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GRACE LOZINSKI MD INC
NPI 1811865892
Internal Medicine in Irvine, CA

Active since October 29, 2025
4950 BARRANCA PKWY STE 207, IRVINE, CA 92604(949) 262-9700(949) 262-0700 Get Directions Write a Review

NPPES record last updated: March 3, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Grace Lozinski Md Inc NPPES

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

GRACE LOZINSKI MD INC (NPI 1811865892) is a healthcare organization registered as an internal medicine in Irvine, California and active in the NPI registry since October 2025. The organization lists Grace Lozinski, Owner, as its authorized official.

NPPES Registry Identity

NPI1811865892
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameGRACE LOZINSKI MD INC
Location Address4950 BARRANCA PKWY STE 207Irvine, CA 92604-8648
Mailing Address2108 N St Ste NSacramento, CA 95816-5712 · (949) 262-9700 · Fax (949) 262-0700
Phone(949) 262-9700
Fax(949) 262-0700
Organization SubpartNo
Authorized OfficialGrace LozinskiOwner · (949) 262-9700
Enumeration DateOctober 29, 2025
Last NPPES UpdateMarch 3, 2026
NPPES CertifiedMarch 3, 2026
✔ NPI 1811865892 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.
4950 BARRANCA PKWY STE 207, Irvine, CA 92604
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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)

Grace Lozinski Md Inc 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 Grace Lozinski MD Inc, which bills Medicare for the services this clinician delivers.

Clinician (1)

Grace Lozinski, M.D.
Internal Medicine
NPI 1659399582
4950 BARRANCA PKWY STE 207
Irvine, CA 92604
(949) 262-9700
✔ 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.

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 Grace Lozinski MD Inc's NPI number?

The NPI number for Grace Lozinski MD Inc is 1811865892. It was assigned to this organization in the NPPES registry on October 29, 2025.

Where is Grace Lozinski MD Inc located?

Grace Lozinski MD Inc is located at 4950 Barranca Pkwy Ste 207, Irvine, CA 92604. The listed phone number is (949) 262-9700.

What is Grace Lozinski MD Inc's specialty?

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

Is Grace Lozinski MD Inc enrolled in Medicare?

Yes. Grace Lozinski MD Inc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Grace Lozinski MD Inc?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Grace Lozinski MD Inc. 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 Grace Lozinski MD Inc was last updated on March 3, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.