DR. ALAN MARCUS M.D
NPI 1275631657
Internal Medicine - Endocrinology, Diabetes & Metabolism in Laguna Hills, CA

Q: What is Alan Marcus's NPI number?

The NPI number for Alan Marcus is 1275631657. It was assigned to this individual provider in the NPPES registry on September 20, 2006.

Q: What is Alan Marcus's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Q: Is Alan Marcus enrolled in Medicare?

No. Alan Marcus has opted out of Medicare through September 22, 2026. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

Q: When was this NPI record last updated?

The NPPES record for Alan Marcus was last updated on November 14, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.

Active since September 20, 2006Opted out of Medicare · through Sep 22, 2026

24422 AVENIDA DE LA CARLOTA STE 375, LAGUNA HILLS, CA 92653(949) 770-4177(949) 472-0305 Get Directions Write a Review

NPPES record last updated: November 14, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

On this page

About Dr. Alan Marcus M.d NPPES

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

DR. ALAN MARCUS M.D (NPI 1275631657) is an individual endocrinology, diabetes & metabolism provider in Laguna Hills, California, licensed in California (A39696) and active in the NPI registry since September 2006. He has opted out of Medicare through September 22, 2026 and remains eligible to order and refer.

NPPES Registry Identity

NPI1275631657

Entity TypeIndividualMale

Primary Taxonomy207RE0101X

Provider Legal NameDR. ALAN MARCUSCredential: M.D

Location Address24422 AVENIDA DE LA CARLOTA STE 375Laguna Hills, CA 92653-3668

Mailing Address24012 Calle De La Plata, 345Laguna Hills, CA 92653-3621 · (949) 770-4177 · Fax (949) 770-9639

Phone(949) 770-4177

Fax(949) 472-0305

Sole ProprietorNo

Enumeration DateSeptember 20, 2006

Last NPPES UpdateNovember 14, 2025

NPPES CertifiedNovember 14, 2025

✔ NPI 1275631657 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Endocrinology, Diabetes & MetabolismAllopathic & Osteopathic Physicians

Taxonomy Code207RE0101X

License✔ Licensed in CA · A39696

Definition

An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.

24422 AVENIDA DE LA CARLOTA STE 375, Laguna Hills, CA 92653

Open in Google Maps ↗

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Dr. Alan Marcus M.d has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from September 22, 2022 through September 22, 2026.

Opt-Out Effective DateSeptember 22, 2022

Opt-Out In Effect ThroughSeptember 22, 2026Opt-out affidavits renew automatically every two years unless cancelled

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92653 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$142.39 typical visit price

range $62.96 – $187.60

Typical copayment $35.59 (range $15.74 – $46.90)

Most-billed visit code 99204

Established Patient

$109.96 typical visit price

range $20.84 – $153.61

Typical copayment $27.49 (range $5.21 – $38.40)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Alan Marcus's NPI number?

The NPI number for Alan Marcus is 1275631657. It was assigned to this individual provider in the NPPES registry on September 20, 2006.

Where is Alan Marcus located?

Alan Marcus practices at 24422 Avenida De La Carlota Ste 375, Laguna Hills, CA 92653. The listed phone number is (949) 770-4177.

What is Alan Marcus's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Is Alan Marcus enrolled in Medicare?

No. Alan Marcus has opted out of Medicare through September 22, 2026. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

When was this NPI record last updated?

The NPPES record for Alan Marcus was last updated on November 14, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.