Mason Rau, MD
NPI 1093274243 · Internal Medicine Physician · Gonzales, LA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mason Rau, MD is a Internal Medicine Physician provider in Gonzales, LA (NPI 1093274243).
Provider details
- NPI number
- 1093274243
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 330991 (LA)
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
7 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
121 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 95 | $119 |
| 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 | 26 | $15 |
Typical Medicare-allowed amounts for these services range $15–$119 (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 · 109 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 216 | 79 |
| Gabapentin | 189 | 51 |
| Amlodipine Besylate | 171 | 53 |
| Pantoprazole Sodium | 114 | 39 |
| Furosemide | 113 | 41 |
| Tamsulosin Hcl | 112 | 32 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,135 across 62 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
Additional practice locations (1)
- 1023 W Highway 30Gonzales, LA 70737-5002Phone: (225) 765-5500Fax: (225) 647-5342
Registry dates
- Enumerated
- 2019-03-18
- Last updated
- 2026-03-13
- Certified
- 2026-03-13
Frequently asked questions
- What is Mason Rau's NPI number?
- Mason Rau's National Provider Identifier (NPI) is 1093274243, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mason Rau's specialty?
- Mason Rau is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mason Rau located?
- Mason Rau's practice location on file with NPPES is 2647 S Saint Elizabeth Blvd Ste 219, Gonzales, LA 70737-5020.
- What is Mason Rau's phone number?
- The practice phone number listed in the NPPES registry for Mason Rau is (225) 647-8511.
- Does Mason Rau accept Medicare?
- Mason Rau is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mason Rau's NPI active?
- Yes — Mason Rau's NPI (1093274243) is active in the NPPES registry as of the last update on 2026-03-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.