NPI registry status
Active
2026 NPPES data Nephrology Physician NPI 1790133718 M. D.
Verify on CMS → Luis Diaz Cruz, M. D.
Nephrology Physician in Toa Baja, 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 10,806 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
2K
Medicare Part D claims · 490 beneficiaries · Nephrology Physician avg: 2K
Generic prescribing
54%
generic claims · 46% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$872.19
30 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Luis Diaz Cruz, M. D. filed 2,495 Medicare Part D claims in 2024 as a Nephrology Physician in Toa Baja, Puerto Rico, prescribing 54% generic.
- 2K
- Part D claims, 2024
- 54%
- generic prescribing
- $872.19
- industry payments (Sunshine Act)
- ≥86th
- 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 Diaz Cruz, M. D.
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 1790133718), first enumerated 05/31/2016.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 2,495 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
$872.19 in reported industry payments (30 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 1790133718 · Nephrology Physician
NPI-10 · ENUM-MID · TAX-MID · RX-MID · BOOK-THIN · PHOTO-ENUM
- NPI-10 1790133718
- ENUM-MID 2016
- TAX-MID 11K Nephrology Physician
- RX-MID 2,495
- BOOK-THIN 111 in Puerto Rico
- PHOTO-ENUM Mohammad Ahraz Hussain · 2016
Luis Diaz Cruz, M. D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
2,495 ≥ 86th percentile 86% 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 Diaz Cruz, M. D. 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 Diaz Cruz, M. D.?
Quality data not reportedPrimary specialty
Nephrology Physician
Medicare Part D claims
2,495 65% 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).
Practice Address
Provider Details
| NPI | 1790133718 |
|---|---|
| Specialty | Nephrology Physician |
| Credentials | M. D. |
| Gender | Male |
| NPI Issued | 05/31/2016 |
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 Diaz Cruz, M. D.. Source: openpaymentsdata.cms.gov.
Total received
$872
Largest payer
AstraZeneca Pharmaceuticals LP
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 Diaz Cruz, M. D. - brand share 46.0%
Nephrology Physician average
46% brand-name claims vs 54% generic, on 2,495 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.
2,495
Total Claims
$752K
Total Drug Cost
490
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,944.367
- Total Day Supply
- 86,930
- Brand vs Generic
- 46% brand / 54% generic
- Brand Drug Cost
- $724K
- Generic Drug Cost
- $28K
- Antibiotic Claims
- 17
Patient Demographics
- Average Patient Age
- 74.0 years
- Avg HCC Risk Score
- 2.11
- Gender Split
- 56% female / 44% male
- Age Distribution
- <65: 44, 65-74: 208, 75-84: 195, 85+: 43
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Luis Diaz Cruz, M. D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Farxiga
Farxiga
646 claims
- Losartan Potassium 196
Losartan Potassium
196 claims
- Amlodipine Besylate 163
Amlodipine Besylate
163 claims
- Lokelma 118
Lokelma
118 claims
- Jardiance 101
Jardiance
101 claims
- Tradjenta 88
Tradjenta
88 claims
- Omega-3 Acid Ethyl… 73
Omega-3 Acid Ethyl Esters
73 claims
- Carvedilol 70
Carvedilol
70 claims
| Drug | Claims |
|---|---|
| Farxiga Dapagliflozin Propanediol | 646 |
| Losartan Potassium | 196 |
| Amlodipine Besylate | 163 |
| Lokelma Sodium Zirconium Cyclosilicate | 118 |
| Jardiance Empagliflozin | 101 |
| Tradjenta Linagliptin | 88 |
| Omega-3 Acid Ethyl Esters | 73 |
| Carvedilol | 70 |
| Metformin Hcl | 49 |
| Allopurinol | 48 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Nephrology Physician Overview
How Luis Diaz Cruz, M. D. fits within the Nephrology Physician landscape nationally.
10,806
Nephrology Physician Providers in US
55
States with Nephrology Physician
1,511
Avg Claims per Provider
Luis Diaz Cruz, M. D.'s 2,495 claims are above the specialty average of 1,511.
Nationwide Nephrology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Diaz Cruz, both outside Puerto Rico so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2016)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
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 Diaz Cruz.
One of 111 Nephrology Physician providers enrolled in Puerto Rico, 5 are shown here.
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 →
Frequently Asked Questions
What is Luis Diaz Cruz, M. D.'s specialty? ▼
Luis Diaz Cruz, M. D. specializes in Nephrology Physician and practices in Toa Baja, Puerto Rico. Credentials: M. D..
How much does Luis Diaz Cruz, M. D. prescribe under Medicare Part D? ▼
In 2024, Luis Diaz Cruz, M. D. wrote 2,495 Medicare Part D claims totaling $752K in drug costs for 490 beneficiaries.
Where is Luis Diaz Cruz, M. D. located? ▼
Luis Diaz Cruz, M. D. is located at A LA ORDEN SHOPPING CENTER 2ND FL 600, Toa Baja, PR, 00950. Phone: (787) 710-2532.
What is Luis Diaz Cruz, M. D.'s NPI number? ▼
Luis Diaz Cruz, M. D.'s National Provider Identifier (NPI) is 1790133718, issued on 05/31/2016.
Does Luis Diaz Cruz, M. D. prescribe more brand-name or generic drugs? ▼
Luis Diaz Cruz, M. D.'s prescribing is 46% brand-name and 54% generic drugs by claim count, with $724K in brand drug costs.
How many Nephrology Physician providers are there in the US? ▼
There are 10,806 Nephrology Physician providers across 55 states in the US. The average Nephrology Physician provider writes 1,511 Medicare Part D claims per year.
What drugs does Luis Diaz Cruz, M. D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Luis Diaz Cruz, M. D.'s most frequently prescribed drugs include Farxiga, Losartan Potassium, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Luis Diaz Cruz, M. D. accept Medicare? ▼
Luis Diaz Cruz, M. D. appears in CMS Medicare data with 2,495 Part D claims and 490 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Luis Diaz Cruz, M. D.'s credentials? ▼
Luis Diaz Cruz, M. D.'s NPI is 1790133718 with credentials M. D.. 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.