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WILFREDO ALEJO M.D.
NPI 1114990785
Pediatrics in Diamond Bar, CA

Active since February 13, 2006PECOS Enrolled
1514 VALLEY VISTA DR, DIAMOND BAR, CA 91765(909) 860-1144 Get Directions Write a Review

NPPES record last updated: October 14, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Oct 14, 2021, Oct 19, 2020, Sep 25, 2018 and 1 more (4 updates tracked since 2018).

About Wilfredo Alejo M.d. NPPES

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

WILFREDO ALEJO M.D. (NPI 1114990785) is an individual pediatrics provider in Diamond Bar, California, licensed in California (A52629) and active in the NPI registry since February 2006. He is enrolled in Medicare PECOS and maintains a secondary practice location in Covina.

NPPES Registry Identity

NPI1114990785
Entity TypeIndividualMale
Primary Taxonomy208000000X
Provider Legal NameWILFREDO ALEJOCredential: M.D.
Location Address1514 VALLEY VISTA DRDiamond Bar, CA 91765
Mailing Address1514 Valley Vista DrDiamond Bar, CA 91765-3929
Phone(909) 860-1144
Sole ProprietorNo
Enumeration DateFebruary 13, 2006
Last NPPES UpdateOctober 14, 20214 updates tracked since enumeration
NPPES CertifiedOctober 14, 2021
✔ NPI 1114990785 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in CA · A52629
Definition
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
1514 VALLEY VISTA DR, Diamond Bar, CA 91765
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Secondary Practice Location 1

Location 1420 W Rowland StCovina, CA 91723-2943 · Phone (626) 331-6411 · Fax (626) 251-1560

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Wilfredo Alejo 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.

Medicare Billing Reassignment

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

Providence Medical Foundation
Same address
General Practice
1514 VALLEY VISTA DR
Diamond Bar, CA 91765
  • Reassigned Medicare billing, California enrollment
  • 1,699 clinicians in this Medicare group
NPI 1285890624 (909) 860-1144

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 91765 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
$96.36 typical visit price
range $62.96 – $187.60
Typical copayment $24.09 (range $15.74 – $46.90)
Most-billed visit code 99203
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
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 17

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

AARON LIN D.O.
Family Medicine
1514 VALLEY VISTA DR, ST JUDE HERITAGE MEDICAL GROUP
DIAMOND BAR, CA 91765
Los Angeles County (909) 860-1144
KELI LAYTON-CUNNIGAN PA
Physician Assistant
1514 VALLEY VISTA DR
DIAMOND BAR, CA 91765
Los Angeles County (909) 860-1144
SAROM PYUN M.D.
Family Medicine
1514 VALLEY VISTA DR
DIAMOND BAR, CA 91765
Los Angeles County (909) 860-1144
DOUGLAS STARR MD
Family Medicine
1514 VALLEY VISTA DR
DIAMOND BAR, CA 91765
Los Angeles County (909) 860-1144
WILLIAM FENERTY
Family Medicine
1514 VALLEY VISTA DR
DIAMOND BAR, CA 91765
Los Angeles County (714) 449-4842
DENETTE MUNCHEL PA
Physician Assistant
1514 VALLEY VISTA DR
DIAMOND BAR, CA 91765
Los Angeles County (909) 860-1144
PROVIDENCE MEDICAL FOUNDATION
General Practice
1514 VALLEY VISTA DR
DIAMOND BAR, CA 91765
Los Angeles County (909) 860-1144
BRIAN KOFFMAN MD
Family Medicine
1514 VALLEY VISTA DR
DIAMOND BAR, CA 91765
Los Angeles County (909) 860-1144

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 Wilfredo Alejo's NPI number?

The NPI number for Wilfredo Alejo is 1114990785. It was assigned to this individual provider in the NPPES registry on February 13, 2006.

Where is Wilfredo Alejo located?

Wilfredo Alejo practices at 1514 Valley Vista Dr, Diamond Bar, CA 91765. The listed phone number is (909) 860-1144.

What is Wilfredo Alejo's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is Wilfredo Alejo enrolled in Medicare?

Yes. Wilfredo Alejo is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Wilfredo Alejo's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Wilfredo Alejo reassigns Medicare benefits to Providence Medical Foundation (Diamond Bar, CA). 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 Wilfredo Alejo'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 Wilfredo Alejo was last updated on October 14, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.