Mariana Markell, M.D.
NPI 1043204779 · Nephrology Physician · Brooklyn, NY
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mariana Markell, M.D. is a Nephrology Physician provider in Brooklyn, NY (NPI 1043204779).
Provider details
- NPI number
- 1043204779
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 151748-1 (NY)
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
66 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 | 53 | $108 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 13 | $150 |
Typical Medicare-allowed amounts for these services range $108–$150 (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 · 26 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Esomeprazole Magnesium | 70 | 21 |
| Carvedilol | 65 | 19 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 61 | 18 |
| Tamsulosin Hcl | 60 | 19 |
| Prednisone | 60 | 18 |
| Atorvastatin Calcium | 55 | 18 |
| Furosemide | 27 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$135 across 1 record (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
- 2005-09-08
- Last updated
- 2015-02-18
Frequently asked questions
- What is Mariana Markell's NPI number?
- Mariana Markell's National Provider Identifier (NPI) is 1043204779, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mariana Markell's specialty?
- Mariana Markell is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Mariana Markell located?
- Mariana Markell's practice location on file with NPPES is 450 Clarkson Ave, Brooklyn, NY 11203-2056.
- What is Mariana Markell's phone number?
- The practice phone number listed in the NPPES registry for Mariana Markell is (718) 270-1585.
- Does Mariana Markell accept Medicare?
- Mariana Markell is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mariana Markell's NPI active?
- Yes — Mariana Markell's NPI (1043204779) is active in the NPPES registry as of the last update on 2015-02-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.