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THE MAXWELL GROUP LLP
NPI 1912188384
Internal Medicine in Sun City, AZ

Active since November 14, 2007
14678 N DEL WEBB BLVD, SUN CITY, AZ 85351(623) 933-8289(623) 933-2596 Get Directions Write a Review

NPPES record last updated: June 16, 2018. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jun 16, 2018, Mar 29, 2018 (2 updates tracked since 2018).

About The Maxwell Group Llp NPPES

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

THE MAXWELL GROUP LLP (NPI 1912188384) is a healthcare organization registered as an internal medicine in Sun City, Arizona and active in the NPI registry since November 2007. The organization lists Thomas Joshua Maxwell, Managing Partner, as its authorized official.

NPPES Registry Identity

NPI1912188384
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameMAXWELL GROUP
Location Address14678 N DEL WEBB BLVDSun City, AZ 85351-2137
Mailing Address14678 N Del Webb BlvdSun City, AZ 85351-2137 · (623) 933-8289 · Fax (623) 933-2596
Phone(623) 933-8289
Fax(623) 933-2596
Organization SubpartNo
Authorized OfficialThomas Joshua MaxwellManaging Partner · (623) 933-8289
Enumeration DateNovember 14, 2007
Last NPPES UpdateJune 16, 20182 updates tracked since enumeration
✔ NPI 1912188384 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
14678 N DEL WEBB BLVD, Sun City, AZ 85351
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Other Names 1

Doing Business AsThe Maxwell Group Llp

Other Identifiers 1

OtherCG8234AZ · Railroad Medicare

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arizona Complete Health.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

The Maxwell Group Llp is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

17

Medicare enrollment records show 17 clinicians reassign Medicare billing to The Maxwell Group LLP, which bills Medicare for the services they deliver. Of these, 8 practice at this address and 14 within 10 miles. They are listed nearest first.

Clinicians by Medicare Specialty 3

Internal Medicine8
Family Practice5
Nurse Practitioner4

Clinicians, nearest first (17)

Mark Brown, M.D.
Internal Medicine
NPI 1225021264
14678 N DEL WEBB BLVD
Sun City, AZ 85351
(623) 933-8289
✔ PECOSSame address
Michael Johnson, M.D.
Internal Medicine
NPI 1609869643
14678 N DEL WEBB BLVD
Sun City, AZ 85351
(623) 933-8289
✔ PECOS✔ Accepts MedicareSame address
Thomas Maxwell, M.D.
Internal Medicine
NPI 1396738324
14678 N DEL WEBB BLVD
Sun City, AZ 85351
(623) 933-8289
✔ PECOSSame address
Umesh Narayanan, MD
Family Practice
NPI 1407239601
14678 N DEL WEBB BLVD
Sun City, AZ 85351
(623) 933-8289
✔ PECOS✔ Accepts MedicareSame address
Srinivasa Palnati, MD
Internal Medicine
NPI 1881688992
14678 N DEL WEBB BLVD
Sun City, AZ 85351
(623) 933-8289
✔ PECOS✔ Accepts MedicareSame address
Cynthia Medina, D.O.
Family Practice
NPI 1710064183
14678 N DEL WEBB BLVD
Sun City, AZ 85351
(623) 933-8289
✔ PECOS✔ Accepts MedicareSame address
Seokhan Song, D.O., M.S.
Family Practice
NPI 1194163170
14678 N DEL WEBB BLVD
Sun City, AZ 85351
(623) 933-8289
✔ PECOS✔ Accepts MedicareSame address
Michael Willcox, MD
Family Practice
NPI 1053809855
14678 N DEL WEBB BLVD
Sun City, AZ 85351
(623) 933-8289
✔ PECOS✔ Accepts MedicareSame address
Christopher Huber, FNP-C
Nurse Practitioner
NPI 1124551965
14678 N DEL WEBB BLVD
Sun City, AZ 85351
(623) 933-8289
✔ PECOS0.1 mi
Ron Loomis, APRN FNP-BC
Nurse Practitioner
NPI 1740054469
14678 N DEL WEBB BLVD
Sun City, AZ 85351
(623) 933-8289
✔ PECOS✔ Accepts Medicare0.1 mi
Randall Piette, M.D.
Internal Medicine
NPI 1154314243
10503 W THUNDERBIRD BLVD STE 262
Sun City, AZ 85351
(623) 933-8289
✔ PECOS✔ Accepts Medicare1.0 mi
Yujie Shui, DO
Family Practice
NPI 1891352647
17674 N LITCHFIELD RD
Surprise, AZ 85374
(623) 281-3001
✔ PECOS✔ Accepts Medicare4.3 mi
Rayette Casiano, M.D.
Internal Medicine
NPI 1528140209
6611 W PEORIA AVE
Glendale, AZ 85302
(602) 325-5580
✔ PECOS✔ Accepts Medicare5.8 mi
Tony Lee, DO
Internal Medicine
NPI 1497753123
5555 W THUNDERBIRD RD
Glendale, AZ 85306
(602) 865-5555
✔ PECOS✔ Accepts Medicare6.5 mi
Veronica Erivez, FNP-C
Nurse Practitioner
NPI 1780287532
9610 N METRO PKWY W
Phoenix, AZ 85051
(877) 809-5092
✔ PECOS✔ Accepts Medicare10 mi
David Nagata, MD
Internal Medicine
NPI 1750371324
3202 E GREENWAY RD STE 1401
Phoenix, AZ 85032
(888) 405-6396
✔ PECOS✔ Accepts Medicare16 mi
Tammy Quibell Greenfield, APRN, FNP-C
Nurse Practitioner
NPI 1184297533
54 RED OAK DR
Crossville, TN 38555
(602) 319-2033
✔ PECOS✔ Accepts Medicare1,552 mi

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

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 Maxwell Group's NPI number?

The NPI number for Maxwell Group is 1912188384. It was assigned to this organization in the NPPES registry on November 14, 2007. The provider is doing business as The Maxwell Group LLP.

Where is Maxwell Group located?

Maxwell Group is located at 14678 N Del Webb Blvd, Sun City, AZ 85351. The listed phone number is (623) 933-8289.

What is Maxwell Group's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Maxwell Group enrolled in Medicare?

Yes. Maxwell Group is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Maxwell Group?

According to the CMS Revalidation Reassignment List (October 2026 release), 17 clinicians in 3 Medicare specialties reassign their Medicare billing to Maxwell Group. A 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 the clinician's services. The largest specialties are Internal Medicine (8), Family Practice (5) and Nurse Practitioner (4). Of these, 8 practice at this address and 14 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

What insurance does Maxwell Group accept?

Health plans from Ambetter from Arizona Complete Health list Maxwell Group 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 Maxwell Group was last updated on June 16, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.