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ALEJANDRO VALLEJO DO
NPI 1356030167
Internal Medicine in Chicago, IL

Active since May 08, 2023PECOS Enrolled
1901 W HARRISON ST, CHICAGO, IL 60612(312) 864-6000 Get Directions Write a Review

NPPES record last updated: May 21, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: May 21, 2023, May 8, 2023 (2 updates tracked since 2023).

About Alejandro Vallejo Do NPPES

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

ALEJANDRO VALLEJO DO (NPI 1356030167) is an individual internal medicine provider in Chicago, Illinois, licensed in Illinois (125081894) and active in the NPI registry since May 2023. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1356030167
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameALEJANDRO VALLEJOCredential: DO
Location Address1901 W HARRISON STChicago, IL 60612-3714
Mailing Address1901 W Harrison StChicago, IL 60612-3714 · (312) 864-6000
Phone(312) 864-6000
Sole ProprietorNo
Enumeration DateMay 8, 2023
Last NPPES UpdateMay 21, 20232 updates tracked since enumeration
NPPES CertifiedMay 21, 2023
✔ NPI 1356030167 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in IL · 125081894
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.
1901 W HARRISON ST, Chicago, IL 60612
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Alejandro Vallejo Do 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.

Medicare Billing Reassignment

Medicare enrollment records show Alejandro Vallejo reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Cook County
Same address
Multi-Specialty
1901 W HARRISON ST
Chicago, IL 60612
  • Reassigned Medicare billing, Illinois enrollment
  • 1,047 clinicians in this Medicare group
NPI 1245350040 (312) 864-4649

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 60612 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
$105.70 typical visit price
range $18.97 – $148.12
Typical copayment $26.42 (range $4.74 – $37.03)
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.

JOHANNA WEFES-POTTER
Emergency Medicine
1901 W HARRISON ST
CHICAGO, IL 60612
Cook County (847) 843-2000
ARON BERHANU GUDETTA MD
Internal Medicine
1901 W HARRISON ST
CHICAGO, IL 60612
Cook County (312) 864-6000
DR. LIGAYA VILLAFRANCA MARASIGAN M.D.
Obstetrics & Gynecology (Gynecology)
1901 W HARRISON ST
CHICAG, IL 60612
Cook County (312) 864-5901
TIN TIN THOMAS M.D.
Internal Medicine
1901 W HARRISON ST
CHICAGO, IL 60612
Cook County (312) 864-6000
COOK COUNTY
Pharmacy (Clinic Pharmacy)
1901 W HARRISON ST
CHICAGO, IL 60612
Cook County (312) 864-6189
HELEN ELIZABETH STRAUS MD
Emergency Medicine
1901 W HARRISON ST
CHICAGO, IL 60612
Cook County (312) 864-0060
MR. GLEN DERRICK TRAMMELL PA-C
Physician Assistant
1901 W HARRISON ST
CHICAGO, IL 60612
Cook County (773) 869-7488
JOHN H STROGER, JR. HOSPITAL OF COOK COUNTY
General Acute Care Hospital
1901 W HARRISON ST
CHICAGO, IL 60612
Cook County (773) 319-2085

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 Alejandro Vallejo's NPI number?

The NPI number for Alejandro Vallejo is 1356030167. It was assigned to this individual provider in the NPPES registry on May 8, 2023.

Where is Alejandro Vallejo located?

Alejandro Vallejo practices at 1901 W Harrison St, Chicago, IL 60612. The listed phone number is (312) 864-6000.

What is Alejandro Vallejo's specialty?

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

Is Alejandro Vallejo enrolled in Medicare?

Yes. Alejandro Vallejo is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Alejandro Vallejo's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Alejandro Vallejo reassigns Medicare benefits to Cook County (Chicago, IL). 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 Alejandro Vallejo'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 Alejandro Vallejo was last updated on May 21, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years 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.