Robert Marcus, M.D.
NPI 1588631923 · Internal Medicine Physician · Atlanta, GA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Marcus, M.D. is a Internal Medicine Physician provider in Atlanta, GA (NPI 1588631923).
Provider details
- NPI number
- 1588631923
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 035469 (GA)
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
786 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 | 244 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 189 | $128 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 129 | $90 |
| Automated Urinalysis Test81003 | 62 | $2 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 52 | $14 |
| Administration of Pneumococcal VaccineG0009 | 37 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 110 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 397 | 117 |
| Losartan Potassium | 269 | 78 |
| Amlodipine Besylate | 244 | 76 |
| Levothyroxine Sodium | 217 | 56 |
| Metoprolol Succinate | 213 | 58 |
| Rosuvastatin Calcium | 188 | 58 |
| Lisinopril |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$648 across 22 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
- 2006-03-03
- Last updated
- 2015-11-10
Frequently asked questions
- What is Robert Marcus's NPI number?
- Robert Marcus's National Provider Identifier (NPI) is 1588631923, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Marcus's specialty?
- Robert Marcus is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Marcus located?
- Robert Marcus's practice location on file with NPPES is 4890 Roswell Rd, Atlanta, GA 30342-2606.
- What is Robert Marcus's phone number?
- The practice phone number listed in the NPPES registry for Robert Marcus is (404) 255-9244.
- Does Robert Marcus accept Medicare?
- Robert Marcus is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Marcus's NPI active?
- Yes — Robert Marcus's NPI (1588631923) is active in the NPPES registry as of the last update on 2015-11-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.