2026 NPPES data Oral and Maxillofacial Surgery (Dentist) NPI 1942232871 DMD
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LUIS DIAZ, DMD

Oral and Maxillofacial Surgery (Dentist) in SAN JUAN, Puerto Rico. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
88
Medicare Part D claims · 35 beneficiaries · Oral and Maxillofacial Surgery (Dentist) avg: 378
Generic prescribing
86%
generic claims · 14% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: LUIS DIAZ, DMD is a Oral and Maxillofacial Surgery (Dentist) ([object Object]) practicing in SAN JUAN, Puerto Rico with a Medicare Part D prescribing footprint of 88 claims across 35 beneficiaries — 14% brand-name prescribing .

What stands out: LUIS DIAZ, DMD filed 88 Medicare Part D claims in 2023 across SAN JUAN, Puerto Rico. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

LUIS DIAZ, DMD at a glance

Quality data not reported

NPI registry status

Active

Issued 07/07/2006

NPI 1942232871

Primary specialty

Oral and Maxillofacial Surgery (Dentist)

Mid-sized

7,631 US NPIs in this specialty

Medicare Part D claims

88 77% vs specialty avg

2023 prescription claims

Specialty avg: 378

Specialty distribution in Puerto Rico

How Oral and Maxillofacial Surgery (Dentist) compares to other specialties among Puerto Rico providers

Puerto Rico providers

Oral and Maxillofacial Surgery (Dentist) share within Puerto Rico

1. Oral and Maxillofacial Surgery (Dentist)42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Oral and Maxillofacial Surgery (Dentist) share within Puerto Rico

Specialty board-certification context

Estimated specialty board-certified rate — Oral and Maxillofacial Surgery (Dentist) (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Oral and Maxillofacial Surgery (Dentist) ABMS/AOA estimate

Est. board-certified rate (Oral and Maxillofacial Surgery (Dentist)) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Oral and Maxillofacial Surgery (Dentist)) — ABMS / AOA estimate

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 DIAZ, DMD is a Oral and Maxillofacial Surgery (Dentist) provider practicing in SAN JUAN, Puerto Rico, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: DMD. NPI: 1942232871. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

LUIS DIAZ, DMD appears in the CMS NPPES registry as a Oral and Maxillofacial Surgery (Dentist) provider holding DMD credentials at 400 F.D. ROOSEVELT AVE, SAN JUAN, PR, 00918, with a listed phone of (787) 756-5300. NPI 1942232871 was issued on 07/07/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what DIAZ most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 88 prescription claims written by this provider, covering 35 Medicare beneficiaries and totaling roughly $5K in drug spend, split 14% brand-name and 86% generic by claim count. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Oral and Maxillofacial Surgery (Dentist) is a mid-sized specialty nationwide, with 7,631 enrolled providers across 52 states and an average of 378 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

400 F.D. ROOSEVELT AVE
SAN JUAN, PR 00918

Provider Details

NPI 1942232871
Specialty Oral and Maxillofacial Surgery (Dentist)
Credentials DMD
Gender Male
NPI Issued 07/07/2006

Brand vs generic prescribing mix · Typical

LUIS DIAZ, DMD — brand share 14.0%
Specialty average (est.)

14% brand-name claims vs 86% generic, on 88 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.

88
Total Claims
$5K
Total Drug Cost
35
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
102
Total Day Supply
1,895
Brand vs Generic
14% brand / 86% generic
Brand Drug Cost
$5K
Generic Drug Cost
$698
Antibiotic Claims
24

Patient Demographics

Average Patient Age
74.3 years
Avg HCC Risk Score
1.38
Gender Split
66% female / 34% male

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

Drug Claims
Chlorhexidine Gluconate
22
Amoxicillin
21

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Oral and Maxillofacial Surgery (Dentist) Overview

How LUIS DIAZ, DMD fits within the Oral and Maxillofacial Surgery (Dentist) landscape nationally.

7,631
Oral and Maxillofacial Surgery (Dentist) Providers in US
52
States with Oral and Maxillofacial Surgery (Dentist)
378
Avg Claims per Provider

LUIS DIAZ, DMD's 88 claims are below the specialty average of 378.

Nearby Oral and Maxillofacial Surgery (Dentist) Providers in Puerto Rico

Other clinicians with the same primary specialty enrolled in Puerto Rico, drawn from the same CMS NPPES roster as DIAZ.

Compare Oral and Maxillofacial Surgery (Dentist) nationally: see state-by-state distribution →

Frequently Asked Questions

What is LUIS DIAZ, DMD's specialty?
LUIS DIAZ, DMD specializes in Oral and Maxillofacial Surgery (Dentist) and practices in SAN JUAN, Puerto Rico. Credentials: DMD.
How much does LUIS DIAZ, DMD prescribe under Medicare Part D?
In 2023, LUIS DIAZ, DMD wrote 88 Medicare Part D claims totaling $5K in drug costs for 35 beneficiaries.
Where is LUIS DIAZ, DMD located?
LUIS DIAZ, DMD is located at 400 F.D. ROOSEVELT AVE, SAN JUAN, PR, 00918. Phone: (787) 756-5300.
What is LUIS DIAZ, DMD's NPI number?
LUIS DIAZ, DMD's National Provider Identifier (NPI) is 1942232871, issued on 07/07/2006.
Does LUIS DIAZ, DMD prescribe more brand-name or generic drugs?
LUIS DIAZ, DMD's prescribing is 14% brand-name and 86% generic drugs by claim count, with $5K in brand drug costs.
How many Oral and Maxillofacial Surgery (Dentist) providers are there in the US?
There are 7,631 Oral and Maxillofacial Surgery (Dentist) providers across 52 states in the US. The average Oral and Maxillofacial Surgery (Dentist) provider writes 378 Medicare Part D claims per year.
What drugs does LUIS DIAZ, DMD prescribe most often?
Based on 2023 Medicare Part D data, LUIS DIAZ, DMD's most frequently prescribed drugs include Chlorhexidine Gluconate, Amoxicillin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does LUIS DIAZ, DMD accept Medicare?
LUIS DIAZ, DMD appears in CMS Medicare data with 88 Part D claims and 35 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify LUIS DIAZ, DMD's credentials?
LUIS DIAZ, DMD's NPI is 1942232871 with credentials DMD. 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

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