1. Home
  2. Directory
  3. Tennessee
  4. Johnson City
  5. Emergency Medicine
  6. NPI Profile

DR. CLIFFORD G WILLIAMSON MD
NPI 1154562304
Emergency Medicine in Johnson City, TN

Active since March 18, 2009PECOS EnrolledAccepts Medicare Assignment
325 N STATE OF FRANKLIN RD, JOHNSON CITY, TN 37604(423) 439-6283 Get Directions Write a Review

NPPES record last updated: April 29, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Clifford G Williamson Md NPPES

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

DR. CLIFFORD G WILLIAMSON MD (NPI 1154562304) is an individual emergency medicine provider in Johnson City, Tennessee, licensed in Tennessee (52142) and active in the NPI registry since March 2009. He is enrolled in Medicare PECOS, is affiliated with Wellmont Bristol Regional Medical Center, and is a graduate of East Tennessee State University Quillen College Of Medicine (2009).

NPPES Registry Identity

NPI1154562304
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameDR. CLIFFORD G WILLIAMSONCredential: MD
Location Address325 N STATE OF FRANKLIN RDJohnson City, TN 37604-6062
Mailing Address325 N State Of Franklin RdJohnson City, TN 37604-6062 · (423) 439-6283
Phone(423) 439-6283
Sole ProprietorNo
Medical School CMSEast Tennessee State University Quillen College Of MedicineGraduated 2009
Enumeration DateMarch 18, 2009
Last NPPES UpdateApril 29, 2025
NPPES CertifiedApril 29, 2025
✔ NPI 1154562304 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
Licenses✔ Licensed in TN · 52142✔ Licensed in VA · 0101282637
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
325 N STATE OF FRANKLIN RD, Johnson City, TN 37604
Open in Google Maps ↗

Other Identifiers 1

Medicaid1154562304VA

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Insurance Company.Insurance ›

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

Dr. Clifford G Williamson 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 ID9638495963
PECOS Enrollment IDI20150304002320, I20220304001553
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 Reassignments

5

Medicare enrollment records show Clifford Williamson reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Tri-Cities Regional Emergency Physicians, PC
0.3 mi
Emergency Medicine
400 N STATE OF FRANKLIN RD
Johnson City, TN 37604
  • Reassigned Medicare billing, Tennessee enrollment
  • 284 clinicians in this Medicare group
NPI 1063950046 (423) 431-6111
Ipc Pac Healthcare Services Of Tennessee PC
21 mi
Internal Medicine
1 MEDICAL PARK BLVD
Bristol, TN 37620
  • Reassigned Medicare billing, Tennessee enrollment
  • 230 clinicians in this Medicare group
NPI 1104277656 (423) 844-1121
Southeastern Physician Services PC
106 mi
Hospitalist
990 OAK RIDGE TPKE
Oak Ridge, TN 37830
  • Reassigned Medicare billing, Tennessee and Virginia enrollments
  • 1,085 clinicians in this Medicare group
NPI 1083835441 (865) 481-1000
Southeastern Emergency Physicians LLC
179 mi
Emergency Medicine
989 MEDICAL PARK DR
Maysville, KY 41056
  • Reassigned Medicare billing, Tennessee enrollment
  • 1,071 clinicians in this Medicare group
NPI 1356379382 (606) 759-5311
Nv Pacs 2 LLC
1,831 mi
Hospitalist
10550 PARK RUN DR
Las Vegas, NV 89144
  • Reassigned Medicare billing, Tennessee enrollment
  • 253 clinicians in this Medicare group
NPI 1427534809 (865) 693-1000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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.
1,762 services308 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.
207 services187 patients
Hospital discharge day management, more than 30 minutes 99239
Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.
183 services170 patients

Hospital Affiliations CMS Care Compare 3

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

Wellmont Bristol Regional Medical Center

Acute Care Hospitals · Bristol, TN
1/5 CMS rating
OwnershipGovernment - Hospital District or Authority
CMS Certification Number440012
LocationOne Medical Park BlvdBristol, TN 37620 · Sullivan County
Emergency services Birthing friendly

Wellmont Holston Valley Medical Center

Acute Care Hospitals · Kingsport, TN
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number440017
Location130 West Ravine RoadKingsport, TN 37662 · Sullivan County
Emergency services

Sycamore Shoals Hospital

Acute Care Hospitals · Elizabethton, TN
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number440018
Location1501 West Elk AvenueElizabethton, TN 37643 · Carter County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 37604 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
$93.60 typical visit price
range $16.72 – $131.41
Typical copayment $23.40 (range $4.18 – $32.85)
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.

Referred Medical Equipment & Supplies CMS DME claims 15

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Walker, folding, wheeled, adjustable or fixed height E0143
DME-Other DME · category DE000N
2 suppliers15 claims15 services$57.43 avg. paid by Medicare
Walker, heavy duty, wheeled, rigid or folding, any type E0149
DME-Other DME · category DE000N
2 suppliers49 claims49 services$9.90 avg. paid by Medicare
Commode chair, mobile or stationary, with fixed arms E0163
DME-Other DME · category DE000N
2 suppliers13 claims13 services$64.09 avg. paid by Medicare
Commode chair, mobile or stationary, with detachable arms E0165
DME-Other DME · category DE000N
3 suppliers30 claims30 services$10.46 avg. paid by Medicare
Commode chair, extra wide and/or heavy duty, stationary or mobile, with or without arms, any type, each E0168
DME-Other DME · category DE000N
1 supplier17 claims17 services$11.11 avg. paid by Medicare
Hospital bed, semi-electric (head and foot adjustment), with any type side rails, with mattress E0260
DME-Hospital Beds · category DB000N
5 suppliers51 claims51 services$64.03 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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.

SAMANTHA BOOKBINDER MD
Student in an Organized Health Care Education/Training Program
325 N STATE OF FRANKLIN RD
JOHNSON CITY, TN 37604
Washington County (845) 269-1362
DEBORAH ANN THIBEAULT LCSW
Social Worker (Clinical)
325 N STATE OF FRANKLIN RD
JOHNSON CITY, TN 37604
Washington County (423) 439-7320
LEAH ALEXANDRA SURBAUGH PHARMD
Pharmacist (Psychiatric)
325 N STATE OF FRANKLIN RD
JOHNSON CITY, TN 37604
Washington County (423) 439-7280
VARSHINI NARMADA RAMASAMY BALASUBRAMANIAN MBBS
Student in an Organized Health Care Education/Training Program
325 N STATE OF FRANKLIN RD
JOHNSON CITY, TN 37604
Washington County (423) 439-7320
HASAN DAHER MD
Student in an Organized Health Care Education/Training Program
325 N STATE OF FRANKLIN RD
JOHNSON CITY, TN 37604
Washington County (423) 439-7280
ANGELA G WILLOCKS NP
Nurse Practitioner (Family)
325 N STATE OF FRANKLIN RD, GROUND FLOOR
JOHNSON CITY, TN 37604
Washington County (423) 439-7320
JOHN WILLIAM SCHWEITZER M.D.
Pediatrics
325 N STATE OF FRANKLIN RD, GROUND FLOOR
JOHNSON CITY, TN 37604
Washington County (423) 439-7320
MICHAEL AGOSTINO DO
Student in an Organized Health Care Education/Training Program
325 N STATE OF FRANKLIN RD
JOHNSON CITY, TN 37604
Washington County (423) 439-7320

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 Clifford Williamson's NPI number?

The NPI number for Clifford Williamson is 1154562304. It was assigned to this individual provider in the NPPES registry on March 18, 2009.

Where is Clifford Williamson located?

Clifford Williamson practices at 325 N State Of Franklin Rd, Johnson City, TN 37604. The listed phone number is (423) 439-6283.

What is Clifford Williamson's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Clifford Williamson enrolled in Medicare?

Yes. Clifford Williamson 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 Clifford Williamson's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Clifford Williamson reassigns Medicare benefits to 5 organizations: Tri-Cities Regional Emergency Physicians, PC (Johnson City, TN), Ipc Pac Healthcare Services Of Tennessee PC (Bristol, TN), Southeastern Physician Services PC (Oak Ridge, TN), Southeastern Emergency Physicians LLC (Maysville, KY) and Nv Pacs 2 LLC (Las Vegas, NV). 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 Clifford Williamson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Clifford Williamson accept?

Health plans from Oscar Insurance Company list Clifford Williamson 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 Clifford Williamson affiliated with any hospitals?

According to CMS data, Clifford Williamson is affiliated with Wellmont Bristol Regional Medical Center, Wellmont Holston Valley Medical Center and Sycamore Shoals Hospital.

When was this NPI record last updated?

The NPPES record for Clifford Williamson was last updated on April 29, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.