2026 NPPES data Oral and Maxillofacial Surgery (Dentist) NPI 1659728061 DMD
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EMMANUEL AMUNDARAY 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
373
Medicare Part D claims · 157 beneficiaries · Oral and Maxillofacial Surgery (Dentist) avg: 378
What the federal data reveals: EMMANUEL AMUNDARAY 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 373 claims across 157 beneficiaries .

What stands out: EMMANUEL AMUNDARAY DIAZ, DMD filed 373 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.

EMMANUEL AMUNDARAY DIAZ, DMD at a glance

Quality data not reported

NPI registry status

Active

Issued 05/16/2016

NPI 1659728061

Primary specialty

Oral and Maxillofacial Surgery (Dentist)

Mid-sized

7,631 US NPIs in this specialty

Medicare Part D claims

373 1% 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).

EMMANUEL AMUNDARAY 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: 1659728061. 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.

EMMANUEL AMUNDARAY DIAZ, DMD appears in the CMS NPPES registry as a Oral and Maxillofacial Surgery (Dentist) provider holding DMD credentials at 735 AVE PONCE DE LEON STE 510, SAN JUAN, PR, 00917, with a listed phone of (787) 250-5055. NPI 1659728061 was issued on 05/16/2016. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what AMUNDARAY 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 373 prescription claims written by this provider, covering 157 Medicare beneficiaries and totaling roughly $2K in drug spend. 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

735 AVE PONCE DE LEON STE 510
SAN JUAN, PR 00917

Provider Details

NPI 1659728061
Specialty Oral and Maxillofacial Surgery (Dentist)
Credentials DMD
Gender Male
NPI Issued 05/16/2016

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

373
Total Claims
$2K
Total Drug Cost
157
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
373
Total Day Supply
4,138
Generic Drug Cost
$2K
Antibiotic Claims
155

Patient Demographics

Average Patient Age
70.8 years
Avg HCC Risk Score
1.56
Gender Split
59% female / 41% 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
Amoxicillin
134
Chlorhexidine Gluconate
124
Ibuprofen
68
Ibu
Ibuprofen
13
Azithromycin
12

* 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 EMMANUEL AMUNDARAY 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

EMMANUEL AMUNDARAY DIAZ, DMD's 373 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 AMUNDARAY DIAZ.

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

Frequently Asked Questions

What is EMMANUEL AMUNDARAY DIAZ, DMD's specialty?
EMMANUEL AMUNDARAY DIAZ, DMD specializes in Oral and Maxillofacial Surgery (Dentist) and practices in SAN JUAN, Puerto Rico. Credentials: DMD.
How much does EMMANUEL AMUNDARAY DIAZ, DMD prescribe under Medicare Part D?
In 2023, EMMANUEL AMUNDARAY DIAZ, DMD wrote 373 Medicare Part D claims totaling $2K in drug costs for 157 beneficiaries.
Where is EMMANUEL AMUNDARAY DIAZ, DMD located?
EMMANUEL AMUNDARAY DIAZ, DMD is located at 735 AVE PONCE DE LEON STE 510, SAN JUAN, PR, 00917. Phone: (787) 250-5055.
What is EMMANUEL AMUNDARAY DIAZ, DMD's NPI number?
EMMANUEL AMUNDARAY DIAZ, DMD's National Provider Identifier (NPI) is 1659728061, issued on 05/16/2016.
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 EMMANUEL AMUNDARAY DIAZ, DMD prescribe most often?
Based on 2023 Medicare Part D data, EMMANUEL AMUNDARAY DIAZ, DMD's most frequently prescribed drugs include Amoxicillin, Chlorhexidine Gluconate, Ibuprofen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does EMMANUEL AMUNDARAY DIAZ, DMD accept Medicare?
EMMANUEL AMUNDARAY DIAZ, DMD appears in CMS Medicare data with 373 Part D claims and 157 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify EMMANUEL AMUNDARAY DIAZ, DMD's credentials?
EMMANUEL AMUNDARAY DIAZ, DMD's NPI is 1659728061 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