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MR. JOHN POWELL WILLIAMS IV PA-C
NPI 1366009169
Physician Assistant in Knoxville, TN

Active since May 28, 2019PECOS EnrolledAccepts Medicare Assignment
200 FORT SANDERS W BLVD, BUILDING 1, SUITE 102, KNOXVILLE, TN 37922(865) 531-5350(865) 374-2125 Get Directions Write a Review

NPPES record last updated: November 19, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Nov 19, 2025, Nov 16, 2025, Jul 5, 2023 and 3 more (6 updates tracked since 2019).

About Mr. John Powell Williams Iv Pa-c NPPES

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

MR. JOHN POWELL WILLIAMS IV PA-C (NPI 1366009169) is an individual physician assistant in Knoxville, Tennessee and active in the NPI registry since May 2019. He is enrolled in Medicare PECOS, is affiliated with Fort Sanders Regional Medical Center, and is a graduate of Other (2019).

NPPES Registry Identity

NPI1366009169
Entity TypeIndividualMale
Primary Taxonomy363A00000X
Provider Legal NameMR. JOHN POWELL WILLIAMS IVCredential: PA-C
Location Address200 FORT SANDERS W BLVD, BUILDING 1, SUITE 102Knoxville, TN 37922
Mailing Address200 Fort Sanders W Blvd, Building 1, Suite 102Knoxville, TN 37922 · (865) 531-5350 · Fax (865) 374-2125
Phone(865) 531-5350
Fax(865) 374-2125
Sole ProprietorYes
Medical School CMSOtherGraduated 2019
Enumeration DateMay 28, 2019
Last NPPES UpdateNovember 19, 20256 updates tracked since enumeration
NPPES CertifiedNovember 19, 2025
✔ NPI 1366009169 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363A00000X
Definition
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
200 FORT SANDERS W BLVD, Knoxville, TN 37922
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Other Identifiers 2

MedicaidQ053289TN
Other1162330National Commission On Certification Of Physician Assistants

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arkansas Health & Wellness, Ambetter from Home State Health, Ambetter from Magnolia Health and more.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

Mr. John Powell Williams Iv Pa-c 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 ID4880027671
PECOS Enrollment IDI20191210000221
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.

Areas of Expertise CMS Part B claims 3

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
115 services79 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
68 services66 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
58 services57 patients

Hospital Affiliations CMS Care Compare

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

Fort Sanders Regional Medical Center

Acute Care Hospitals · Knoxville, TN
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number440125
Location1901 W Clinch AveKnoxville, TN 37916 · Knox County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 37922 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
$81.53 typical visit price
range $52.64 – $160.89
Typical copayment $20.38 (range $13.16 – $40.22)
Most-billed visit code 99203
Established Patient
$66.01 typical visit price
range $16.72 – $131.41
Typical copayment $16.50 (range $4.18 – $32.85)
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.

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 John Williams's NPI number?

The NPI number for John Williams is 1366009169. It was assigned to this individual provider in the NPPES registry on May 28, 2019.

Where is John Williams located?

John Williams practices at 200 Fort Sanders W Blvd Building 1, Suite 102, Knoxville, TN 37922. The listed phone number is (865) 531-5350.

What is John Williams's specialty?

The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.

Is John Williams enrolled in Medicare?

Yes. John 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 John Williams accept?

Health plans from Ambetter from Arkansas Health & Wellness, Ambetter from Home State Health, Ambetter from Magnolia Health, Ambetter of Alabama and Ambetter of North Carolina and 2 other insurers list John 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 John Williams affiliated with any hospitals?

According to CMS data, John Williams is affiliated with Fort Sanders Regional Medical Center.

When was this NPI record last updated?

The NPPES record for John Williams was last updated on November 19, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.