1. Home
  2. Directory
  3. West Virginia
  4. Charleston
  5. Internal Medicine
  6. NPI Profile

DR. THOMAS WILLIAM KNOWLES DO
NPI 1497490304
Internal Medicine in Charleston, WV

Active since May 04, 2022PECOS EnrolledAccepts Medicare Assignment
501 MORRIS ST, CHARLESTON, WV 25301(304) 388-5432 Get Directions Write a Review

NPPES record last updated: May 27, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: May 27, 2026, Apr 8, 2026, May 4, 2022 (3 updates tracked since 2022).

About Dr. Thomas William Knowles Do NPPES

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

DR. THOMAS WILLIAM KNOWLES DO (NPI 1497490304) is an individual internal medicine provider in Charleston, West Virginia, licensed in West Virginia (4950) and active in the NPI registry since May 2022. He is enrolled in Medicare PECOS and is a graduate of West Virginia School Of Osteopathic Medicine (2021).

NPPES Registry Identity

NPI1497490304
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. THOMAS WILLIAM KNOWLESCredential: DO
Location Address501 MORRIS STCharleston, WV 25301-1326
Mailing Address3100 Maccorkle Ave Se Ste B-16Charleston, WV 25304-1223
Phone(304) 388-5432
Sole ProprietorNo
Medical School CMSWest Virginia School Of Osteopathic MedicineGraduated 2021
Enumeration DateMay 4, 2022
Last NPPES UpdateMay 27, 20263 updates tracked since enumeration
NPPES CertifiedMay 27, 2026
✔ NPI 1497490304 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in WV · 4950
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
501 MORRIS ST, Charleston, WV 25301
Open in Google Maps ↗

Other Identifiers 1

Medicaid1497490304WV

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. Thomas William Knowles Do 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 ID8628540994
PECOS Enrollment IDI20260617003369
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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 25301 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
$124.46 typical visit price
range $53.20 – $164.59
Typical copayment $31.11 (range $13.30 – $41.14)
Most-billed visit code 99204
Established Patient
$94.81 typical visit price
range $16.47 – $133.29
Typical copayment $23.70 (range $4.11 – $33.32)
Most-billed visit code 99214
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.

SANDRA R MILES CRNA, RN, BSN
Nurse Anesthetist, Certified Registered
501 MORRIS ST
CHARLESTON, WV 25301
Kanawha County (304) 388-5432
RAMON S LANSANG JR. MD
Rehabilitation Practitioner
501 MORRIS ST, CAMC GENERAL HOSPITAL
CHARLESTON, WV 25301
Kanawha County (304) 388-6301
DR. HUNTER NIELSEN DO
Emergency Medicine
501 MORRIS ST
CHARLESTON, WV 25301
Kanawha County (304) 388-5432
EDWARD ANDREW WOODS MD
Physical Medicine & Rehabilitation
501 MORRIS ST
CHARLESTON, WV 25301
Kanawha County (304) 388-6301
KELLY D WAYMAN CRNA
Nurse Anesthetist, Certified Registered
501 MORRIS ST
CHARLESTON, WV 25301
Kanawha County (304) 647-6006
BRETT PAUL ZAVADIL PA-C
Physician Assistant (Medical)
501 MORRIS ST
CHARLESTON, WV 25301
Kanawha County (304) 388-5432
MRS. MARY CATHERINE MARSH FNP-BC
Nurse Practitioner (Family)
501 MORRIS ST, CHARLESTON AREA MEDICAL CENTER, INC.
CHARLESTON, WV 25301
Kanawha County (304) 388-6140
ROGER TAYLOR DO
Emergency Medicine
501 MORRIS ST
CHARLESTON, WV 25301
Kanawha County (304) 647-6006

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 Thomas Knowles's NPI number?

The NPI number for Thomas Knowles is 1497490304. It was assigned to this individual provider in the NPPES registry on May 4, 2022.

Where is Thomas Knowles located?

Thomas Knowles practices at 501 Morris St, Charleston, WV 25301. The listed phone number is (304) 388-5432.

What is Thomas Knowles's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Thomas Knowles enrolled in Medicare?

Yes. Thomas Knowles 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.

When was this NPI record last updated?

The NPPES record for Thomas Knowles was last updated on May 27, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.