REJAN MCCASKILL MD INC
NPI 1376152314
Internal Medicine in Newport Beach, CA

Q: What is Rejan Mccaskill MD Inc's NPI number?

The NPI number for Rejan Mccaskill MD Inc is 1376152314. It was assigned to this organization in the NPPES registry on July 27, 2020.

Q: What is Rejan Mccaskill MD Inc's specialty?

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

Active since July 27, 2020CLIA 05D2213731 · Waiver

320 SUPERIOR AVE STE 330, NEWPORT BEACH, CA 92663(949) 791-2000(949) 791-2001 Get Directions Write a Review

NPPES record last updated: September 3, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Sep 3, 2025, Nov 10, 2023, Feb 18, 2021 and 1 more (4 updates tracked since 2020).

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About Rejan Mccaskill Md Inc NPPES

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

REJAN MCCASKILL MD INC (NPI 1376152314) is a healthcare organization registered as an internal medicine in Newport Beach, California and active in the NPI registry since July 2020. The organization holds a CLIA Waiver certificate valid through February 15, 2027 and lists Rejan C. Mccaskill, Owner, as its authorized official.

NPPES Registry Identity

NPI1376152314

Entity TypeOrganization

Primary Taxonomy207R00000X

Legal Business NameREJAN MCCASKILL MD INC

Location Address320 SUPERIOR AVE STE 330Newport Beach, CA 92663-2772

Mailing AddressPo Box 1855Suisun City, CA 94585-4855 · (657) 241-3600 · Fax (657) 241-7708

Phone(949) 791-2000

Fax(949) 791-2001

Organization SubpartNo

Authorized OfficialRejan C. MccaskillOwner · (949) 791-2000

Enumeration DateJuly 27, 2020

Last NPPES UpdateSeptember 3, 20254 updates tracked since enumeration

NPPES CertifiedSeptember 3, 2025

✔ NPI 1376152314 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.

320 SUPERIOR AVE STE 330, Newport Beach, CA 92663

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Other Identifiers 1

OtherCB355667CA · 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

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Rejan Mccaskill 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 Rejan Mccaskill MD Inc, which bills Medicare for the services this clinician delivers.

Clinician (1)

Rejan Mccaskill, M.D., F.A.C.P.

Internal Medicine

NPI 1790852606

320 SUPERIOR AVE STE 330
Newport Beach, CA 92663

(949) 791-2000

✔ 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 05D2213731

Rejan Mccaskill, MD Inc · Newport Beach, CA

Active · expires Feb 15, 2027

CLIA Number05D2213731

Laboratory TypePhysician Office

Certificate Effective DateFebruary 16, 2025

Certificate Expiration DateFebruary 15, 2027

Laboratory DirectorRejean Mccaskill

Laboratory Phone(949) 791-2000

Laboratory LocationRejan Mccaskill, MD Inc355 Placentia Ave Ste 208, Newport Beach, CA 92663

CLIA data matches this NPI record on: 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 Rejan Mccaskill MD Inc's NPI number?

The NPI number for Rejan Mccaskill MD Inc is 1376152314. It was assigned to this organization in the NPPES registry on July 27, 2020.

Where is Rejan Mccaskill MD Inc located?

Rejan Mccaskill MD Inc is located at 320 Superior Ave Ste 330, Newport Beach, CA 92663. The listed phone number is (949) 791-2000.

What is Rejan Mccaskill MD Inc's specialty?

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

Is Rejan Mccaskill MD Inc enrolled in Medicare?

Yes. Rejan Mccaskill MD Inc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Rejan Mccaskill MD Inc?

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

Does Rejan Mccaskill MD Inc hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 05D2213731) is associated with this NPI, valid through February 15, 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 Rejan Mccaskill MD Inc was last updated on September 3, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.