Mark Jennings, MD
NPI 1336379783 · Internal Medicine Physician · Allen, TX
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Jennings, MD is a Internal Medicine Physician provider in Allen, TX (NPI 1336379783).
Provider details
- NPI number
- 1336379783
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
16 yrs in NPPES registry
- Profile completeness25% of score
83% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
10,673 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 1,159 | $8 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 1,055 | $10 |
| Lactate Dehydrogenase (enzyme) Level83615 | 767 | $6 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 758 | $9 |
| Magnesium Level83735 | 708 | $7 |
| Phosphate Level84100 | 708 | $5 |
| Uric Acid Level, Blood |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 52 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Oxycodone Hcl | 152 | 44 |
| Dexamethasone | 116 | 39 |
| Anastrozole | 114 | 25 |
| Prochlorperazine Maleate | 106 | 62 |
| Potassium Chloride | 101 | 27 |
| Hydroxyurea | 97 | 21 |
| Ondansetron Hcl | 85 | 48 |
| Prednisone | 71 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$738 across 40 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-07-20
- Last updated
- 2012-09-12
Frequently asked questions
- What is Mark Jennings's NPI number?
- Mark Jennings's National Provider Identifier (NPI) is 1336379783, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Jennings's specialty?
- Mark Jennings is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Jennings located?
- Mark Jennings's practice location on file with NPPES is 1105 Central Expy N Ste 235, Allen, TX 75013-6135.
- What is Mark Jennings's phone number?
- The practice phone number listed in the NPPES registry for Mark Jennings is (972) 747-6042.
- Does Mark Jennings accept Medicare?
- Mark Jennings is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Jennings's NPI active?
- Yes — Mark Jennings's NPI (1336379783) is active in the NPPES registry as of the last update on 2012-09-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.