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DR. SETH WILLIAMS MD
NPI 1164006995
Psychiatry & Neurology - Psychiatry in Cleveland, OH

Active since May 07, 2021PECOS EnrolledAccepts Medicare Assignment
CLEVELAND CLINIC 9500 EUCLID AVENUE/NA-23, CLEVELAND, OH 44195(216) 444-2200 Get Directions Write a Review

NPPES record last updated: June 19, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jun 19, 2025, May 7, 2021 (2 updates tracked since 2021).

About Dr. Seth Williams Md NPPES

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

DR. SETH WILLIAMS MD (NPI 1164006995) is an individual psychiatry provider in Cleveland, Ohio, licensed in Ohio (35.148349) and active in the NPI registry since May 2021. He is enrolled in Medicare PECOS, is affiliated with Marymount Hospital, and maintains 4 additional practice locations.

NPPES Registry Identity

NPI1164006995
Entity TypeIndividualMale
Primary Taxonomy2084P0800X
Provider Legal NameDR. SETH WILLIAMSCredential: MD
Location AddressCLEVELAND CLINIC 9500 EUCLID AVENUE/NA-23Cleveland, OH 44195-0001
Mailing Address1111 Fairfield Ave Unit 213Cleveland, OH 44113-3637 · (903) 812-2435
Phone(216) 444-2200
Sole ProprietorYes
Medical School CMSUniversity Of Texas Medical Branch At GalvestonGraduated 2021
Enumeration DateMay 7, 2021
Last NPPES UpdateJune 19, 20252 updates tracked since enumeration
NPPES CertifiedJune 19, 2025
✔ NPI 1164006995 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0800X
License✔ Licensed in OH · 35.148349
Definition
A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.
CLEVELAND CLINIC 9500 EUCLID AVENUE/NA-23, Cleveland, OH 44195
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Secondary Practice Locations 4

Location 1Lakewood Family Health Center, 14601 Detroit AvenueLakewood, OH 44107 · Phone (216) 237-5500
Location 2South Pointe Hospital, 20000 Harvard RoadWarrensville Heights, OH 44122 · Phone (216) 491-6000
Location 3Fairview Hospital, 18101 Lorain AveCleveland, OH 44111 · Phone (216) 476-7000
Location 412300 McCracken RdGarfield Heights, OH 44125-2914 · Phone (216) 408-3615

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include CareSource, Oscar Insurance Corporation of Ohio.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Seth 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.

PECOS PAC ID8921407784
PECOS Enrollment IDI20250723004280
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.

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Marymount Hospital

Acute Care Hospitals · Garfield Heights, OH
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number360143
Location12300 Mccracken RoadGarfield Heights, OH 44125 · Cuyahoga County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 44195 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$166.65 typical visit price
range $54.34 – $166.65
Typical copayment $41.66 (range $13.58 – $41.66)
Most-billed visit code 99205
Established Patient
$68.07 typical visit price
range $17.10 – $135.40
Typical copayment $17.01 (range $4.27 – $33.85)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

DOMINIC SANDLER MD
Obstetrics & Gynecology
CLEVELAND CLINIC 9500 EUCLID AVENUE/NA-23
CLEVELAND, OH 44195
Cuyahoga County (216) 444-2200
ANDREW CONNER MD
Surgery
CLEVELAND CLINIC 9500 EUCLID AVENUE/NA-23
CLEVELAND, OH 44195
Cuyahoga County (216) 444-2200
SANGEETA SATISH
Student in an Organized Health Care Education/Training Program
CLEVELAND CLINIC 9500 EUCLID AVENUE/NA-23
CLEVELAND, OH 44195
Cuyahoga County (216) 444-2200
DR. TAREK TAHA MD
Internal Medicine
CLEVELAND CLINIC 9500 EUCLID AVENUE/NA-23
CLEVELAND, OH 44195
Cuyahoga County (216) 444-2200
JEAN BERESIAN MD, FASE
Anesthesiology
CLEVELAND CLINIC 9500 EUCLID AVENUE/NA-23
CLEVELAND, OH 44195
Cuyahoga County (216) 444-2200
DR. PETER FLYNN SARNACKI I DO
Psychiatry & Neurology (Neurology with Special Qualifications in Child Neurology)
CLEVELAND CLINIC 9500 EUCLID AVENUE/NA-23
CLEVELAND, OH 44195
Cuyahoga County (216) 444-2200
ANDREW DHAWAN MD
Psychiatry & Neurology (Neurology)
CLEVELAND CLINIC 9500 EUCLID AVENUE/NA-23
CLEVELAND, OH 44195
Cuyahoga County (216) 444-2200
DR. KAITLIN CHRISTINE PAYNE MD
Student in an Organized Health Care Education/Training Program
CLEVELAND CLINIC 9500 EUCLID AVENUE/NA-23
CLEVELAND, OH 44195
Cuyahoga County (216) 444-2200

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 Seth Williams's NPI number?

The NPI number for Seth Williams is 1164006995. It was assigned to this individual provider in the NPPES registry on May 7, 2021.

Where is Seth Williams located?

Seth Williams practices at Cleveland Clinic 9500 Euclid Avenue/Na-23, Cleveland, OH 44195. The listed phone number is (216) 444-2200.

What is Seth Williams's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Is Seth Williams enrolled in Medicare?

Yes. Seth 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.

What insurance does Seth Williams accept?

Health plans from CareSource and Oscar Insurance Corporation of Ohio list Seth Williams as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Seth Williams affiliated with any hospitals?

According to CMS data, Seth Williams is affiliated with Marymount Hospital.

When was this NPI record last updated?

The NPPES record for Seth Williams was last updated on June 19, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.