NPI registry status
Active
2026 NPPES data Emergency Medicine Physician NPI 1619001252 MD
Verify on CMS → Ernesto Cruz, MD
Emergency Medicine 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 64,398 in Emergency 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
804
Medicare Part D claims · 435 beneficiaries · Emergency Medicine Physician avg: 352
Generic prescribing
91%
generic claims · 2% brand-name · higher generic rates reduce patient out-of-pocket costs
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
Ernesto Cruz, MD filed 804 Medicare Part D claims in 2023 as a Emergency Medicine Physician in Mayaguez, Puerto Rico, prescribing 91% generic.
- 804
- Part D claims, 2023
- 91%
- generic prescribing
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.
Ernesto Cruz, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
804 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)
Ernesto Cruz, 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 Ernesto Cruz, MD?
Quality data not reportedPrimary specialty
Emergency Medicine Physician
Medicare Part D claims
804 128% vs specialty avg
Specialty distribution in Puerto Rico
How Emergency 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 Emergency 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).
Ernesto Cruz, MD appears in the CMS NPPES registry as a Emergency Medicine Physician provider holding MD credentials at CARRETBRA #2 AVE, Mayaguez, PR, 00680, with a listed phone of (787) 833-7383. NPI 1619001252 was issued on 03/15/2007.
Medicare Part D records for calendar year 2023 show 804 prescription claims written by this provider, covering 435 Medicare beneficiaries and totaling roughly $24K in drug spend, split 2% brand-name and 91% generic by claim count.
Emergency Medicine Physician is a high-volume specialty nationwide, with 64,398 enrolled providers across 56 states and an average of 352 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 | 1619001252 |
|---|---|
| Specialty | Emergency Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 03/15/2007 |
Brand vs generic prescribing mix · Generic-heavy
Ernesto Cruz, MD - brand share 2.0%
Emergency Medicine Physician average
2% brand-name claims vs 91% generic, on 804 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.
804
Total Claims
$24K
Total Drug Cost
435
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 844
- Total Day Supply
- 12,203
- Brand vs Generic
- 2% brand / 91% generic
- Brand Drug Cost
- $8K
- Generic Drug Cost
- $16K
- Antibiotic Claims
- 178
Patient Demographics
- Average Patient Age
- 69.8 years
- Avg HCC Risk Score
- 1.89
- Gender Split
- 57% female / 43% male
- Age Distribution
- <65: 103, 65-74: 180, 75-84: 126, 85+: 26
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Ernesto Cruz, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Dexamethasone
Dexamethasone
90 claims
- Famotidine
Famotidine
78 claims
- Lagevrio (Eua)
Lagevrio (Eua)
55 claims
- Amoxicillin-Clavul…
Amoxicillin-Clavulanate Potass
52 claims
- Azithromycin
Azithromycin
49 claims
- Nabumetone
Nabumetone
40 claims
- Naproxen
Naproxen
38 claims
- Buprenorphine-Nalo… 33
Buprenorphine-Naloxone
33 claims
| Drug | Claims |
|---|---|
| Dexamethasone | 90 |
| Famotidine | 78 |
| Lagevrio (Eua) Molnupiravir | 55 |
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 52 |
| Azithromycin | 49 |
| Nabumetone | 40 |
| Naproxen | 38 |
| Buprenorphine-Naloxone Buprenorphine Hcl/Naloxone Hcl | 33 |
| Sulindac | 26 |
| Mupirocin | 22 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Emergency Medicine Physician Overview
How Ernesto Cruz, MD fits within the Emergency Medicine Physician landscape nationally.
64,398
Emergency Medicine Physician Providers in US
56
States with Emergency Medicine Physician
352
Avg Claims per Provider
Ernesto Cruz, MD's 804 claims are above the specialty average of 352.
Nearby Emergency 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 Cruz.
Dr. Rachelly Abreu
M.D.
Bayamon, PR
Thaer Abukhalil
Carolina, PR
Dr. Mario Acosta Duarte
M.D.
San Juan, PR
Edil Agosto Diaz
Carolina, PR
Dr. Miguel Agrait Gonzalez
M.D.
Bayamon, PR
Compare Emergency Medicine 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 Emergency Medicine 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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Frequently Asked Questions
What is Ernesto Cruz, MD's specialty? ▼
Ernesto Cruz, MD specializes in Emergency Medicine Physician and practices in Mayaguez, Puerto Rico. Credentials: MD.
How much does Ernesto Cruz, MD prescribe under Medicare Part D? ▼
In 2023, Ernesto Cruz, MD wrote 804 Medicare Part D claims totaling $24K in drug costs for 435 beneficiaries.
Where is Ernesto Cruz, MD located? ▼
Ernesto Cruz, MD is located at CARRETBRA #2 AVE, Mayaguez, PR, 00680. Phone: (787) 833-7383.
What is Ernesto Cruz, MD's NPI number? ▼
Ernesto Cruz, MD's National Provider Identifier (NPI) is 1619001252, issued on 03/15/2007.
Does Ernesto Cruz, MD prescribe more brand-name or generic drugs? ▼
Ernesto Cruz, MD's prescribing is 2% brand-name and 91% generic drugs by claim count, with $8K in brand drug costs.
How many Emergency Medicine Physician providers are there in the US? ▼
There are 64,398 Emergency Medicine Physician providers across 56 states in the US. The average Emergency Medicine Physician provider writes 352 Medicare Part D claims per year.
What drugs does Ernesto Cruz, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Ernesto Cruz, MD's most frequently prescribed drugs include Dexamethasone, Famotidine, Lagevrio (Eua). This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Ernesto Cruz, MD accept Medicare? ▼
Ernesto Cruz, MD appears in CMS Medicare data with 804 Part D claims and 435 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ernesto Cruz, MD's credentials? ▼
Ernesto Cruz, MD's NPI is 1619001252 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.