Marc Merbaum, M.D.
NPI 1245204338 · Internal Medicine Physician · Saint Louis, MO
Marc Merbaum, M.D. is a Internal Medicine Physician provider in Saint Louis, MO (NPI 1245204338).
Provider details
- NPI number
- 1245204338
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 116179 (MO)
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
2,548 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 | 440 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 328 | $121 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 239 | $10 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test85027 | 163 | $6 |
| Hemoglobin A1c Level83036 | 139 | $9 |
| Ldl Cholesterol Level83721 | 139 | $10 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 149 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 787 | 210 |
| Lisinopril | 718 | 192 |
| Atorvastatin Calcium | 552 | 148 |
| Levothyroxine Sodium | 518 | 126 |
| Metoprolol Succinate | 506 | 141 |
| Rosuvastatin Calcium | 380 | 113 |
| Simvastatin |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$147 across 7 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
- 2006-02-15
- Last updated
- 2017-02-13
Frequently asked questions
- What is Marc Merbaum's NPI number?
- Marc Merbaum's National Provider Identifier (NPI) is 1245204338, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marc Merbaum's specialty?
- Marc Merbaum is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Marc Merbaum located?
- Marc Merbaum's practice location on file with NPPES is 5034 Griffin Rd, Saint Louis, MO 63128-3418.
- What is Marc Merbaum's phone number?
- The practice phone number listed in the NPPES registry for Marc Merbaum is (314) 843-7333.
- Is Marc Merbaum's NPI active?
- Yes — Marc Merbaum's NPI (1245204338) is active in the NPPES registry as of the last update on 2017-02-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.