Marilyn Horton, M.D.
NPI 1104851906 · Internal Medicine Physician · Dallas, TX
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marilyn Horton, M.D. is a Internal Medicine Physician provider in Dallas, TX (NPI 1104851906).
Provider details
- NPI number
- 1104851906
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- L8079 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
130 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 89 | $57 |
| New Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 15 Minutes Or More99202 | 25 | $72 |
| Hemoglobin A1c Level83036 | 16 | $10 |
Typical Medicare-allowed amounts for these services range $10–$72 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 65 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 376 | 161 |
| Amlodipine Besylate | 167 | 84 |
| Losartan Potassium | 151 | 65 |
| Lisinopril | 107 | 51 |
| Metformin Hcl | 106 | 50 |
| Levothyroxine Sodium | 97 | 43 |
| Gabapentin |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$18 across 1 record (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
Additional practice locations (1)
- 5750 Pineland Dr # 150Dallas, TX 75231-5300Phone: (214) 379-4393Fax: (214) 710-1303
Registry dates
- Enumerated
- 2006-07-11
- Last updated
- 2023-08-08
- Certified
- 2023-08-08
Frequently asked questions
- What is Marilyn Horton's NPI number?
- Marilyn Horton's National Provider Identifier (NPI) is 1104851906, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marilyn Horton's specialty?
- Marilyn Horton is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Marilyn Horton located?
- Marilyn Horton's practice location on file with NPPES is 2360 Gus Thomasson Rd, Dallas, TX 75228-3005.
- What is Marilyn Horton's phone number?
- The practice phone number listed in the NPPES registry for Marilyn Horton is (214) 301-7071.
- Does Marilyn Horton accept Medicare?
- Marilyn Horton is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marilyn Horton's NPI active?
- Yes — Marilyn Horton's NPI (1104851906) is active in the NPPES registry as of the last update on 2023-08-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.