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GERARD B CHAMBERLIN MD MPH PC
NPI 1417183583
Internal Medicine in Mesa, AZ

Active since June 03, 2009CLIA 03D2147082 · Waiver
6242 E ARBOR AVE STE 123, MESA, AZ 85206(804) 930-4600(480) 930-4615 Get Directions Write a Review

NPPES record last updated: June 10, 2024. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jun 10, 2024, Jun 8, 2023 (2 updates tracked since 2023).

About Gerard B Chamberlin Md Mph Pc NPPES

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

GERARD B CHAMBERLIN MD MPH PC (NPI 1417183583) is a healthcare organization registered as an internal medicine in Mesa, Arizona and active in the NPI registry since June 2009. The organization holds a CLIA Waiver certificate valid through April 11, 2028 and lists Gerard B Chamberlin, Proprietor, as its authorized official.

NPPES Registry Identity

NPI1417183583
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameGERARD B CHAMBERLIN MD MPH PC
Location Address6242 E ARBOR AVE STE 123Mesa, AZ 85206-1309
Mailing Address6242 E Arbor Ave Ste 123Mesa, AZ 85206-1309 · (480) 930-4600 · Fax (480) 993-4615
Phone(804) 930-4600
Fax(480) 930-4615
Organization SubpartNo
Authorized OfficialGerard B ChamberlinProprietor · (480) 930-4600
Enumeration DateJune 3, 2009
Last NPPES UpdateJune 10, 20242 updates tracked since enumeration
NPPES CertifiedJune 10, 2024
✔ NPI 1417183583 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in AZ · 41160
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.
Also ListedPediatricsTaxonomy 208000000X · License 41160 (AZ)
6242 E ARBOR AVE STE 123, Mesa, AZ 85206
Open in Google Maps ↗

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Accepted Insurance

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

Gerard B Chamberlin Md Mph Pc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Gerard B Chamberlin MD Mph PC, which bills Medicare for the services this clinician delivers.

Clinician (1)

Gerard Chamberlin, MD
Internal Medicine
NPI 1750503124
6242 E ARBOR AVE STE 123
Mesa, AZ 85206
(480) 930-4600
✔ PECOS✔ Accepts MedicareSame address

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

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 03D2147082

Gerard B Chamberlin, MD Mph PC · Mesa, AZ
Active · expires Apr 11, 2028
CLIA Number03D2147082
Laboratory TypePhysician Office
Certificate Effective DateApril 12, 2026
Certificate Expiration DateApril 11, 2028
Laboratory DirectorGerard B. Chamberlin
Laboratory Phone(480) 467-9542
Laboratory LocationGerard B Chamberlin, MD Mph PC6242 E Arbor Ave, Ste 123, Mesa, AZ 85206
CLIA data matches this NPI record on: Address Name
This certificate is issued to a laboratory to perform only waived tests.

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 Gerard B Chamberlin MD Mph PC's NPI number?

The NPI number for Gerard B Chamberlin MD Mph PC is 1417183583. It was assigned to this organization in the NPPES registry on June 3, 2009.

Where is Gerard B Chamberlin MD Mph PC located?

Gerard B Chamberlin MD Mph PC is located at 6242 E Arbor Ave Ste 123, Mesa, AZ 85206. The listed phone number is (804) 930-4600.

What is Gerard B Chamberlin MD Mph PC's specialty?

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

Is Gerard B Chamberlin MD Mph PC enrolled in Medicare?

Yes. Gerard B Chamberlin MD Mph PC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Gerard B Chamberlin MD Mph PC?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Gerard B Chamberlin MD Mph PC. 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. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Gerard B Chamberlin MD Mph PC hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 03D2147082) is associated with this NPI, valid through April 11, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

What insurance does Gerard B Chamberlin MD Mph PC accept?

Health plans from Ambetter Health and Ambetter from Arizona Complete Health list Gerard B Chamberlin MD Mph PC 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 Gerard B Chamberlin MD Mph PC was last updated on June 10, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.