DR. LANCELOT L WILLIAMS M.D.
NPI 1053372763
Anesthesiology in Whittier, CA
About Dr. Lancelot L Williams M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. LANCELOT L WILLIAMS M.D. (NPI 1053372763) is an individual anesthesiology provider in Whittier, California, licensed in California (A46503) and active in the NPI registry since March 2006. He is enrolled in Medicare PECOS and is a graduate of Boston University School Of Medicine (1988).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 5
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
Dr. Lancelot L Williams 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.
Medicare Billing Reassignment
Medicare enrollment records show Lancelot Williams reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Whittier, CA 90606
- Reassigned Medicare billing, California enrollment
- 840 clinicians in this Medicare group
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.
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.
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.
WHITTIER, CA 90602
WHITTIER, CA 90602
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 Lancelot Williams's NPI number?
The NPI number for Lancelot Williams is 1053372763. It was assigned to this individual provider in the NPPES registry on March 31, 2006.
Where is Lancelot Williams located?
Lancelot Williams practices at 12401 Washington Blvd, Whittier, CA 90602. The listed phone number is (562) 698-0811.
What is Lancelot Williams's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Lancelot Williams enrolled in Medicare?
Yes. Lancelot Williams 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 Lancelot Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Lancelot Williams reassigns Medicare benefits to Pih Health Physicians (Whittier, 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 Lancelot Williams'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 Lancelot Williams was last updated on August 21, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.
# Dr. Lancelot L Williams, M.D. · NPI 1053372763
Anesthesiology physician in Whittier, California. Individual provider, active in the CMS NPPES registry since March 31, 2006.
## Identity
- **NPI:** 1053372763 (Entity type: Individual)
- **Enumerated:** March 31, 2006
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** A46503 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 12401 WASHINGTON BLVD, Whittier, CA 90602-1006
- **Phone:** (562) 698-0811
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Pih Health Physicians (NPI 1376793695, Whittier, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Boston University School Of Medicine, class of 1988
## Record status
- **NPPES last updated:** August 21, 2014
- **Other identifiers:** Medicaid 00A465030 (CA); Medicare UPIN F64400 (CA); Medicare PIN 050077927 (CA); and 2 more
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Source: [NPI Profile](https://npiprofile.com/npi/1053372763) · Data from the CMS NPPES public registry.