INTERNAL MEDICINE & LAB DIAGNOSTICS PC
NPI 1013934983
Internal Medicine in Phoenix, AZ

Q: What is Internal Medicine & Lab Diagnostics PC's specialty?

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

Active since July 16, 2006

333 E VIRGINIA AVE, #214, PHOENIX, AZ 85004(602) 258-3122(602) 258-3119 Get Directions Write a Review

NPPES record last updated: December 11, 2007. Verified against the NPPES registry weekly; last sync: November 01, 2026.

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About Internal Medicine & Lab Diagnostics Pc NPPES

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

INTERNAL MEDICINE & LAB DIAGNOSTICS PC (NPI 1013934983) is a healthcare organization registered as an internal medicine in Phoenix, Arizona and active in the NPI registry since July 2006. The organization lists Nada Krnjaic, Medical Director, as its authorized official.

NPPES Registry Identity

NPI1013934983

Entity TypeOrganization

Primary Taxonomy207R00000X

Legal Business NameINTERNAL MEDICINE & LAB DIAGNOSTICS PC

Location Address333 E VIRGINIA AVE, #214Phoenix, AZ 85004

Mailing Address333 E Virginia Ave, #214Phoenix, AZ 85004 · (602) 258-3122 · Fax (602) 258-3119

Phone(602) 258-3122

Fax(602) 258-3119

Organization SubpartNo

Authorized OfficialNada KrnjaicMedical Director · (602) 258-3122

Enumeration DateJuly 16, 2006

Last NPPES UpdateDecember 11, 2007

✔ NPI 1013934983 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in AZ · 24505

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.

333 E VIRGINIA AVE, Phoenix, AZ 85004

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Other Identifiers 2

Medicare UPING34012

Medicare PINZ20577AZ

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)

Internal Medicine & Lab Diagnostics 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 Internal Medicine & Lab Diagnostics PC, which bills Medicare for the services this clinician delivers.

Clinician (1)

Nada Krnjaic, M.D.

Internal Medicine

NPI 1538345848

333 E VIRGINIA AVE STE 214
Phoenix, AZ 85004

(602) 258-3122

✔ PECOSSame address

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 Internal Medicine & Lab Diagnostics PC's NPI number?

The NPI number for Internal Medicine & Lab Diagnostics PC is 1013934983. It was assigned to this organization in the NPPES registry on July 16, 2006.

Where is Internal Medicine & Lab Diagnostics PC located?

Internal Medicine & Lab Diagnostics PC is located at 333 E Virginia Ave #214, Phoenix, AZ 85004. The listed phone number is (602) 258-3122.

What is Internal Medicine & Lab Diagnostics PC's specialty?

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

Is Internal Medicine & Lab Diagnostics PC enrolled in Medicare?

Yes. Internal Medicine & Lab Diagnostics PC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Internal Medicine & Lab Diagnostics PC?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Internal Medicine & Lab Diagnostics 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.

When was this NPI record last updated?

The NPPES record for Internal Medicine & Lab Diagnostics PC was last updated on December 11, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.