NELSON A ALVAREZ CARDIN MD
NPI 1275199523
Internal Medicine in San Juan, PR

Q: What is Nelson Alvarez Cardin's NPI number?

The NPI number for Nelson Alvarez Cardin is 1275199523. It was assigned to this individual provider in the NPPES registry on May 13, 2019.

Q: What is Nelson Alvarez Cardin's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Active since May 13, 2019PECOS Enrolled

10 CALLE CASIA, SAN JUAN, PR 00921(787) 641-7582 Get Directions Write a Review

NPPES record last updated: October 10, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Oct 10, 2025, Aug 2, 2022, May 13, 2019 (3 updates tracked since 2019).

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About Nelson A Alvarez Cardin Md NPPES

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

NELSON A ALVAREZ CARDIN MD (NPI 1275199523) is an individual internal medicine provider in San Juan, Puerto Rico, licensed in Puerto Rico (21477) and active in the NPI registry since May 2019. He is enrolled in Medicare PECOS, maintains a secondary practice location in Juncos, and is a graduate of Other (2018).

NPPES Registry Identity

NPI1275199523

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameNELSON A ALVAREZ CARDINCredential: MD

Location Address10 CALLE CASIASan Juan, PR 00921-3201

Mailing AddressA26 Calle 3, Urb Santa JuanaCaguas, PR 00725-2008 · (787) 204-9771

Phone(787) 641-7582

Sole ProprietorYes

Medical School CMSOtherGraduated 2018

Enumeration DateMay 13, 2019

Last NPPES UpdateOctober 10, 20253 updates tracked since enumeration

NPPES CertifiedOctober 10, 2025

✔ NPI 1275199523 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in PR · 21477

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Also ListedHospitalistTaxonomy 208M00000X · License 21477 (PR)

Secondary Practice Location 1

Location 1R006 Calle Domingo FidalgoJuncos, PR 00777 · Phone (787) 204-9771

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Nelson A Alvarez Cardin Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID42708638

PECOS Enrollment IDI20251024001574

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.

Medicare Billing Reassignment

Medicare enrollment records show Nelson Alvarez Cardin reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Nacmed LLC

Internal Medicine

R006 CALLE DOMINGO FIDALGO
Juncos, PR 00777

Reassigned Medicare billing, Puerto Rico enrollment

NPI 1013882034 (787) 204-9771

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 00921 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

$130.65 typical visit price

range $56.86 – $172.44

Typical copayment $32.66 (range $14.21 – $43.11)

Most-billed visit code 99204

Established Patient

$100.24 typical visit price

range $18.24 – $140.44

Typical copayment $25.06 (range $4.56 – $35.11)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

VIRIANA DIEZ GUTIERREZ M.D.

Psychiatry & Neurology (Psychiatry)

10 CALLE CASIA
SAN JUAN, PR 00921

San Juan Municipio (787) 641-3659

FELIX OMAR GARCIA PHARMACY TECHNICIAN

Pharmacy Technician

10 CALLE CASIA
SAN JUAN, PR 00921

San Juan Municipio (787) 641-7582

JOAN DIAZ RD

Dietitian, Registered

10 CALLE CASIA
SAN JUAN, PR 00921

San Juan Municipio (787) 641-7582

VERONICA LUCIANO RD

Dietitian, Registered

10 CALLE CASIA
SAN JUAN, PR 00921

San Juan Municipio (787) 641-7582

MR. LIZANDRO CARRASQUILLO MED,RRT

Respiratory Therapist, Registered

10 CALLE CASIA, SAN JUAN
SAN JUAN, PR 00921

San Juan Municipio (787) 641-7582

SANDRA ESTHER RIVERA M.D.

Psychiatry & Neurology (Psychiatry)

10 CALLE CASIA
SAN JUAN, PR 00921

San Juan Municipio (787) 641-7582

DR. KAREN MALARET PSY.D.

Psychologist (Clinical)

10 CALLE CASIA, VA CARIBBEAN HEALTHCARE SYSTEM
SAN JUAN, PR 00921

San Juan Municipio (787) 641-7582

DIEGO IGNACIO ORTIZ

Internal Medicine

10 CALLE CASIA
SAN JUAN, PR 00921

San Juan Municipio (787) 641-7582

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 Nelson Alvarez Cardin's NPI number?

The NPI number for Nelson Alvarez Cardin is 1275199523. It was assigned to this individual provider in the NPPES registry on May 13, 2019.

Where is Nelson Alvarez Cardin located?

Nelson Alvarez Cardin practices at 10 Calle Casia, San Juan, PR 00921. The listed phone number is (787) 641-7582.

What is Nelson Alvarez Cardin's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Nelson Alvarez Cardin enrolled in Medicare?

Yes. Nelson Alvarez Cardin is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Nelson Alvarez Cardin's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Nelson Alvarez Cardin reassigns Medicare benefits to Nacmed LLC (Juncos, PR). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Nelson Alvarez Cardin's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Nelson Alvarez Cardin was last updated on October 10, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.