Frederick Dixon, MD
NPI 1023079613 · Sleep Medicine (Internal Medicine) Physician · San Marcos, TX
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Frederick Dixon, MD is a Sleep Medicine (Internal Medicine) Physician provider in San Marcos, TX (NPI 1023079613).
Provider details
- NPI number
- 1023079613
- Entity type
- Individual
- Primary specialty
- Sleep Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- L5723 (TX)
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
20 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
589 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 156 | $122 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 117 | $161 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 113 | $14 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 68 | $190 |
| Ultrasound of Heart Blood Flow, Valves and Chambers93320 | 40 | $50 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate and Valve Function |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Metoprolol Succinate | 110 | 52 |
| Rivaroxabanbrand: Xarelto | 42 | 12 |
| Carvedilol | 34 | 16 |
| Atorvastatin Calcium | 34 | 18 |
| Apixabanbrand: Eliquis | 28 | — |
| Diltiazem Hclbrand: Diltiazem 24hr Er (cd) | 25 | — |
| Digoxin |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-03-31
- Last updated
- 2019-02-13
Frequently asked questions
- What is Frederick Dixon's NPI number?
- Frederick Dixon's National Provider Identifier (NPI) is 1023079613, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Frederick Dixon's specialty?
- Frederick Dixon is listed in the NPPES registry with a primary specialty of Sleep Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Frederick Dixon located?
- Frederick Dixon's practice location on file with NPPES is 326 N Lbj Dr Ste 104, San Marcos, TX 78666-5624.
- What is Frederick Dixon's phone number?
- The practice phone number listed in the NPPES registry for Frederick Dixon is (512) 572-1033.
- Does Frederick Dixon accept Medicare?
- Frederick Dixon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Frederick Dixon's NPI active?
- Yes — Frederick Dixon's NPI (1023079613) is active in the NPPES registry as of the last update on 2019-02-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.