Ruben Mayer, MD
NPI 1891755039 · Internal Medicine Physician · Columbia, SC
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ruben Mayer, MD is a Internal Medicine Physician provider in Columbia, SC (NPI 1891755039).
Provider details
- NPI number
- 1891755039
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 13804 (SC)
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
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
6,697 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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 1,074 | $8 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 929 | $120 |
| Blood Test, Thyroid Stimulating Hormone (tsh)84443 | 636 | $16 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 633 | $8 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 627 | $13 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 594 | $10 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 154 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Rosuvastatin Calcium | 652 | 188 |
| Levothyroxine Sodium | 590 | 151 |
| Zolpidem Tartrate | 332 | 64 |
| Lisinopril | 322 | 84 |
| Atorvastatin Calcium | 303 | 86 |
| Losartan Potassium | 280 | 75 |
| Amlodipine Besylate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,015 across 55 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
- 2006-03-23
- Last updated
- 2020-11-09
- Certified
- 2020-11-09
Frequently asked questions
- What is Ruben Mayer's NPI number?
- Ruben Mayer's National Provider Identifier (NPI) is 1891755039, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ruben Mayer's specialty?
- Ruben Mayer is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ruben Mayer located?
- Ruben Mayer's practice location on file with NPPES is 4540 Trenholm Rd, Columbia, SC 29206-4462.
- What is Ruben Mayer's phone number?
- The practice phone number listed in the NPPES registry for Ruben Mayer is (803) 790-4700.
- Does Ruben Mayer accept Medicare?
- Ruben Mayer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ruben Mayer's NPI active?
- Yes — Ruben Mayer's NPI (1891755039) is active in the NPPES registry as of the last update on 2020-11-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.