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DR. JEFFERSON GARY WILLIAMS M.D.
NPI 1235381435
Emergency Medicine in Chapel Hill, NC

Active since October 21, 2008PECOS EnrolledAccepts Medicare Assignment
170 MANNING DRIVE, CB# 7594, UNC DEPT OF EMERGENCY MEDICINE, CHAPEL HILL, NC 27599(919) 966-6442 Get Directions Write a Review

NPPES record last updated: July 7, 2011. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. Jefferson Gary Williams M.d. NPPES

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

DR. JEFFERSON GARY WILLIAMS M.D. (NPI 1235381435) is an individual emergency medicine provider in Chapel Hill, North Carolina, licensed in North Carolina (2010-00784) and active in the NPI registry since October 2008. He is enrolled in Medicare PECOS, is affiliated with Wakemed, Raleigh Campus, and is a graduate of University Of North Carolina At Chapel Hill School Of Medicine (2007).

NPPES Registry Identity

NPI1235381435
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameDR. JEFFERSON GARY WILLIAMSCredential: M.D.
Location Address170 MANNING DRIVE, CB# 7594, UNC DEPT OF EMERGENCY MEDICINEChapel Hill, NC 27599-7594
Mailing Address170 Manning Drive, Cb# 7594, Unc Dept Of Emergency MedicineChapel Hill, NC 27599-7594 · (919) 966-6442
Phone(919) 966-6442
Sole ProprietorNo
Medical School CMSUniversity Of North Carolina At Chapel Hill School Of MedicineGraduated 2007
Enumeration DateOctober 21, 2008
Last NPPES UpdateJuly 7, 2011
✔ NPI 1235381435 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in NC · 2010-00784
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.
170 MANNING DRIVE, CB# 7594, Chapel Hill, NC 27599
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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. Jefferson Gary Williams M.d. 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 ID4486770286
PECOS Enrollment IDI20100929001314
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 Jefferson Williams reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Wake Emergency Physicians PA
14 mi
Emergency Medicine
210 TOWNE VILLAGE DR
Cary, NC 27513
  • Reassigned Medicare billing, North Carolina enrollment
  • 182 clinicians in this Medicare group
NPI 1265923205 (919) 859-3373

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 4

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.

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010
A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.
128 services119 patients
Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
126 services125 patients
Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
24 services24 patients
Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
14 services14 patients

Hospital Affiliations CMS Care Compare

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

Wakemed, Raleigh Campus

Acute Care Hospitals · Raleigh, NC
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number340069
Location3000 New Bern AveRaleigh, NC 27610 · Wake County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 27599 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
$83.90 typical visit price
range $54.12 – $165.09
Typical copayment $20.97 (range $13.53 – $41.27)
Most-billed visit code 99203
Established Patient
$95.94 typical visit price
range $17.21 – $134.61
Typical copayment $23.98 (range $4.30 – $33.65)
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.

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 Jefferson Williams's NPI number?

The NPI number for Jefferson Williams is 1235381435. It was assigned to this individual provider in the NPPES registry on October 21, 2008.

Where is Jefferson Williams located?

Jefferson Williams practices at 170 Manning Drive, Cb# 7594 Unc Dept Of Emergency Medicine, Chapel Hill, NC 27599. The listed phone number is (919) 966-6442.

What is Jefferson Williams's specialty?

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

Is Jefferson Williams enrolled in Medicare?

Yes. Jefferson 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.

Which organization bills Medicare for Jefferson Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Jefferson Williams reassigns Medicare benefits to Wake Emergency Physicians PA (Cary, NC). 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 Jefferson Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Jefferson Williams affiliated with any hospitals?

According to CMS data, Jefferson Williams is affiliated with Wakemed, Raleigh Campus.

When was this NPI record last updated?

The NPPES record for Jefferson Williams was last updated on July 7, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 years 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.