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CASSANDRA LINNEA WILLIAMS DO
NPI 1487396511
Anesthesiology in Warrensville Heights, OH

Active since April 09, 2022PECOS Enrolled
20000 HARVARD AVE, WARRENSVILLE HEIGHTS, OH 44122(216) 491-6000 Get Directions Write a Review

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

Record update history: Apr 13, 2022, Apr 9, 2022 (2 updates tracked since 2022).

About Cassandra Linnea Williams Do NPPES

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

CASSANDRA LINNEA WILLIAMS DO (NPI 1487396511) is an individual anesthesiology provider in Warrensville Heights, Ohio, licensed in Ohio (34.018773) and active in the NPI registry since April 2022. She is enrolled in Medicare PECOS and maintains 4 additional practice locations.

NPPES Registry Identity

NPI1487396511
Entity TypeIndividualFemale
Primary Taxonomy207L00000X
Provider Legal NameCASSANDRA LINNEA WILLIAMSCredential: DO
Location Address20000 HARVARD AVEWarrensville Heights, OH 44122-6805
Mailing Address33300 Cleveland Clinic BlvdAvon, OH 44011-1172
Phone(216) 491-6000
Sole ProprietorYes
Enumeration DateApril 9, 2022
Last NPPES UpdateJune 18, 20262 updates tracked since enumeration
NPPES CertifiedJune 18, 2026
✔ NPI 1487396511 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in OH · 34.018773
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
20000 HARVARD AVE, Warrensville Heights, OH 44122
Open in Google Maps ↗

Secondary Practice Locations 4

Location 19500 Euclid Ave # Na-23Cleveland, OH 44195-6805 · Phone (216) 444-2200
Location 218101 Lorain AveCleveland, OH 44111-5612 · Phone (216) 476-7000
Location 314601 Detroit AveLakewood, OH 44107-4205 · Phone (216) 237-5500
Location 433300 Cleveland Clinic BlvdAvon, OH 44011-1172 · Phone (440) 695-5000

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Cassandra Linnea Williams Do 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 Cassandra Williams reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

The Cleveland Clinic Foundation
5.8 mi
General Acute Care Hospital
9500 EUCLID AVE
Cleveland, OH 44195
  • Reassigned Medicare billing, Ohio enrollment
  • 7,608 clinicians in this Medicare group
NPI 1679525919 (216) 444-2200

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.

AMANDA MOWRER FNP-C
Nurse Practitioner (Family)
20000 HARVARD AVE
WARRENSVILLE HEIGHTS, OH 44122
Cuyahoga County (216) 491-6000
LAUREN SARAH MUNOZ TREMBLAY DO
Student in an Organized Health Care Education/Training Program
20000 HARVARD AVE
WARRENSVILLE HEIGHTS, OH 44122
Cuyahoga County (216) 491-6000
ALLISON MARKERT M.A. CCC/SLP
Speech-Language Pathologist
20000 HARVARD AVE
WARRENSVILLE HEIGHTS, OH 44122
Cuyahoga County (216) 491-7390
DR. NOAH ROBERT BELKHAYAT DO
Student in an Organized Health Care Education/Training Program
20000 HARVARD AVE
WARRENSVILLE HEIGHTS, OH 44122
Cuyahoga County (216) 491-6000
AMMAR KRSO DO
Student in an Organized Health Care Education/Training Program
20000 HARVARD AVE
WARRENSVILLE HEIGHTS, OH 44122
Cuyahoga County (216) 491-6000
DENISE LYNN ROBISON APRN CNP
Nurse Practitioner
20000 HARVARD AVE
WARRENSVILLE HEIGHTS, OH 44122
Cuyahoga County (216) 491-6000
TAYLOR JORDAN STANG DO
Internal Medicine
20000 HARVARD AVE
WARRENSVILLE HEIGHTS, OH 44122
Cuyahoga County (216) 491-6000
TANYA GUPTA
Student in an Organized Health Care Education/Training Program
20000 HARVARD AVE
WARRENSVILLE HEIGHTS, OH 44122
Cuyahoga County (216) 491-6000

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 Cassandra Williams's NPI number?

The NPI number for Cassandra Williams is 1487396511. It was assigned to this individual provider in the NPPES registry on April 9, 2022.

Where is Cassandra Williams located?

Cassandra Williams practices at 20000 Harvard Ave, Warrensville Heights, OH 44122. The listed phone number is (216) 491-6000.

What is Cassandra Williams's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is Cassandra Williams enrolled in Medicare?

Yes. Cassandra Williams is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Cassandra Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Cassandra Williams reassigns Medicare benefits to The Cleveland Clinic Foundation (Cleveland, OH). 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 Cassandra 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 Cassandra Williams was last updated on June 18, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.