DR. ANDREW ROBERT WILLIAMS MD
NPI 1548505142
Internal Medicine - Cardiovascular Disease in Mesa, AZ

Active since December 07, 2012PECOS EnrolledAccepts Medicare Assignment
95.11/100
CMS Quality Rating
6309 E BAYWOOD AVE STE 101, MESA, AZ 85206(480) 641-5400(480) 218-4353 Get Directions Write a Review

NPPES record last updated: June 25, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jun 25, 2025, Jul 30, 2020, Jun 9, 2017 (3 updates tracked since 2017).

About Dr. Andrew Robert Williams Md NPPES

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

DR. ANDREW ROBERT WILLIAMS MD (NPI 1548505142) is an individual cardiovascular disease provider in Mesa, Arizona, licensed in Arizona (53167) and active in the NPI registry since December 2012. He is enrolled in Medicare PECOS and is a graduate of University Of Arizona College Of Medicine (2012).

NPPES Registry Identity

NPI1548505142
Entity TypeIndividualMale
Primary Taxonomy207RC0000X
Provider Legal NameDR. ANDREW ROBERT WILLIAMSCredential: MD
Location Address6309 E BAYWOOD AVE STE 101Mesa, AZ 85206-1726
Mailing Address6309 E Baywood Ave Ste 101Mesa, AZ 85206-1726 · (480) 641-5400 · Fax (480) 218-4353
Fax(480) 218-4353
Sole ProprietorNo
Medical School CMSUniversity Of Arizona College Of MedicineGraduated 2012
Enumeration DateDecember 7, 2012
Last NPPES UpdateJune 25, 20253 updates tracked since enumeration
NPPES CertifiedJune 25, 2025
NPI 1548505142 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RC0000X
License Licensed in AZ · 53167
Definition
An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.
Also ListedInternal MedicineTaxonomy 207R00000X · License 53167 (AZ)
Also ListedPediatricsTaxonomy 208000000X · License 53167 (AZ)
6309 E BAYWOOD AVE STE 101, Mesa, AZ 85206

Accepted 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

Dr. Andrew Robert Williams 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 ID7214219666
PECOS Enrollment IDI20170120000732
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 25

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 93000
An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.
1,290 services842 patients
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.
1,206 services841 patients
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.
258 services107 patients
Injection, regadenoson, 0.1 mg J2785
Regadenoson injection, 0.1 mg, is a medication used to help visualize the heart during a stress test. It works by increasing blood flow in the arteries of the heart. It's injected into a vein and is generally well-tolerated.
212 services53 patients
Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 93306
This is a heart ultrasound, also known as an echocardiogram. It uses sound waves to create pictures of your heart, showing how blood flows through it. The color depicts the blood flow's speed and direction. It also checks the heart's valves to ensure they're working properly.
198 services189 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.
154 services135 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 85206 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
$127.71 typical visit price
range $55.44 – $168.60
Typical copayment $31.92 (range $13.86 – $42.15)
Most-billed visit code 99204
Established Patient
$69.24 typical visit price
range $17.72 – $137.41
Typical copayment $17.31 (range $4.43 – $34.35)
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.

95.11/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality90.22
Improvement Activities40

Other Providers at the Same Location NPPES 16

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Internal Medicine (Cardiovascular Disease)
6309 E BAYWOOD AVE STE 101
MESA, AZ 85206
Registered Nurse (Cardiac Rehabilitation)
6309 E BAYWOOD AVE STE 101
MESA, AZ 85206
Internal Medicine (Clinical Cardiac Electrophysiology)
6309 E BAYWOOD AVE STE 101
MESA, AZ 85206
Nurse Practitioner (Family)
6309 E BAYWOOD AVE STE 101
MESA, AZ 85206
Nurse Practitioner (Acute Care)
6309 E BAYWOOD AVE STE 101
MESA, AZ 85206
Internal Medicine (Interventional Cardiology)
6309 E BAYWOOD AVE STE 101
MESA, AZ 85206
Internal Medicine (Cardiovascular Disease)
6309 E BAYWOOD AVE STE 101
MESA, AZ 85206
Internal Medicine (Cardiovascular Disease)
6309 E BAYWOOD AVE STE 101
MESA, AZ 85206

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 Andrew Williams's NPI number?

The NPI number for Andrew Williams is 1548505142. It was assigned to this individual provider in the NPPES registry on December 7, 2012.

Where is Andrew Williams located?

Andrew Williams practices at 6309 E Baywood Ave Ste 101, Mesa, AZ 85206. The listed phone number is (480) 641-5400.

What is Andrew Williams's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Is Andrew Williams enrolled in Medicare?

Yes. Andrew 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 Andrew Williams accept?

Health plans from Ambetter from Arizona Complete Health, Blue Cross Blue Shield of Arizona and UnitedHealthcare list Andrew 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.

When was this NPI record last updated?

The NPPES record for Andrew Williams was last updated on June 25, 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.