NPI registry status
Active
2026 NPPES data Adult Medicine Physician NPI 1083612527 MD
Verify on CMS → Luis Marquez, MD
Adult Medicine Physician in San Juan, 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 2,476 in Adult Medicine 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
6K
Medicare Part D claims · 149 beneficiaries · Adult Medicine Physician avg: 3K
Generic prescribing
73%
generic claims · 26% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$601.55
24 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Luis Marquez, MD filed 6,352 Medicare Part D claims in 2024 as an Adult Medicine Physician in San Juan, Puerto Rico, prescribing 73% generic.
- 6K
- Part D claims, 2024
- 73%
- generic prescribing
- $601.55
- industry payments (Sunshine Act)
- ≥95th
- pct by Part D claim volume (lower-bound band)
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.
Federal trust snapshot
What official records show about Luis Marquez, MD
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1083612527), first enumerated 07/08/2005.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 6,352 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Practices in an ABMS-board-eligible specialty; board certification not confirmed in federal records.
- Reported
Industry payment transparency
$601.55 in reported industry payments (24 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1083612527 · Adult Medicine Physician
NPI-10 · ENUM-LEGACY · TAX-NARROW · RX-MID · BOOK-THIN · PHOTO-ENUM
- NPI-10 1083612527
- ENUM-LEGACY 2005
- TAX-NARROW 2,476
- RX-MID 6,352
- BOOK-THIN 28 in Puerto Rico
- PHOTO-ENUM Malcolm Macdonald · 2005
Luis Marquez, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
6,352 ≥ 95th percentile 95% of 1,416,883 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
◑
Board-eligible specialty (heuristic, not verified)
Luis Marquez, 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 Luis Marquez, MD?
Quality data not reportedPrimary specialty
Adult Medicine Physician
Medicare Part D claims
6,352 119% vs specialty avg
Specialty distribution in Puerto Rico
How Adult Medicine 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 Adult Medicine 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).
Practice Address
Provider Details
| NPI | 1083612527 |
|---|---|
| Specialty | Adult Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 07/08/2005 |
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 Luis Marquez, MD. Source: openpaymentsdata.cms.gov.
Total received
$602
Largest payer
Gilead Sciences, 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 · Above average
Luis Marquez, MD - brand share 26.0%
Adult Medicine Physician average
26% brand-name claims vs 73% generic, on 6,352 2024 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 2024.
6,352
Total Claims
$3.7M
Total Drug Cost
149
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 6,764.733
- Total Day Supply
- 196,314
- Brand vs Generic
- 26% brand / 73% generic
- Brand Drug Cost
- $3.6M
- Generic Drug Cost
- $103K
- Opioid Claims
- 110 (1.7% rate)
- Antibiotic Claims
- 81
Patient Demographics
- Average Patient Age
- 66.8 years
- Avg HCC Risk Score
- 1.83
- Gender Split
- 30% female / 70% male
- Age Distribution
- <65: 40, 65-74: 97, 75-84: 12, 85+: 0
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Luis Marquez, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Omega-3 Acid Ethyl…
Omega-3 Acid Ethyl Esters
266 claims
- Gabapentin
Gabapentin
255 claims
- Atorvastatin Calcium
Atorvastatin Calcium
246 claims
- Montelukast Sodium
Montelukast Sodium
207 claims
- Famotidine
Famotidine
194 claims
- Losartan Potassium
Losartan Potassium
192 claims
- Tivicay
Tivicay
165 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
145 claims
| Drug | Claims |
|---|---|
| Omega-3 Acid Ethyl Esters | 266 |
| Gabapentin | 255 |
| Atorvastatin Calcium | 246 |
| Montelukast Sodium | 207 |
| Famotidine | 194 |
| Losartan Potassium | 192 |
| Tivicay Dolutegravir Sodium | 165 |
| Rosuvastatin Calcium | 145 |
| Juluca Dolutegravir/Rilpivirine | 144 |
| Synthroid Levothyroxine Sodium | 122 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Adult Medicine Physician Overview
How Luis Marquez, MD fits within the Adult Medicine Physician landscape nationally.
2,476
Adult Medicine Physician Providers in US
52
States with Adult Medicine Physician
2,896
Avg Claims per Provider
Luis Marquez, MD's 6,352 claims are above the specialty average of 2,896.
Nationwide Adult Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Marquez, both outside Puerto Rico so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2005)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Adult Medicine Physician Providers in Puerto Rico
Other clinicians with the same primary specialty enrolled in Puerto Rico, drawn from the same CMS NPPES roster as Marquez.
One of 28 Adult Medicine Physician providers enrolled in Puerto Rico, 5 are shown here.
Dr. Evans Altenor
MD
San German, PR
Dr. Esperanza Alvarez Rosales
MD
Arecibo, PR
Dr. Nestor Amador-Chacon
MD
Manati, PR
Dr. Carlos Bujosa
M.D.
Guaynabo, PR
Dr. Julio Luis Cadiz Velazquez
M.D
Ponce, PR
Compare Adult Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Luis Marquez, MD's specialty? ▼
Luis Marquez, MD specializes in Adult Medicine Physician and practices in San Juan, Puerto Rico. Credentials: MD.
How much does Luis Marquez, MD prescribe under Medicare Part D? ▼
In 2024, Luis Marquez, MD wrote 6,352 Medicare Part D claims totaling $3.7M in drug costs for 149 beneficiaries.
Where is Luis Marquez, MD located? ▼
Luis Marquez, MD is located at PO BOX 13821, San Juan, PR, 00908. Phone: (787) 480-3000.
What is Luis Marquez, MD's NPI number? ▼
Luis Marquez, MD's National Provider Identifier (NPI) is 1083612527, issued on 07/08/2005.
Does Luis Marquez, MD prescribe more brand-name or generic drugs? ▼
Luis Marquez, MD's prescribing is 26% brand-name and 73% generic drugs by claim count, with $3.6M in brand drug costs.
Does Luis Marquez, MD prescribe opioids? ▼
Yes, Luis Marquez, MD had 110 opioid claims in 2024 with an opioid prescribing rate of 1.7%.
How many Adult Medicine Physician providers are there in the US? ▼
There are 2,476 Adult Medicine Physician providers across 52 states in the US. The average Adult Medicine Physician provider writes 2,896 Medicare Part D claims per year.
What drugs does Luis Marquez, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Luis Marquez, MD's most frequently prescribed drugs include Omega-3 Acid Ethyl Esters, Gabapentin, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Luis Marquez, MD accept Medicare? ▼
Luis Marquez, MD appears in CMS Medicare data with 6,352 Part D claims and 149 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Luis Marquez, MD's credentials? ▼
Luis Marquez, MD's NPI is 1083612527 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 (2024). 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 August 2026 (NPPES) / 2024 (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
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.