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DR. WILLIAM MATTEW DENNIS M.D.
NPI 1427166503
Family Medicine in Corpus Christi, TX

Active since August 28, 2006PECOS EnrolledAccepts Medicare Assignment
100/100
CMS Quality Rating
3301 SOUTH ALAMEDA, SUITE 201, CORPUS CHRISTI, TX 78411(361) 658-4710(361) 857-8321 Get Directions Write a Review

NPPES record last updated: March 26, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Mar 26, 2026, Jul 31, 2024, Nov 6, 2023 and 1 more (4 updates tracked since 2023).

About Dr. William Mattew Dennis M.d. NPPES

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

DR. WILLIAM MATTEW DENNIS M.D. (NPI 1427166503) is an individual family medicine provider in Corpus Christi, Texas, licensed in Texas (F5517) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Corpus Christi, and is a graduate of University Of Missouri, Kansas City, School Of Medicine (1978).

NPPES Registry Identity

NPI1427166503
Entity TypeIndividualMale
Primary Taxonomy207Q00000X
Provider Legal NameDR. WILLIAM MATTEW DENNISCredential: M.D.
Location Address3301 SOUTH ALAMEDA, SUITE 201Corpus Christi, TX 78411-1820
Mailing Address6009 Pacific WayCorpus Christi, TX 78414-4409 · (361) 658-4710 · Fax (361) 579-1254
Phone(361) 658-4710
Fax(361) 857-8321
Sole ProprietorYes
Medical School CMSUniversity Of Missouri, Kansas City, School Of MedicineGraduated 1978
Enumeration DateAugust 28, 2006
Last NPPES UpdateMarch 26, 20264 updates tracked since enumeration
NPPES CertifiedMarch 26, 2026
✔ NPI 1427166503 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in TX · F5517
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
3301 SOUTH ALAMEDA, Corpus Christi, TX 78411
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Other Names 1

Other Name (5)Dr. Bill M Dennis M.d.

Secondary Practice Location 1

Location 16182 Dunbarton Oak St Ste BCorpus Christi, TX 78414-4276 · Phone (361) 452-9320 · Fax (361) 452-9321

Other Identifiers 1

Medicaid128651007TX

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 Mattew Dennis 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 ID7315083086
PECOS Enrollment IDI20100918000301
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

3

Medicare enrollment records show William Dennis reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Amistad Community Health Center Incorporated
1.7 mi
Federally Qualified Health Center (FQHC)
1533 S. BROWNLEE BLVD., STE. 100
Corpus Christi, TX 78404
  • Reassigned Medicare billing, Texas enrollment
  • 36 clinicians in this Medicare group
NPI 1386770147 (361) 884-2242
Dennis Sleep Medicine P.L.L.C.
6.1 mi
Sleep Medicine
6009 PACIFIC WAY
Corpus Christi, TX 78414
  • Reassigned Medicare billing, Texas enrollment
  • Medicare enrollment name: Dennis Sleep Medicine PLLC
NPI 1639858335 (361) 658-4710
Conviva Medical Center Management Of Texas, P.A.
137 mi
Internal Medicine
12602 TOEPPERWEIN RD STE 100
Live Oak, TX 78233
  • Reassigned Medicare billing, Texas enrollment
  • 161 clinicians in this Medicare group
NPI 1770988990 (210) 654-0030

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.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
104 services89 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
16 services16 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.
15 services15 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 78411 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
$97.05 typical visit price
range $17.52 – $136.11
Typical copayment $24.26 (range $4.38 – $34.02)
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.

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.

100/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Individually scored
Promoting Interoperability100
Improvement Activities40

Reported Quality Measures

e-Prescribing
92%2,246 patients2/55-star benchmark: 100%
Provide Patients Electronic Access to Their Health Information
100%813 patients5/55-star benchmark: 100%
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

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.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
9 suppliers18 claims38 services$6.04 avg. paid by Medicare
Tubing with integrated heating element for use with positive airway pressure device A4604
DME-Other DME · category DE001N
4 suppliers13 claims13 services$32.61 avg. paid by Medicare
Full face mask used with positive airway pressure device, each A7030
DME-Other DME · category DE001N
3 suppliers21 claims21 services$87.42 avg. paid by Medicare
Face mask interface, replacement for full face mask, each A7031
DME-Other DME · category DE001N
3 suppliers22 claims37 services$35.58 avg. paid by Medicare
Pillow for use on nasal cannula type interface, replacement only, pair A7033
DME-Other DME · category DE001N
3 suppliers23 claims138 services$15.25 avg. paid by Medicare
Nasal interface (mask or cannula type) used with positive airway pressure device, with or without head strap A7034
DME-Other DME · category DE001N
3 suppliers26 claims26 services$60.61 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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 Dennis's NPI number?

The NPI number for William Dennis is 1427166503. It was assigned to this individual provider in the NPPES registry on August 28, 2006. The provider is also known as Dr. Bill M Dennis M.D..

Where is William Dennis located?

William Dennis practices at 3301 South Alameda Suite 201, Corpus Christi, TX 78411. The listed phone number is (361) 658-4710.

What is William Dennis's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is William Dennis enrolled in Medicare?

Yes. William Dennis 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 Dennis's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Dennis reassigns Medicare benefits to 3 organizations: Amistad Community Health Center Incorporated (Corpus Christi, TX), Dennis Sleep Medicine P.L.L.C. (Corpus Christi, TX) and Conviva Medical Center Management Of Texas, P.A. (Live Oak, 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 Dennis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does William Dennis accept?

Health plans from Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter from Superior HealthPlan and Ambetter of Oklahoma and 2 other insurers list William Dennis 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 Dennis was last updated on March 26, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.