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DR. WILLIAM J LYONS M.D.
NPI 1639139595
Specialist in Long Beach, CA

Active since March 24, 2006PECOS Enrolled
76.74/100
CMS Quality Rating
2653 ELM AVE, STE 300, LONG BEACH, CA 90806(562) 595-7335(562) 427-3375 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. William J Lyons M.d. NPPES

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

DR. WILLIAM J LYONS M.D. (NPI 1639139595) is an individual specialist in Long Beach, California, licensed in California (G17266) and active in the NPI registry since March 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1639139595
Entity TypeIndividualMale
Primary Taxonomy174400000X
Provider Legal NameDR. WILLIAM J LYONSCredential: M.D.
Location Address2653 ELM AVE, STE 300Long Beach, CA 90806-1652
Mailing Address2650 Elm Ave, Ste 301Long Beach, CA 90806-1651 · (562) 595-7335 · Fax (562) 988-1655
Phone(562) 595-7335
Fax(562) 427-3375
Sole ProprietorNo
Enumeration DateMarch 24, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1639139595 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpecialistOther Service Providers
Taxonomy Code174400000X
License✔ Licensed in CA · G17266
Definition
An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.
2653 ELM AVE, Long Beach, CA 90806
Open in Google Maps ↗

Other Identifiers 1

MedicaidGR0029650CA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. William J Lyons 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 William Lyons reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Memorialcare Medical Foundation
15 mi
Clinic/Center
17360 BROOKHURST ST
Fountain Valley, CA 92708
  • Reassigned Medicare billing, California enrollment
  • 948 clinicians in this Medicare group
NPI 1205167350 (877) 696-3622

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

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
20 services15 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
15 services13 patients

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

76.74/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality80.94
Promoting Interoperability78
Improvement Activities40
Cost55.12

Referred Medical Equipment & Supplies CMS DME claims

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Temozolomide, oral, 5 mg J8700
Treatment-Treatment - Miscellaneous · category RX000N
1 supplier18 claims2,745 services$0.21 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 9

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

TIFFANY GREEN NP-C
Nurse Practitioner (Family)
2653 ELM AVE, SUITE 300
LONG BEACH, CA 90806
Los Angeles County (562) 595-7335
MR. RAMESH PATEL MD
Pediatrics (Pediatric Hematology-Oncology)
2653 ELM AVE, #200
LONG BEACH, CA 90806
Los Angeles County (562) 728-5000
JOETTA DESWARTE WALLCE NP
Nurse Practitioner
2653 ELM AVE, SUITE 200
LONG BEACH, CA 90806
Los Angeles County (562) 728-5000
MS. SUSAN VERONICA SHANNON CRNP
Nurse Practitioner
2653 ELM AVE, SUITE 200
LONG BEACH, CA 90806
Los Angeles County (562) 728-5000
ONCOLOGY HEMATOLOGY CONSULTANTS MEDICAL GROUP, INC.
Specialist
2653 ELM AVE, SUITE 300
LONG BEACH, CA 90806
Los Angeles County (562) 595-7335
DAVID C SIMON MD
Pediatrics (Pediatric Hematology-Oncology)
2653 ELM AVE, SUITE 200
LONG BEACH, CA 90806
Los Angeles County (562) 492-1062
DR. CYNTHIA ANN FORSTHOFF M.D.
Specialist
2653 ELM AVE, STE 300
LONG BEACH, CA 90806
Los Angeles County (562) 595-7335
PEDIATRIC & ADOLESCENT HEMATOLOGY-ONCOLOGY ASSOCIATES
Specialist
2653 ELM AVE, SUITE 200
LONG BEACH, CA 90806
Los Angeles County (562) 492-1062

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 Lyons's NPI number?

The NPI number for William Lyons is 1639139595. It was assigned to this individual provider in the NPPES registry on March 24, 2006.

Where is William Lyons located?

William Lyons practices at 2653 Elm Ave Ste 300, Long Beach, CA 90806. The listed phone number is (562) 595-7335.

What is William Lyons's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Is William Lyons enrolled in Medicare?

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

Which organization bills Medicare for William Lyons's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Lyons reassigns Medicare benefits to Memorialcare Medical Foundation (Fountain Valley, 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 Lyons'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 Lyons was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months 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.