Mark Ziats, MD, PHD
NPI 1356790091 · Internal Medicine Physician · Fort Worth, TX
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Ziats, MD, PHD is a Internal Medicine Physician provider in Fort Worth, TX (NPI 1356790091).
Provider details
- NPI number
- 1356790091
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Male
- Sole proprietor
- No
- License
- MD52161 (SC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
10 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
2,594 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 918 | $16 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 833 | $126 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 141 | $9 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 85 | $8 |
| Hemoglobin A1c Level83036 | 65 | $10 |
| Blood Test, Comprehensive Group of Blood Chemicals |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 83 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 244 | 118 |
| Amlodipine Besylate | 190 | 90 |
| Levothyroxine Sodium | 160 | 67 |
| Losartan Potassium | 154 | 72 |
| Lisinopril | 140 | 74 |
| Alprazolam | 135 | 29 |
| Omeprazole |
Practice location
Mailing address
Registry dates
- Enumerated
- 2016-06-03
- Last updated
- 2024-01-17
- Certified
- 2024-01-17
Frequently asked questions
- What is Mark Ziats's NPI number?
- Mark Ziats's National Provider Identifier (NPI) is 1356790091, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Ziats's specialty?
- Mark Ziats is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Ziats located?
- Mark Ziats's practice location on file with NPPES is 1000 9th Ave Ste C, Fort Worth, TX 76104-3906.
- What is Mark Ziats's phone number?
- The practice phone number listed in the NPPES registry for Mark Ziats is (817) 332-3039.
- Does Mark Ziats accept Medicare?
- Mark Ziats is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Ziats's NPI active?
- Yes — Mark Ziats's NPI (1356790091) is active in the NPPES registry as of the last update on 2024-01-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.