NPI registry status
Active
2026 NPPES data Nephrology Physician NPI 1780731257 MD
Verify on CMS → Lesa Thomas Namnoum, MD
Nephrology Physician in Mayaguez, Puerto Rico.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 10,534 in Nephrology Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
853
Medicare Part D claims · 175 beneficiaries · Nephrology Physician avg: 1K
Generic prescribing
80%
generic claims · 19% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$465.38
11 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Lesa Thomas Namnoum, MD filed 853 Medicare Part D claims in 2023 as a Nephrology Physician in Mayaguez, Puerto Rico, prescribing 80% generic.
- 853
- Part D claims, 2023
- 80%
- generic prescribing
- $465.38
- industry payments (Sunshine Act)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Lesa Thomas Namnoum, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
853 Top 27% higher than 73% of 1,370,886 prescribers
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source CMS Medicare Part D Prescriber Public Use File · 2023
◑
Board-eligible specialty (heuristic, not verified)
Lesa Thomas Namnoum, MD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Lesa Thomas Namnoum, MD?
Quality data not reportedPrimary specialty
Nephrology Physician
Medicare Part D claims
853 41% vs specialty avg
Specialty distribution in Puerto Rico
How Nephrology Physician compares to other specialties among Puerto Rico providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Nephrology Physician. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Lesa Thomas Namnoum, MD appears in the CMS NPPES registry as a Nephrology Physician provider holding MD credentials at PR RENAL HEALTH, Mayaguez, PR, 00680, with a listed phone of (787) 986-5050. NPI 1780731257 was issued on 01/05/2007.
Medicare Part D records for calendar year 2023 show 853 prescription claims written by this provider, covering 175 Medicare beneficiaries and totaling roughly $71K in drug spend, split 19% brand-name and 80% generic by claim count.
Nephrology Physician is a mid-sized specialty nationwide, with 10,534 enrolled providers across 55 states and an average of 1,454 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1780731257 |
|---|---|
| Specialty | Nephrology Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 01/05/2007 |
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Lesa Thomas Namnoum, MD. Source: openpaymentsdata.cms.gov.
Total received
$465
Largest payer
CALLIDITAS THERAPEUTICS US INC.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Brand vs generic prescribing mix · Typical
Lesa Thomas Namnoum, MD - brand share 19.0%
Nephrology Physician average
19% brand-name claims vs 80% generic, on 853 2023 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
853
Total Claims
$71K
Total Drug Cost
175
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,120
- Total Day Supply
- 32,748
- Brand vs Generic
- 19% brand / 80% generic
- Brand Drug Cost
- $56K
- Generic Drug Cost
- $14K
- Antibiotic Claims
- 18
Patient Demographics
- Average Patient Age
- 70.5 years
- Avg HCC Risk Score
- 6.64
- Gender Split
- 37% female / 63% male
- Age Distribution
- <65: 44, 65-74: 58, 75-84: 61, 85+: 12
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Lesa Thomas Namnoum, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Sevelamer Carbonate
Sevelamer Carbonate
70 claims
- Farxiga
Farxiga
59 claims
- Nifedipine Er
Nifedipine Er
57 claims
- Doxazosin Mesylate
Doxazosin Mesylate
46 claims
- Amlodipine Besylate
Amlodipine Besylate
42 claims
- Losartan Potassium
Losartan Potassium
40 claims
- Gabapentin
Gabapentin
31 claims
- Lisinopril 27
Lisinopril
27 claims
| Drug | Claims |
|---|---|
| Sevelamer Carbonate | 70 |
| Farxiga Dapagliflozin Propanediol | 59 |
| Nifedipine Er Nifedipine | 57 |
| Doxazosin Mesylate | 46 |
| Amlodipine Besylate | 42 |
| Losartan Potassium | 40 |
| Gabapentin | 31 |
| Lisinopril | 27 |
| Calcium Acetate | 26 |
| Hydralazine Hcl | 21 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Nephrology Physician Overview
How Lesa Thomas Namnoum, MD fits within the Nephrology Physician landscape nationally.
10,534
Nephrology Physician Providers in US
55
States with Nephrology Physician
1,454
Avg Claims per Provider
Lesa Thomas Namnoum, MD's 853 claims are below the specialty average of 1,454.
Nearby Nephrology Physician Providers in Puerto Rico
Other clinicians with the same primary specialty enrolled in Puerto Rico, drawn from the same CMS NPPES roster as Thomas Namnoum.
Dr. Marco Albarran Portilla
MD
Ponce, PR
Dr. Praxedes Alvarez
M.D.
Ponce, PR
Dr. Sergio Alvarez Torres
M.D
Adjuntas, PR
Dr. Krystahl Andujar-Rivera
MD
Carolina, PR
Dr. Alberto Arevalo Roig
MD
Arecibo, PR
Compare Nephrology Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Puerto Rico medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Nephrology Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
Healthcare Guides
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Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Puerto Rico
Frequently Asked Questions
What is Lesa Thomas Namnoum, MD's specialty? ▼
Lesa Thomas Namnoum, MD specializes in Nephrology Physician and practices in Mayaguez, Puerto Rico. Credentials: MD.
How much does Lesa Thomas Namnoum, MD prescribe under Medicare Part D? ▼
In 2023, Lesa Thomas Namnoum, MD wrote 853 Medicare Part D claims totaling $71K in drug costs for 175 beneficiaries.
Where is Lesa Thomas Namnoum, MD located? ▼
Lesa Thomas Namnoum, MD is located at PR RENAL HEALTH, Mayaguez, PR, 00680. Phone: (787) 986-5050.
What is Lesa Thomas Namnoum, MD's NPI number? ▼
Lesa Thomas Namnoum, MD's National Provider Identifier (NPI) is 1780731257, issued on 01/05/2007.
Does Lesa Thomas Namnoum, MD prescribe more brand-name or generic drugs? ▼
Lesa Thomas Namnoum, MD's prescribing is 19% brand-name and 80% generic drugs by claim count, with $56K in brand drug costs.
How many Nephrology Physician providers are there in the US? ▼
There are 10,534 Nephrology Physician providers across 55 states in the US. The average Nephrology Physician provider writes 1,454 Medicare Part D claims per year.
What drugs does Lesa Thomas Namnoum, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Lesa Thomas Namnoum, MD's most frequently prescribed drugs include Sevelamer Carbonate, Farxiga, Nifedipine Er. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Lesa Thomas Namnoum, MD accept Medicare? ▼
Lesa Thomas Namnoum, MD appears in CMS Medicare data with 853 Part D claims and 175 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Lesa Thomas Namnoum, MD's credentials? ▼
Lesa Thomas Namnoum, MD's NPI is 1780731257 with credentials MD. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Compiled from official public sources by the PlainDoctor editorial team.