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WILLIAM KENNETH HALLIDAY M.D.
NPI 1013021708
Internal Medicine - Cardiovascular Disease in Montebello, CA

Active since August 18, 2006PECOS EnrolledAccepts Medicare Assignment
2444 W BEVERLY BLVD, MONTEBELLO, CA 90640(323) 201-4130(323) 201-4134 Get Directions Write a Review

NPPES record last updated: August 29, 2019. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About William Kenneth Halliday M.d. NPPES

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

WILLIAM KENNETH HALLIDAY M.D. (NPI 1013021708) is an individual cardiovascular disease provider in Montebello, California, licensed in California (A23526) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1968).

NPPES Registry Identity

NPI1013021708
Entity TypeIndividualMale
Primary Taxonomy207RC0000X
Provider Legal NameWILLIAM KENNETH HALLIDAYCredential: M.D.
Location Address2444 W BEVERLY BLVDMontebello, CA 90640-2306
Mailing Address12900 Park Plaza Dr Ste 150Cerritos, CA 90703-9329 · (562) 977-4674 · Fax (562) 741-4479
Phone(323) 201-4130
Fax(323) 201-4134
Sole ProprietorYes
Medical School CMSOtherGraduated 1968
Enumeration DateAugust 18, 2006
Last NPPES UpdateAugust 29, 2019
✔ NPI 1013021708 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RC0000X
License✔ Licensed in CA · A23526
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.
2444 W BEVERLY BLVD, Montebello, CA 90640
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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 and accepts Medicare assignment

William Kenneth Halliday M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID4587675368
PECOS Enrollment IDI20060508000705
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 William Halliday reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Albion Medical Partners Of California West P C
11 mi
Internal Medicine
12900 PARK PLAZA DR, STE 700, MS-7110
Cerritos, CA 90703
  • Reassigned Medicare billing, California enrollment
  • 235 clinicians in this Medicare group
NPI 1073110607 (562) 622-2800

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 90640 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
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$77.96 typical visit price
range $20.84 – $153.61
Typical copayment $19.49 (range $5.21 – $38.40)
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 6

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

LILIANE IDYLLE D.O.
Internal Medicine
2444 W BEVERLY BLVD
MONTEBELLO, CA 90640
Los Angeles County (562) 333-8288
ESMERALDA GALAVIZ MS, RDN
Dietitian, Registered
2444 W BEVERLY BLVD
MONTEBELLO, CA 90640
Los Angeles County (323) 201-4130
HEAIN AUNG FNP-C
Nurse Practitioner
2444 W BEVERLY BLVD
MONTEBELLO, CA 90640
Los Angeles County (323) 201-4130
BLANCA TORRES N.P.
Nurse Practitioner (Family)
2444 W BEVERLY BLVD
MONTEBELLO, CA 90640
Los Angeles County (323) 201-4130
MISS CATHY LIANG FNP
Nurse Practitioner (Family)
2444 W BEVERLY BLVD
MONTEBELLO, CA 90640
Los Angeles County (323) 201-4130
SIMON WONG
Physician Assistant
2444 W BEVERLY BLVD
MONTEBELLO, CA 90640
Los Angeles County (323) 201-4130

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 William Halliday's NPI number?

The NPI number for William Halliday is 1013021708. It was assigned to this individual provider in the NPPES registry on August 18, 2006.

Where is William Halliday located?

William Halliday practices at 2444 W Beverly Blvd, Montebello, CA 90640. The listed phone number is (323) 201-4130.

What is William Halliday's specialty?

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

Is William Halliday enrolled in Medicare?

Yes. William Halliday is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for William Halliday's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Halliday reassigns Medicare benefits to Albion Medical Partners Of California West P C (Cerritos, 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 William Halliday'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 William Halliday was last updated on August 29, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.