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KARL D. BASSLER, M.D, INC
NPI 1114198975
Dermatology in Laguna Hills, CA

Active since March 19, 2008
23961 CALLE DE LA MAGDALENA, # 520, LAGUNA HILLS, CA 92653(949) 855-3376(949) 609-1971 Get Directions Write a Review

NPPES record last updated: March 7, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Karl D. Bassler, M.d, Inc NPPES

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

KARL D. BASSLER, M.D, INC (NPI 1114198975) is a healthcare organization registered as a dermatology in Laguna Hills, California and active in the NPI registry since March 2008. The organization lists Karl David Bassler, President, as its authorized official.

NPPES Registry Identity

NPI1114198975
Entity TypeOrganization
Primary Taxonomy207N00000X
Legal Business NameKARL D. BASSLER, M.D, INC
Location Address23961 CALLE DE LA MAGDALENA, # 520Laguna Hills, CA 92653-3616
Mailing Address23961 Calle De La Magdalena, # 520Laguna Hills, CA 92653-3616 · (949) 855-3376 · Fax (949) 609-1971
Phone(949) 855-3376
Fax(949) 609-1971
Organization SubpartNo
Authorized OfficialKarl David BasslerPresident · (949) 855-3376
Enumeration DateMarch 19, 2008
Last NPPES UpdateMarch 7, 2023
✔ NPI 1114198975 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyDermatologyAllopathic & Osteopathic Physicians
Taxonomy Code207N00000X
License✔ Licensed in CA · A64015
Definition
A dermatologist is trained to diagnose and treat pediatric and adult patients with benign and malignant disorders of the skin, mouth, external genitalia, hair and nails, as well as a number of sexually transmitted diseases. The dermatologist has had additional training and experience in the diagnosis and treatment of skin cancers, melanomas, moles and other tumors of the skin, the management of contact dermatitis and other allergic and nonallergic skin disorders, and in the recognition of the skin manifestations of systemic (including internal malignancy) and infectious diseases. Dermatologists have special training in dermatopathology and in the surgical techniques used in dermatology. They also have expertise in the management of cosmetic disorders of the skin such as hair loss and scars and the skin changes associated with aging.
Also ListedDermatology · DermatopathologyTaxonomy 207ND0900X · License A64015 (CA)
Also ListedDermatology · Procedural DermatologyTaxonomy 207NS0135X · License A64015 (CA)
23961 CALLE DE LA MAGDALENA, Laguna Hills, CA 92653
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Other Identifiers 4

OtherH17881CA · Upin #
OtherP00230697CA · Railroad Medicare Pin #
OtherDD4828CA · Railroad Medicare Group #
OtherA64015CA · 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 MULTIPLE SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Karl D. Bassler, M.d, Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Revalidation Due Date

Revalidation due by February 28, 2027

Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.

StateEnrollment IDDue date
StateCaliforniaEnrollment IDO20040901000690Non-DME Part B · Clinic/Group PracticeDue dateFebruary 28, 2027
Source: CMS Revalidation Due Date List, October 2026 release.

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Karl D. Bassler, M.D, Inc, which bills Medicare for the services this clinician delivers.

Clinician (1)

Karl Bassler, M.D.
Dermatology
NPI 1215938949
23961 MAGDALENA #520
Laguna Hills, CA 92653
(949) 855-3376
✔ PECOS✔ Accepts Medicare0.1 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 Karl D. Bassler, M.D, Inc's NPI number?

The NPI number for Karl D. Bassler, M.D, Inc is 1114198975. It was assigned to this organization in the NPPES registry on March 19, 2008.

Where is Karl D. Bassler, M.D, Inc located?

Karl D. Bassler, M.D, Inc is located at 23961 Calle De La Magdalena # 520, Laguna Hills, CA 92653. The listed phone number is (949) 855-3376.

What is Karl D. Bassler, M.D, Inc's specialty?

The primary specialty registered for this NPI is Dermatology with taxonomy code 207N00000X.

Is Karl D. Bassler, M.D, Inc enrolled in Medicare?

Yes. Karl D. Bassler, M.D, Inc is registered in the Medicare PECOS enrollment system.

When is Karl D. Bassler, M.D, Inc's Medicare revalidation due?

According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (California, Clinic/Group Practice) is due for revalidation by February 28, 2027. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.

How many clinicians bill Medicare through Karl D. Bassler, M.D, Inc?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Dermatology) reassigns their Medicare billing to Karl D. Bassler, M.D, 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 Karl D. Bassler, M.D, Inc was last updated on March 7, 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.