DR. ALEJANDRA VALENTINA DIAZ SIERRA MD
NPI 1457978512
Internal Medicine - Cardiovascular Disease in Chicago, IL

Q: What is Alejandra Diaz Sierra's NPI number?

The NPI number for Alejandra Diaz Sierra is 1457978512. It was assigned to this individual provider in the NPPES registry on July 6, 2020.

Q: What is Alejandra Diaz Sierra's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Active since July 06, 2020PECOS Enrolled

3134 N CLARK ST, CHICAGO, IL 60657(773) 880-9722 Get Directions Write a Review

NPPES record last updated: May 2, 2023. Verified against the NPPES registry weekly; last sync: August 23, 2026.

Record update history: May 2, 2023, Aug 6, 2020, Jul 6, 2020 (3 updates tracked since 2020).

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About Dr. Alejandra Valentina Diaz Sierra Md NPPES

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

DR. ALEJANDRA VALENTINA DIAZ SIERRA MD (NPI 1457978512) is an individual cardiovascular disease provider in Chicago, Illinois, licensed in Illinois (125.076003) and active in the NPI registry since July 2020. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1457978512

Entity TypeIndividualFemale

Primary Taxonomy207RC0000X

Provider Legal NameDR. ALEJANDRA VALENTINA DIAZ SIERRACredential: MD

Location Address3134 N CLARK STChicago, IL 60657-4414

Mailing Address836 West Wellington AveChicago, IL 60657 · (773) 296-5424

Phone(773) 880-9722

Sole ProprietorNo

Enumeration DateJuly 6, 2020

Last NPPES UpdateMay 2, 20233 updates tracked since enumeration

NPPES CertifiedMay 2, 2023

✔ NPI 1457978512 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RC0000X

License✔ Licensed in IL · 125.076003

Definition

An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.

Also ListedInternal MedicineTaxonomy 207R00000X · License 125.076003 (IL)

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X

3134 N CLARK ST, Chicago, IL 60657

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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. Alejandra Valentina Diaz Sierra Md 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 60657 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

$138.86 typical visit price

range $60.08 – $183.39

Typical copayment $34.71 (range $15.02 – $45.84)

Most-billed visit code 99204

Established Patient

$74.80 typical visit price

range $18.97 – $148.12

Typical copayment $18.70 (range $4.74 – $37.03)

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.

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.

DR. SORIN C DANCIU M.D.

Internal Medicine (Cardiovascular Disease)