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PAUL E. DIEHL, M.D., A MEDICAL CORPORATION
NPI 1538294103
Internal Medicine in West Hills, CA

Active since February 22, 2007
23101 SHERMAN PL STE 302, WEST HILLS, CA 91307(818) 347-1500(818) 347-4119 Get Directions Write a Review

NPPES record last updated: October 16, 2023. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Oct 16, 2023, Jul 21, 2020 (2 updates tracked since 2020).

About Paul E. Diehl, M.d., A Medical Corporation NPPES

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

PAUL E. DIEHL, M.D., A MEDICAL CORPORATION (NPI 1538294103) is a healthcare organization registered as an internal medicine in West Hills, California and active in the NPI registry since February 2007. The organization lists Paul E Diehl, Owner, as its authorized official.

NPPES Registry Identity

NPI1538294103
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NamePAUL E. DIEHL, M.D., A MEDICAL CORPORATION
Location Address23101 SHERMAN PL STE 302West Hills, CA 91307-2047
Mailing AddressPo Box 77790Corona, CA 92877-0126 · (951) 278-5590 · Fax (951) 272-9924
Phone(818) 347-1500
Fax(818) 347-4119
Organization SubpartNo
Authorized OfficialPaul E DiehlOwner · (818) 347-1500
Enumeration DateFebruary 22, 2007
Last NPPES UpdateOctober 16, 20232 updates tracked since enumeration
NPPES CertifiedOctober 16, 2023
✔ NPI 1538294103 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · A44437
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.
23101 SHERMAN PL STE 302, West Hills, CA 91307
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Other Identifiers 2

Medicaid000A44437CA
OtherA44437CA · Medical State License

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)

Paul E. Diehl, M.d., A Medical Corporation 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 Paul E. Diehl, M.D., A Medical Corporation, which bills Medicare for the services this clinician delivers.

Clinician (1)

Paul Diehl, M.D.
Hospice/Palliative Care
NPI 1336215607
23101 SHERMAN PL STE 302
West Hills, CA 91307
(818) 347-1500
✔ PECOS✔ Accepts Medicare0.2 mi

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 Paul E. Diehl, M.D., A Medical Corporation's NPI number?

The NPI number for Paul E. Diehl, M.D., A Medical Corporation is 1538294103. It was assigned to this organization in the NPPES registry on February 22, 2007.

Where is Paul E. Diehl, M.D., A Medical Corporation located?

Paul E. Diehl, M.D., A Medical Corporation is located at 23101 Sherman Pl Ste 302, West Hills, CA 91307. The listed phone number is (818) 347-1500.

What is Paul E. Diehl, M.D., A Medical Corporation's specialty?

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

Is Paul E. Diehl, M.D., A Medical Corporation enrolled in Medicare?

Yes. Paul E. Diehl, M.D., A Medical Corporation is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Paul E. Diehl, M.D., A Medical Corporation?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Hospice/Palliative Care) reassigns their Medicare billing to Paul E. Diehl, M.D., A Medical Corporation. 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 Paul E. Diehl, M.D., A Medical Corporation was last updated on October 16, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.