Mark Nicholas Ziats, MD, PHD
Internal Medicine Physician · Fort Worth, TX
Mark Nicholas Ziats, MD, PHD is an internal medicine physician with a practice address in Fort Worth, Texas, and NPI 1356790091, issued on Jun 3, 2016. Check the license on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mark Nicholas Ziats
- Credential
- MD, PHD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- MD52161 SC
52161 SC
Self-reported in NPPES; status is on the state search - Practice location
- 1000 9TH Ave Ste C, Fort Worth, TX 76104
- Phone
- (817) 332-3039
- Enumerated
- Jun 3, 2016
- Record last updated
- Jan 17, 2024
- Fax
- (817) 332-6902
- Medicare enrollment
- Enrolled (PECOS I20210805002578); accepts Medicare assignment
- Medical or professional school
- Baylor College Of Medicine, 2015
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 9,175 in Texas → Look up another NPI →
Verify Mark Nicholas Ziats in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical BoardCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
43% more Medicare Part D claims than the average internal medicine physician in 2024
4,550 Medicare Part D claims for 760 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 149 claims were for opioids.
Most prescribed
- Atorvastatin Calcium244 claims
- Amlodipine Besylate190 claims
- Levothyroxine Sodium160 claims
- Losartan Potassium154 claims
- Lisinopril140 claims
- Alprazolam135 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through 2 group practices
- Lake Granbury Hospital-Based Professional ServicesGranbury, TX
- Texas Health Care PLLCFort Worth, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Nicholas Ziats among 9,175 internal medicine physician records in Texas
Mark Nicholas Ziats, MD, PHD is one of 9,175 internal medicine physician records with a practice address in Texas. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 74% of them.
- NPI issued2016 · 74% of these records are older, 23% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2015 · median 2004 among the 6,088 with a school on file
- Record last updated2024 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
388 internal medicine physician records list a practice address in Fort Worth
They are 388 of the 15,511 NPPES records with a practice address in Fort Worth, and 9,175 internal medicine physician records in Texas.
All 9,175 in Texas → Every provider in Fort Worth → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Enedina Alcantara, MDFort Worth, TX 761041467449108
- Gargeyi Bandaru, MDFort Worth, TX 761041528040193
- Kendra Belfi, M.D.Fort Worth, TX 761041992705560
- David Capper, MDFt Worth, TX 761041720075690
- Sreedevi Gangireddy, MDFort Worth, TX 761041780657858
- Jessie Hicks, D.O.Fort Worth, TX 761041811994023
- Corbin Hunt, MDFort Worth, TX 761041760458640
- Cecila Karl, MDFort Worth, TX 761041932100468
Common questions
What is Mark Nicholas Ziats, MD, PHD's NPI number?
Mark Nicholas Ziats, MD, PHD's National Provider Identifier (NPI) is 1356790091, issued on Jun 3, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Mark Nicholas Ziats, MD, PHD located?
The NPPES record lists a practice address at 1000 9TH Ave Ste C, Fort Worth, TX, 76104. Phone: (817) 332-3039. Providers update this record themselves, so call before visiting.
How can I verify Mark Nicholas Ziats, MD, PHD's license?
Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark Nicholas Ziats, MD, PHD prescribe under Medicare Part D?
In 2024, Mark Nicholas Ziats, MD, PHD had 4,550 Medicare Part D claims for 760 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.