Dr. Mark Nicholas Ziats, MD, PhD

  • Fort Worth, TX
  • Internist
NPI1356790091PAC ID5597050005
Medicare services, 2024
2,594
Medicare patients, 2024
417
Part D claims, 2024
4,550
Publications
29
Hospital affiliations
5
Practice address
1000 9th Ave, Fort Worth, TX 76104
Practice phone
Call (817) 740-8400
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Texas Health Care

Fort Worth, Texas

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Dr. Mark Nicholas Ziats is an internist in Fort Worth, Texas

Dr. Ziats practices at Texas Health Care in Fort Worth, Texas.

Dr. Ziats' NPI, 1356790091, was assigned on June 3, 2016. Dr. Ziats graduated from Baylor College Of Medicine in 2015. Dr. Ziats holds South Carolina license MD52161.

NPI and contact details
Medicare PAC ID
5597050005
NPI enumeration date
June 3, 2016
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(817) 740-8400
Professional email
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Personal email
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Mobile number
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Sex
Male
Estimated age
37
Medical school graduation
2015

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. Mark Nicholas Ziats practices at Texas Health Care in Fort Worth, Texas

Dr. Ziats' primary practice is Texas Health Care, at 1000 9th Ave, Fort Worth, TX 76104 in Tarrant County. The practice phone is (817) 740-8400.

  • Texas Health Care
    1000 9th Ave, Fort Worth, TX 76104 · Tarrant CountyPhone(817) 740-8400

Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data

Dr. Mark Nicholas Ziats is affiliated with 15 sites of care and 8 medical groups

Dr. Ziats' primary practice is Texas Health Care in Fort Worth, Texas. Dr. Ziats is also affiliated with Texas Health Fort Worth. The medical group on file is Texas Health Care. Dmand AI also links Dr. Ziats to 4 more hospitals, 7 medical groups, 5 home health agencies, 2 skilled nursing facilities, 1 group practice or clinic and 1 hospice, each named with a free account.

See all 23 affiliations for Dr. Ziats

Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data

Dmand AI tracks the EHR system at Dr. Mark Nicholas Ziats' practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ziats practices, 14 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Texas Health CareAvailable with a free account
+14 more sites and 7 medical groupsAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Mark Nicholas Ziats is one of 8,437 internists in Texas

Internal medicine is Dr. Ziats' primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Ziats is licensed in South Carolina.

Specialties and state licenses

  • Internal medicine, South CarolinaPrimaryLicense MD52161 · taxonomy 207R00000X

Clinical focus

Dmand AI lists acid reflux, acute kidney failure, acute mini-stroke (TIA), acute sinusitis, acute skin infection, adjustment disease, aneurysm and ankle or foot injury among the conditions Dr. Ziats treats.

Internists near Dr. Ziats

Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Dr. Mark Nicholas Ziats billed Medicare for 2,594 services in 2024

CMS data shows 2,594 Medicare services from Dr. Ziats across 20 procedure codes in 2024, for 417 Medicare patients. Medicare paid $122,609 for them. Every service was in an office.

Medicare services, 20242,594
Medicare patients417
Paid by Medicare$122,609
Procedure codes20

Dr. Ziats' Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Office and hospital visits
2023: 8832024: 1,05920%
Other services
2023: 1202024: 918665%
Lab and pathology
2023: 02024: 476
Surgery
2023: 02024: 141

Dr. Ziats compared with the Texas median for internists, 2024

  • Dr. Ziats
  • Texas median
Medicare services
2,594vs 5394.8 times
Medicare patients
417vs 1902.2 times
Part D claims
3,904vs 28913.5 times

Medians across 7,794 internists in Texas with Dmand AI profiles that report each measure.

Dr. Ziats' most billed Medicare procedure codes, 2024

CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.

See all procedures by Dr. Ziats

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. Mark Nicholas Ziats treated 417 Medicare patients in 2024, average age 77

CMS counts 417 Medicare patients who saw Dr. Ziats in 2024. The largest group is 65 to 74, with 163 patients. 75% of them have high cholesterol, and 72% have high blood pressure. Their average risk score is 1.30, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. Ziats' median patient age at 71, with 51% women.

Medicare patients, 2024417
Average age77
Average risk score1.30

Dr. Ziats' Medicare patients by age, 2024

CMS leaves out age groups with fewer than 11 patients.

Dr. Ziats' Medicare patients by sex, 2024

  • Women23356%
  • Men18444%

Chronic conditions among Dr. Ziats' Medicare patients, 2024

  1. High cholesterol75%
  2. High blood pressure72%
  3. Arthritis52%
  4. Chronic kidney disease29%
  5. Depression28%
  6. Mood disorders28%
  7. Ischemic heart disease25%
  8. Diabetes23%

Share of Medicare patients with each condition. A patient can have several.

Dr. Ziats' patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 71

Patient panel by sex, all payers

  • Women51%
  • Men47%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. Mark Nicholas Ziats wrote 4,550 Medicare Part D claims in 2024

In 2024, Dr. Ziats wrote 4,550 Medicare Part D claims for 760 patients. 90% of them were for generic drugs. CMS names the drug for 3,904 of them, across 83 drugs with 11 or more claims each, at $199,399 in total drug cost. In 2023, CMS named 5,881 claims across 101 drugs.

Part D claims, 20244,550
Drugs named by CMS83
Total drug cost$199,399
Part D patients760

Dr. Ziats' Part D claims by kind of drug, 2024

  • Generic4,114 claims90%
  • Brand-name422 claims9%
  • Other14 claims0%

Dr. Ziats' most prescribed drugs by claims, 2024

CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.

Drug classes CMS tracks in Dr. Ziats' Part D claims, 2024

  • Opioids3%149 of 4,550 claims
  • Antibiotics3%159 of 4,550 claims
  • Antipsychotics, patients 65 and over0%14 of 4,550 claims

Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.

Part D claims for drugs CMS names, 2023 to 2024

  • 2023
  • 2024
Claims for drugs CMS names
2023: 5,8812024: 3,90434%

Drugs named by CMS: 83 in 2024, 101 in 2023.

See all prescribing by Dr. Ziats

Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data

Dr. Mark Nicholas Ziats offers telehealth to Medicare patients

Dr. Ziats accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Ziats as offering telehealth.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Source: Doctors and Clinicians National Downloadable File (CMS)

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Dr. Mark Nicholas Ziats has 29 publications on record

Dmand AI links 29 papers to Dr. Ziats, published from 2006 to 2019. 2016 was the busiest year, with 7. The most frequent topics are Brain, Autism Spectrum Disorder and Autistic Disorder. Dr. Ziats has published most often in Mol Autism. Dr. Ziats' most frequent co-authors are Arthur Beaudet, MD, Christian Patrick Schaaf, MD and Fernando Scaglia, MD.

Papers29
Years published2006 to 2019

Dr. Ziats' papers by year, 2006 to 2019

Topics Dr. Ziats writes about most

  • Brain
  • Autism Spectrum Disorder
  • Autistic Disorder
  • Transcriptome
  • Cerebellum
  • Databases, Genetic
  • Gene Expression Profiling
  • Genetic Predisposition to Disease

Dr. Ziats' most frequent co-authors

Recent publications by Dr. Ziats

See all 29 publications and co-authors

See who Dr. Ziats researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Ziats works with, so you can find a warm path to the right internists.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Dr. Mark Nicholas Ziats received $65 in industry payments from 2019 to 2025

CMS Open Payments shows 4 general payments to Dr. Ziats from 4 drug and device companies from 2019 to 2025. Food and beverage make up the largest share, 100% of the total. BTG International, Inc. paid the most, $19.

General payments to Dr. Ziats by program year, 2019 to 2025

Companies that paid Dr. Ziats the most, 2019 to 2025

Share is of all general payments to this clinician.

See all payments to Dr. Ziats

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Dr. Mark Nicholas Ziats has 4 awards and honors on record

Dmand AI lists 4 awards for Dr. Ziats, most recently Stanley Kaplan Award for Neurobehavioral Research in 2015.

Awards and honors for Dr. Ziats

  1. 2015
    • Stanley Kaplan Award for Neurobehavioral Research
  2. 2014
    • NIH Director's Award for Research
  3. 2013
    • Saul R Korey Award for Neuroscience Research
  4. 2007
    • Phi Beta Kappa

Source: Dmand AI Professional Profile Data

Dr. Mark Nicholas Ziats graduated from Baylor College Of Medicine

Dr. Ziats graduated from Baylor College Of Medicine in 2015.

  1. Medical schoolBaylor College Of Medicine

Source: Dmand AI Professional Profile Data

Sources for Dr. Mark Nicholas Ziats's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data
Primary practice, affiliations and health systemNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Awards and committee rolesDmand AI Professional Profile Data
Training, board certification and membershipsDmand AI Professional Profile Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. Mark Nicholas Ziats

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Dr. Mark Nicholas Ziats' NPI number?

Dr. Mark Nicholas Ziats' NPI number is 1356790091. It was assigned on June 3, 2016, and it is active in the NPI Registry.

What kind of doctor is Dr. Mark Nicholas Ziats?

Dr. Mark Nicholas Ziats is an internist in Fort Worth, Texas. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).

Where does Dr. Mark Nicholas Ziats practice?

Dr. Ziats practices at 1000 9th Ave, Fort Worth, TX 76104. Dr. Ziats' primary practice is Texas Health Care in Fort Worth, Texas. Dmand AI also links Dr. Ziats to 4 hospitals, 7 medical groups, 5 home health agencies, 2 skilled nursing facilities, 1 group practice or clinic and 1 hospice.

What is Dr. Mark Nicholas Ziats' office phone number?

The practice phone on file for Dr. Ziats is (817) 740-8400.

What is Dr. Mark Nicholas Ziats' medical license number?

Dr. Ziats holds South Carolina license MD52161.

Which hospitals is Dr. Mark Nicholas Ziats affiliated with?

Dr. Ziats is affiliated with Texas Health Fort Worth. Dmand AI links Dr. Ziats to 4 more hospitals.

What medical group is Dr. Mark Nicholas Ziats part of?

Dr. Ziats is linked to Texas Health Care. Dmand AI links Dr. Ziats to 7 more medical groups.

Does Dr. Mark Nicholas Ziats accept Medicare?

Yes. CMS data shows Dr. Ziats billed Medicare for 2,594 services in 2024, and Dr. Ziats accepts Medicare assignment.

Does Dr. Mark Nicholas Ziats offer telehealth?

Yes. The CMS Doctors and Clinicians file lists Dr. Ziats as offering telehealth services.

How many Medicare patients does Dr. Mark Nicholas Ziats see?

CMS counts 417 Medicare patients who saw Dr. Ziats in 2024, with an average age of 77.

Show 7 more questionsShow fewer questions

What services does Dr. Mark Nicholas Ziats bill to Medicare?

In 2024, Dr. Ziats' most billed Medicare services were medicare service (G2211), office visit, established patient (99214) and surgery: heart and blood vessels (36415).

Where did Dr. Mark Nicholas Ziats go to medical school?

Dr. Ziats graduated from Baylor College Of Medicine in 2015.

What drugs does Dr. Mark Nicholas Ziats prescribe most?

In 2024 Medicare Part D data, Dr. Ziats' most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Levothyroxine Sodium.

Has Dr. Mark Nicholas Ziats received payments from drug or device companies?

CMS Open Payments shows $65 in general payments to Dr. Ziats from 4 companies from 2019 to 2025. The largest total came from BTG International, Inc.

How long has Dr. Mark Nicholas Ziats been practicing?

Dr. Ziats graduated from medical school in 2015, 11 years ago.

Does Dr. Mark Nicholas Ziats do research?

Dmand AI links 29 publications to Dr. Ziats, published from 2006 to 2019.

Who does Dr. Mark Nicholas Ziats publish with?

Dr. Ziats' most frequent co-authors are Arthur Beaudet, MD (3 shared papers), Christian Patrick Schaaf, MD (3 shared papers) and Fernando Scaglia, MD (2 shared papers).

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