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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

DR. LILIANA M DIEZ D.M.D.
NPI 1801830435
Dentist - Periodontics in Mayaguez, PR

Active since June 15, 2006PECOS Enrolled
#21 DR. NELSON PEREA ST., MAYAGUEZ, PR 00680(787) 833-8741(787) 833-8741 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dr. Liliana M Diez D.m.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. LILIANA M DIEZ D.M.D. (NPI 1801830435) is an individual periodontics provider in Mayaguez, Puerto Rico, licensed in Puerto Rico (1135) and active in the NPI registry since June 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1801830435
Entity TypeIndividualFemale
Primary Taxonomy1223P0300X
Provider Legal NameDR. LILIANA M DIEZCredential: D.M.D.
Location Address#21 DR. NELSON PEREA ST.Mayaguez, PR 00680
Mailing Address#21 Dr. Nelson Perea St.Mayaguez, PR 00680 · (787) 833-8741 · Fax (787) 833-8741
Phone(787) 833-8741
Fax(787) 833-8741
Sole ProprietorNo
Enumeration DateJune 15, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1801830435 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentist · PeriodonticsDental Providers
Taxonomy Code1223P0300X
License✔ Licensed in PR · 1135
Definition

That specialty of dentistry which encompasses the prevention, diagnosis and treatment of diseases of the supporting and surrounding tissues of the teeth or their substitutes and the maintenance of the health, function and esthetics of these structures and tissues.

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Liliana M Diez D.m.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 00680 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$88.07 typical visit price
range $56.86 – $172.44
Typical copayment $22.01 (range $14.21 – $43.11)
Most-billed visit code 99203
Established Patient
$70.88 typical visit price
range $18.24 – $140.44
Typical copayment $17.72 (range $4.56 – $35.11)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Liliana Diez's NPI number?

The NPI number for Liliana Diez is 1801830435. It was assigned to this individual provider in the NPPES registry on June 15, 2006.

Where is Liliana Diez located?

Liliana Diez practices at #21 Dr. Nelson Perea St., Mayaguez, PR 00680. The listed phone number is (787) 833-8741.

What is Liliana Diez's specialty?

The primary specialty registered for this NPI is Dentist, specializing in Periodontics, with taxonomy code 1223P0300X.

Is Liliana Diez enrolled in Medicare?

Yes. Liliana Diez is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Liliana Diez was last updated on July 13, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.