NPI registry status
Active
2026 NPPES data Pulmonary Disease Physician NPI 1255344859 MD
Verify on CMS → Luis Nieves Garrastegui, MD
Pulmonary Disease Physician in Rio Piedras, 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 9,271 in Pulmonary Disease 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
7K
Medicare Part D claims · 676 beneficiaries · Pulmonary Disease Physician avg: 1K
Industry payments
$4.5K
23 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Luis Nieves Garrastegui, MD filed 6,586 Medicare Part D claims in 2023 as a Pulmonary Disease Physician in Rio Piedras, Puerto Rico.
- 7K
- Part D claims, 2023
- $4.5K
- 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.
Luis Nieves Garrastegui, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
6,586 Top 4% higher than 96% 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)
Luis Nieves Garrastegui, 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 Nieves Garrastegui, MD?
Quality data not reportedPrimary specialty
Pulmonary Disease Physician
Medicare Part D claims
6,586 352% vs specialty avg
Specialty distribution in Puerto Rico
How Pulmonary Disease 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 Pulmonary Disease 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).
Luis Nieves Garrastegui, MD appears in the CMS NPPES registry as a Pulmonary Disease Physician provider holding MD credentials at 369 AVE. DE DIEGO, Rio Piedras, PR, 00924, with a listed phone of (787) 767-6777. NPI 1255344859 was issued on 08/14/2006.
Medicare Part D records for calendar year 2023 show 6,586 prescription claims written by this provider, covering 676 Medicare beneficiaries and totaling roughly $1.7 million in drug spend.
Pulmonary Disease Physician is a mid-sized specialty nationwide, with 9,271 enrolled providers across 53 states and an average of 1,457 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 | 1255344859 |
|---|---|
| Specialty | Pulmonary Disease Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 08/14/2006 |
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 Nieves Garrastegui, MD. Source: openpaymentsdata.cms.gov.
Total received
$4.5K
Largest payer
Merck Sharp & Dohme LLC
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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
6,586
Total Claims
$1.7M
Total Drug Cost
676
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 7,238
- Total Day Supply
- 207,134
- Generic Drug Cost
- $69K
- Antibiotic Claims
- 206
Patient Demographics
- Average Patient Age
- 73.1 years
- Avg HCC Risk Score
- 1.92
- Gender Split
- 64% female / 36% male
- Age Distribution
- <65: 83, 65-74: 304, 75-84: 226, 85+: 63
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Luis Nieves Garrastegui, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Montelukast Sodium
Montelukast Sodium
964 claims
- Levalbuterol Tartr…
Levalbuterol Tartrate Hfa
914 claims
- Fluticasone Propio…
Fluticasone Propionate
907 claims
- Spiriva Respimat
Spiriva Respimat
565 claims
- Trelegy Ellipta
Trelegy Ellipta
526 claims
- Breo Ellipta 375
Breo Ellipta
375 claims
- Levocetirizine Dih… 349
Levocetirizine Dihydrochloride
349 claims
- Desloratadine 318
Desloratadine
318 claims
| Drug | Claims |
|---|---|
| Montelukast Sodium | 964 |
| Levalbuterol Tartrate Hfa Levalbuterol Tartrate | 914 |
| Fluticasone Propionate | 907 |
| Spiriva Respimat Tiotropium Bromide | 565 |
| Trelegy Ellipta Fluticasone/Umeclidin/Vilanter | 526 |
| Breo Ellipta Fluticasone/Vilanterol | 375 |
| Levocetirizine Dihydrochloride | 349 |
| Desloratadine | 318 |
| Symbicort Budesonide/Formoterol Fumarate | 267 |
| Stiolto Respimat Tiotropium Br/Olodaterol Hcl | 175 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Pulmonary Disease Physician Overview
How Luis Nieves Garrastegui, MD fits within the Pulmonary Disease Physician landscape nationally.
9,271
Pulmonary Disease Physician Providers in US
53
States with Pulmonary Disease Physician
1,457
Avg Claims per Provider
Luis Nieves Garrastegui, MD's 6,586 claims are above the specialty average of 1,457.
Nearby Pulmonary Disease Physician Providers in Puerto Rico
Other clinicians with the same primary specialty enrolled in Puerto Rico, drawn from the same CMS NPPES roster as Nieves Garrastegui.
Dr. Edgardo Adorno-Fontanez
MD
Guaynabo, PR
Dr. Carlos Alcala Marquez
M.D.
San Juan, PR
Dr. Frankie Alvarado
M.D.
San Juan, PR
Dr. Samuel Amill-Acosta
M.D., FCCP
Manati, PR
Dr. Alvaro Aranda- Rodriguez
MD
Guaynabo, PR
Compare Pulmonary Disease 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 Pulmonary Disease 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
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Frequently Asked Questions
What is Luis Nieves Garrastegui, MD's specialty? ▼
Luis Nieves Garrastegui, MD specializes in Pulmonary Disease Physician and practices in Rio Piedras, Puerto Rico. Credentials: MD.
How much does Luis Nieves Garrastegui, MD prescribe under Medicare Part D? ▼
In 2023, Luis Nieves Garrastegui, MD wrote 6,586 Medicare Part D claims totaling $1.7M in drug costs for 676 beneficiaries.
Where is Luis Nieves Garrastegui, MD located? ▼
Luis Nieves Garrastegui, MD is located at 369 AVE. DE DIEGO, Rio Piedras, PR, 00924. Phone: (787) 767-6777.
What is Luis Nieves Garrastegui, MD's NPI number? ▼
Luis Nieves Garrastegui, MD's National Provider Identifier (NPI) is 1255344859, issued on 08/14/2006.
How many Pulmonary Disease Physician providers are there in the US? ▼
There are 9,271 Pulmonary Disease Physician providers across 53 states in the US. The average Pulmonary Disease Physician provider writes 1,457 Medicare Part D claims per year.
What drugs does Luis Nieves Garrastegui, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Luis Nieves Garrastegui, MD's most frequently prescribed drugs include Montelukast Sodium, Levalbuterol Tartrate Hfa, Fluticasone Propionate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Luis Nieves Garrastegui, MD accept Medicare? ▼
Luis Nieves Garrastegui, MD appears in CMS Medicare data with 6,586 Part D claims and 676 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Luis Nieves Garrastegui, MD's credentials? ▼
Luis Nieves Garrastegui, MD's NPI is 1255344859 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.