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TATUM RIDGE INTERNAL MEDICINE PLC
NPI 1083622997
Internal Medicine in Phoenix, AZ

Active since August 04, 2006CLIA 03D0527558 · Waiver
18404 N TATUM BLVD, STE 205, PHOENIX, AZ 85032(602) 971-5500(602) 944-0504 Get Directions Write a Review

NPPES record last updated: March 30, 2011. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Tatum Ridge Internal Medicine Plc NPPES

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

TATUM RIDGE INTERNAL MEDICINE PLC (NPI 1083622997) is a healthcare organization registered as an internal medicine in Phoenix, Arizona and active in the NPI registry since August 2006. The organization holds a CLIA Waiver certificate valid through December 22, 2027 and lists David Lawrence Elliot, Physician Partner, as its authorized official.

NPPES Registry Identity

NPI1083622997
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameTATUM RIDGE INTERNAL MEDICINE PLC
Location Address18404 N TATUM BLVD, STE 205Phoenix, AZ 85032-1509
Mailing Address18404 N Tatum Blvd, Ste 205Phoenix, AZ 85032-1509 · (602) 971-5500 · Fax (602) 944-0504
Phone(602) 971-5500
Fax(602) 944-0504
Organization SubpartNo
Authorized OfficialDavid Lawrence ElliotPhysician Partner · (602) 971-5500
Enumeration DateAugust 4, 2006
Last NPPES UpdateMarch 30, 2011
✔ NPI 1083622997 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.
18404 N TATUM BLVD, Phoenix, AZ 85032
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Other Identifiers 5

Medicare UPINB38749AZ
Medicare UPINE90081AZ
Medicare UPIND36801AZ
Medicare PIN63515AZ
Medicare UPINH00069AZ

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

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Tatum Ridge Internal Medicine Plc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

6

Medicare enrollment records show 6 clinicians reassign Medicare billing to Tatum Ridge Internal Medicine Plc, which bills Medicare for the services they deliver. Of these, 3 practice at this address and 4 within 10 miles. They are listed nearest first.

Clinicians, nearest first (6)

Lawrence Gassner, MD
Internal Medicine
NPI 1558379461
18404 N TATUM BLVD STE 205
Phoenix, AZ 85032
(602) 971-5500
✔ PECOS✔ Accepts MedicareSame address
Brian Jorgensen, MD
Internal Medicine
NPI 1730197658
18404 N TATUM BLVD SUITE 205
Phoenix, AZ 85032
(602) 971-5500
✔ PECOS✔ Accepts MedicareSame address
David Elliott, MD
Internal Medicine
NPI 1194733006
18404 N TATUM BLVD STE 205
Phoenix, AZ 85032
(602) 971-5500
✔ PECOSSame address
Dannah Farah, MD
Internal Medicine
NPI 1275094401
7400 E THOMPSON PEAK PKWY
Scottsdale, AZ 85255
(602) 445-0751
✔ PECOS✔ Accepts Medicare3.4 mi
Jennifer Kim, M.D.
Internal Medicine
NPI 1902118086
7150 E CAMELBACK RD STE 105
Scottsdale, AZ 85251
(888) 663-6331
✔ PECOS✔ Accepts Medicare11 mi
Chi Duong, DO
Internal Medicine
NPI 1285642108
4840 E INDIAN SCHOOL RD STE 101
Phoenix, AZ 85018
(602) 522-1900
✔ PECOS✔ Accepts Medicare11 mi

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 03D0527558

Tatum Ridge Internal Medicine Plc · Phoenix, AZ
Active · expires Dec 22, 2027
CLIA Number03D0527558
Laboratory TypePhysician Office
Certificate Effective DateDecember 23, 2025
Certificate Expiration DateDecember 22, 2027
Laboratory DirectorLarry K. Gassner
Laboratory Phone(602) 971-5500
Laboratory LocationTatum Ridge Internal Medicine Plc18404 N Tatum Blvd #205, Phoenix, AZ 85032
CLIA data matches this NPI record on: Address Name Phone
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 Tatum Ridge Internal Medicine Plc's NPI number?

The NPI number for Tatum Ridge Internal Medicine Plc is 1083622997. It was assigned to this organization in the NPPES registry on August 4, 2006.

Where is Tatum Ridge Internal Medicine Plc located?

Tatum Ridge Internal Medicine Plc is located at 18404 N Tatum Blvd Ste 205, Phoenix, AZ 85032. The listed phone number is (602) 971-5500.

What is Tatum Ridge Internal Medicine Plc's specialty?

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

Is Tatum Ridge Internal Medicine Plc enrolled in Medicare?

Yes. Tatum Ridge Internal Medicine Plc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Tatum Ridge Internal Medicine Plc?

According to the CMS Revalidation Reassignment List (October 2026 release), 6 clinicians, all in Internal Medicine, reassign their Medicare billing to Tatum Ridge Internal Medicine Plc. 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. Of these, 3 practice at this address and 4 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Tatum Ridge Internal Medicine Plc hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 03D0527558) is associated with this NPI, valid through December 22, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Tatum Ridge Internal Medicine Plc was last updated on March 30, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.