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DR. WILLIAM KENT JOHNSON M.D.
NPI 1891798682
Surgery in Round Rock, TX

Active since May 24, 2005PECOS EnrolledAccepts Medicare Assignment
75/100
CMS Quality Rating
511 OAKWOOD BLVD STE 150, ROUND ROCK, TX 78681(248) 629-2176(248) 856-4704 Get Directions Write a Review

NPPES record last updated: September 18, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 18, 2025, Jun 17, 2020, May 9, 2018 and 3 more (6 updates tracked since 2016).

About Dr. William Kent Johnson M.d. NPPES

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

DR. WILLIAM KENT JOHNSON M.D. (NPI 1891798682) is an individual surgery provider in Round Rock, Texas, licensed in Texas (H6320) and active in the NPI registry since May 2005. He is enrolled in Medicare PECOS and is a graduate of Other (1988).

NPPES Registry Identity

NPI1891798682
Entity TypeIndividualMale
Primary Taxonomy208600000X
Provider Legal NameDR. WILLIAM KENT JOHNSONCredential: M.D.
Location Address511 OAKWOOD BLVD STE 150Round Rock, TX 78681-4068
Mailing Address7125 Orchard Lake Rd Ste 210West Bloomfield, MI 48322-3618 · (248) 629-2176 · Fax (248) 856-4704
Phone(248) 629-2176
Fax(248) 856-4704
Sole ProprietorNo
Medical School CMSOtherGraduated 1988
Enumeration DateMay 24, 2005
Last NPPES UpdateSeptember 18, 20256 updates tracked since enumeration
NPPES CertifiedSeptember 18, 2025
✔ NPI 1891798682 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians
Taxonomy Code208600000X
License✔ Licensed in TX · H6320
Definition
A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.
Also ListedRadiology · Diagnostic RadiologyTaxonomy 2085R0202X · License H6320 (TX)
511 OAKWOOD BLVD STE 150, Round Rock, TX 78681
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Other Identifiers 3

Medicaid096817404TX
MedicaidP000662G2TX
Medicaid096817403TX

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections and more.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. William Kent Johnson 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 ID9638175946
PECOS Enrollment IDI20080317000390
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

2

Medicare enrollment records show William Johnson reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Srinivas Rao MD PA
137 mi
Surgery
11221 KATY FWY STE 115
Houston, TX 77079
  • Reassigned Medicare billing, Texas enrollment
  • 35 clinicians in this Medicare group
NPI 1972941318 (281) 888-1464
Texas Group PLLC
190 mi
Surgery
1105 CENTRAL EXPY N STE 2240
Allen, TX 75013
  • Reassigned Medicare billing, Texas enrollment
  • 16 clinicians in this Medicare group
NPI 1720477706 (866) 607-2308

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 11

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.

Ultrasound study of one arm or leg veins with compression and maneuvers 93971
This is a non-invasive procedure using sound waves to visualize veins in an arm or leg. It involves applying gentle pressure and performing certain movements. It helps identify any abnormal blood flow or clots, ensuring vascular health.
225 services130 patients
Injection of chemical agent into multiple incompetent veins of leg 36471
This procedure involves injecting a special chemical into problematic veins in the leg. The chemical helps to close off these veins, rerouting blood through healthier veins. This can alleviate discomfort and improve the appearance of the treated area.
175 services94 patients
Ultrasound study of arm or leg veins with compression and maneuvers 93970
An ultrasound study of arm or leg veins with compression and maneuvers is a non-invasive procedure that uses sound waves to create images of your veins. This helps identify blood clots or other vein problems. During the procedure, pressure is applied to the veins and certain movements are performed to assess blood flow.
132 services114 patients
Destruction of first incompetent vein of arm or leg using radiofrequency and imaging guidance 36475
This procedure involves using radiofrequency energy, a type of heat energy, to close off an unhealthy vein in your arm or leg. Imaging guidance helps ensure precise targeting of the vein. This helps improve blood flow by rerouting it through healthier veins.
126 services68 patients
Laser destruction of incompetent vein of arm or leg using imaging guidance 36478
Laser destruction of an incompetent vein is a non-invasive procedure where a laser is used to seal off a malfunctioning vein in the arm or leg. The process is guided by imaging technology to ensure precision and effectiveness. This helps alleviate symptoms like pain and swelling.
122 services80 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
76 services70 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 78681 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
$84.92 typical visit price
range $54.84 – $166.88
Typical copayment $21.23 (range $13.71 – $41.72)
Most-billed visit code 99203
Established Patient
$68.55 typical visit price
range $17.52 – $136.11
Typical copayment $17.13 (range $4.38 – $34.02)
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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

75/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice

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 William Johnson's NPI number?

The NPI number for William Johnson is 1891798682. It was assigned to this individual provider in the NPPES registry on May 24, 2005.

Where is William Johnson located?

William Johnson practices at 511 Oakwood Blvd Ste 150, Round Rock, TX 78681. The listed phone number is (248) 629-2176.

What is William Johnson's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Is William Johnson enrolled in Medicare?

Yes. William Johnson 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 William Johnson's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Johnson reassigns Medicare benefits to 2 organizations: Srinivas Rao MD PA (Houston, TX) and Texas Group PLLC (Allen, TX). 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 William Johnson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does William Johnson accept?

Health plans from Ambetter Health, Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections and Ambetter from Superior HealthPlan and 5 other insurers list William Johnson 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.

When was this NPI record last updated?

The NPPES record for William Johnson was last updated on September 18, 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.