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WILLIAM ANTHONY MAY MD
NPI 1790884898
Pediatrics - Pediatric Hematology-Oncology in Los Angeles, CA

Active since September 22, 2006PECOS Enrolled
4650 W SUNSET BLVD, LOS ANGELES, CA 90027(323) 669-2121(323) 660-7128 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About William Anthony May Md NPPES

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

WILLIAM ANTHONY MAY MD (NPI 1790884898) is an individual pediatric hematology-oncology provider in Los Angeles, California, licensed in California (G61264) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1790884898
Entity TypeIndividualMale
Primary Taxonomy2080P0207X
Provider Legal NameWILLIAM ANTHONY MAYCredential: MD
Location Address4650 W SUNSET BLVDLos Angeles, CA 90027-6062
Mailing Address6430 W Sunset Blvd, Suite 600Los Angeles, CA 90028-7901 · (323) 669-2337 · Fax (323) 644-8488
Phone(323) 669-2121
Fax(323) 660-7128
Sole ProprietorNo
Enumeration DateSeptember 22, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1790884898 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Pediatric Hematology-OncologyAllopathic & Osteopathic Physicians
Taxonomy Code2080P0207X
License✔ Licensed in CA · G61264
Definition
A pediatrician trained in the combination of pediatrics, hematology and oncology to recognize and manage pediatric blood disorders and cancerous diseases.
4650 W SUNSET BLVD, Los Angeles, CA 90027
Open in Google Maps ↗

Other Identifiers 4

Medicare ID-Type UnspecifiedWG61264CCA
Medicare UPINF43377CA
Medicaid00G612640CA
Other00G612640 G15CA · Cal Optima

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

William Anthony May 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.

Medicare Billing Reassignment

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

Children's Hospital Los Angeles Medical Group, Inc.
Same address
Multi-Specialty
4650 SUNSET BLVD
Los Angeles, CA 90027
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: Childrens Hospital Los Angeles Medical Group Inc
  • 1,281 clinicians in this Medicare group
NPI 1265530653 (323) 361-2337

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

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. MARK HENDRIK CORDEN M.D.
Pediatrics
4650 W SUNSET BLVD
LOS ANGELES, CA 90027
Los Angeles County (323) 361-8893
MS. ROBERTA MIYEKO KATO MD
Pediatrics (Pediatric Pulmonology)
4650 W SUNSET BLVD
LOS ANGELES, CA 90027
Los Angeles County (323) 361-2101
CHILDREN'S HOSPITAL LOS ANGELES
General Acute Care Hospital (Children)
4650 W SUNSET BLVD
LOS ANGELES, CA 90027
Los Angeles County (323) 361-3644
JESSICA ELIZABETH GREIM DPT, PT
Physical Therapist (Pediatrics)
4650 W SUNSET BLVD
LOS ANGELES, CA 90027
Los Angeles County (310) 361-2118
MOLLY CEVASCO PH.D., BCBA
Psychologist (Clinical Child & Adolescent)
4650 W SUNSET BLVD, MS #53
LOS ANGELES, CA 90027
Los Angeles County (323) 361-3849
GINNY KIM THAN NP
Nurse Practitioner (Pediatrics)
4650 W SUNSET BLVD, MS #81
LOS ANGELES, CA 90027
Los Angeles County (323) 361-3033
DOUGLAS SHAPIRO MD
Pediatrics (Pediatric Emergency Medicine)
4650 W SUNSET BLVD
LOS ANGELES, CA 90027
Los Angeles County (323) 660-2450
ALEXANDRA LYNN JOSTES MD
Student in an Organized Health Care Education/Training Program
4650 W SUNSET BLVD
LOS ANGELES, CA 90027
Los Angeles County (323) 361-2122

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 May's NPI number?

The NPI number for William May is 1790884898. It was assigned to this individual provider in the NPPES registry on September 22, 2006.

Where is William May located?

William May practices at 4650 W Sunset Blvd, Los Angeles, CA 90027. The listed phone number is (323) 669-2121.

What is William May's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Hematology-Oncology, with taxonomy code 2080P0207X.

Is William May enrolled in Medicare?

Yes. William May is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for William May's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William May reassigns Medicare benefits to Children's Hospital Los Angeles Medical Group, Inc. (Los Angeles, 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 May'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 May was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.