LYNELL WILLIAMS MD
NPI 1164662128
Anesthesiology - Critical Care Medicine in Oakland, CA
About Lynell Williams Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
LYNELL WILLIAMS MD (NPI 1164662128) is an individual critical care medicine provider in Oakland, California, licensed in California (982903) and active in the NPI registry since March 2009. He is enrolled in Medicare PECOS, maintains a secondary practice location in Detroit, and is a graduate of Other (2008).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 1
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
Lynell Williams Md 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 Reassignments
9Medicare enrollment records show Lynell Williams reassigns Medicare billing to 9 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Walnut Creek, CA 94598
- Reassigned Medicare billing, California enrollment
- 833 clinicians in this Medicare group
San Ramon, CA 94583
- Reassigned Medicare billing, California enrollment
- 176 clinicians in this Medicare group
French Camp, CA 95231
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: Anesthesia Services Of San Joaquin PC
- 217 clinicians in this Medicare group
Davis, CA 95616
- Reassigned Medicare billing, California enrollment
- 2,570 clinicians in this Medicare group
Clearlake, CA 95422
- Reassigned Medicare billing, California enrollment
- 10 clinicians in this Medicare group
Roseville, CA 95661
- Reassigned Medicare billing, California enrollment
- 48 clinicians in this Medicare group
Fresno, CA 93720
- Reassigned Medicare billing, California enrollment
- 293 clinicians in this Medicare group
Duarte, CA 91010
- Reassigned Medicare billing, California enrollment
- 1,335 clinicians in this Medicare group
San Bernardino, CA 92404
- Reassigned Medicare billing, California enrollment
- 270 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.
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.
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 Lynell Williams's NPI number?
The NPI number for Lynell Williams is 1164662128. It was assigned to this individual provider in the NPPES registry on March 3, 2009.
Where is Lynell Williams located?
Lynell Williams practices at 350 Hawthorne Ave Rm 2346, Oakland, CA 94609. The listed phone number is (510) 869-6883.
What is Lynell Williams's specialty?
The primary specialty registered for this NPI is Anesthesiology, specializing in Critical Care Medicine, with taxonomy code 207LC0200X.
Is Lynell Williams enrolled in Medicare?
Yes. Lynell 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 organizations bill Medicare for Lynell Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Lynell Williams reassigns Medicare benefits to 9 organizations: Cep America - Anesthesia, PC (Walnut Creek, CA), Premier Anesthesia Of California, PC (San Ramon, CA), Anesthesia Services Of San Joaquin, P.C. (French Camp, CA), Regents Of The Univ Of Ca (Davis, CA), Medical Specialists Associates PC (Clearlake, CA) and 4 more organizations, listed in the Medicare section above. Each 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 Lynell 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 Lynell Williams was last updated on November 8, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Lynell Williams, MD · NPI 1164662128
Critical Care Medicine physician in Oakland, California. Individual provider, active in the CMS NPPES registry since March 3, 2009.
## Identity
- **NPI:** 1164662128 (Entity type: Individual)
- **Enumerated:** March 3, 2009
- **Primary specialty:** Anesthesiology - Critical Care Medicine · taxonomy 207LC0200X
- **State license:** 982903 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 350 HAWTHORNE AVE RM 2346, Oakland, CA 94609
- **Phone:** (510) 869-6883 · **Fax:** (510) 869-6888
## 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:** 9 organizations under Medicare reassignment (form CMS-855R): Cep America - Anesthesia, PC (NPI 1790401438, Walnut Creek, CA); Premier Anesthesia Of California, PC (NPI 1770691859, San Ramon, CA); Anesthesia Services Of San Joaquin, P.C. (NPI 1366778227, French Camp, CA); Regents Of The Univ Of Ca (NPI 1053304071, Davis, CA); Medical Specialists Associates PC (NPI 1326404948, Clearlake, CA); and 4 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2008
## Record status
- **NPPES last updated:** November 8, 2019
- **Other identifiers:** Other A131010 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1164662128) · Data from the CMS NPPES public registry.