in this Medicare group
North Charleston, SC 29405
- Reassigned Medicare billing, South Carolina enrollment
- 409 clinicians in this Medicare group
Townsend, MT 59644
- Reassigned Medicare billing, Montana enrollment
- Medicare enrollment name: St Peters Health
- 304 clinicians in this Medicare group
Missoula, MT 59804
- Reassigned Medicare billing, Montana enrollment
- 155 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 19
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Ut Southwestern University Hospital - William P. Clements Jr.
Acute Care Hospitals · Dallas, TXTexas Health Harris Methodist Hospital Fort Worth
Acute Care Hospitals · Fort Worth, TXMedical City Weatherford
Acute Care Hospitals · Weatherford, TXLake Granbury Medical Center
Acute Care Hospitals · Granbury, TXTexas Health Harris Methodist Hospital Southwest F
Acute Care Hospitals · Fort Worth, TXPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 76104 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 2
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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 Mark Ziats's NPI number?
The NPI number for Mark Ziats is 1356790091. It was assigned to this individual provider in the NPPES registry on June 3, 2016.
Where is Mark Ziats located?
Mark Ziats practices at 1000 9th Ave Ste C, Fort Worth, TX 76104. The listed phone number is (817) 332-3039.
What is Mark Ziats's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Mark Ziats enrolled in Medicare?
Yes. Mark Ziats 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 Mark Ziats's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Ziats reassigns Medicare benefits to 10 organizations: Texas Health Care, P.L.L.C. (Fort Worth, TX), Brazos Physician Services, PA (Granbury, TX), Lake Granbury Hospital-Based Professional Services (Granbury, TX), Usacs Integrated Acute Care Services Of Texas, PLLC (Cedar Park, TX), Lonestar Pat Associates PA (Round Rock, TX) and 5 more organizations, listed in the Medicare section above. 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 Mark Ziats's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mark Ziats accept?
Health plans from Baylor Scott and White Health Plan, Blue Cross and Blue Shield of Texas, PacificSource Health Plans and Sendero Health Plans, Local Nonprofit list Mark Ziats 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 Mark Ziats affiliated with any hospitals?
According to CMS data, Mark Ziats is affiliated with Ut Southwestern University Hospital - William P. Clements Jr., Texas Health Harris Methodist Hospital Fort Worth, Medical City Weatherford, Lake Granbury Medical Center and Texas Health Harris Methodist Hospital Southwest F.
When was this NPI record last updated?
The NPPES record for Mark Ziats was last updated on January 17, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years 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.
# Dr. Mark Nicholas Ziats, MD, PHD · NPI 1356790091
Internal Medicine physician in Fort Worth, Texas. Individual provider, active in the CMS NPPES registry since June 3, 2016.
## Identity
- **NPI:** 1356790091 (Entity type: Individual)
- **Enumerated:** June 3, 2016
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** MD52161 (South Carolina)
- **Sole proprietor:** No
## Practice location
- **Address:** 1000 9TH AVE STE C, Fort Worth, TX 76104-3906
- **Phone:** (817) 332-3039 · **Fax:** (817) 332-6902
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 10 organizations under Medicare reassignment (form CMS-855R): Texas Health Care, P.L.L.C. (NPI 1619033073, Fort Worth, TX); Brazos Physician Services, PA (NPI 1649117789, Granbury, TX); Lake Granbury Hospital-Based Professional Services (NPI 1689443467, Granbury, TX); Usacs Integrated Acute Care Services Of Texas, PLLC (NPI 1801300322, Cedar Park, TX); Lonestar Pat Associates PA (NPI 1811594203, Round Rock, TX); and 5 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Baylor College Of Medicine, class of 2015
## Record status
- **NPPES last updated:** January 17, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1356790091) · Data from the CMS NPPES public registry.