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DR. ARMANDO F. SIQUEIROS, M.D., INC.
NPI 1861180945
Internal Medicine in San Luis Obispo, CA

Active since April 27, 2023CLIA 05D2297214 · Waiver
842 CALIFORNIA BLVD, SAN LUIS OBISPO, CA 93401(805) 549-5277(805) 549-5293 Get Directions Write a Review

NPPES record last updated: April 27, 2023. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. Armando F. Siqueiros, M.d., Inc. NPPES

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

DR. ARMANDO F. SIQUEIROS, M.D., INC. (NPI 1861180945) is a healthcare organization registered as an internal medicine in San Luis Obispo, California and active in the NPI registry since April 2023. The organization holds a CLIA Waiver certificate valid through January 10, 2028 and lists Armando F Siqueiros, Physician/owner, as its authorized official.

NPPES Registry Identity

NPI1861180945
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameDR. ARMANDO F. SIQUEIROS, M.D., INC.
Location Address842 CALIFORNIA BLVDSan Luis Obispo, CA 93401-2902
Mailing Address842 California BlvdSan Luis Obispo, CA 93401-2902 · (805) 549-5277 · Fax (805) 549-5293
Phone(805) 549-5277
Fax(805) 549-5293
Organization SubpartNo
Authorized OfficialArmando F SiqueirosPhysician/owner · (805) 549-5277
Enumeration DateApril 27, 2023
NPPES CertifiedApril 27, 2023
✔ NPI 1861180945 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.
842 CALIFORNIA BLVD, San Luis Obispo, CA 93401
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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)

Dr. Armando F. Siqueiros, M.d., 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 Dr. Armando F. Siqueiros, M.D., Inc., which bills Medicare for the services this clinician delivers.

Clinician (1)

Armando Siqueiros, MD
Internal Medicine
NPI 1699758540
842 CALIFORNIA BLVD
San Luis Obispo, CA 93401
(805) 549-5277
✔ 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 05D2297214

Dr Armando F Siqueiros MD Inc · San Luis Obispo, CA
Active · expires Jan 10, 2028
CLIA Number05D2297214
Laboratory TypePhysician Office
Certificate Effective DateJanuary 11, 2026
Certificate Expiration DateJanuary 10, 2028
Laboratory DirectorArmando F. Siqueiros
Laboratory Phone(805) 549-5277
Laboratory LocationDr Armando F Siqueiros MD Inc842 California Blvd, San Luis Obispo, CA 93401
CLIA data matches this NPI record on: Address 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 Dr. Armando F. Siqueiros, M.D., Inc.'s NPI number?

The NPI number for Dr. Armando F. Siqueiros, M.D., Inc. is 1861180945. It was assigned to this organization in the NPPES registry on April 27, 2023.

Where is Dr. Armando F. Siqueiros, M.D., Inc. located?

Dr. Armando F. Siqueiros, M.D., Inc. is located at 842 California Blvd, San Luis Obispo, CA 93401. The listed phone number is (805) 549-5277.

What is Dr. Armando F. Siqueiros, M.D., Inc.'s specialty?

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

Is Dr. Armando F. Siqueiros, M.D., Inc. enrolled in Medicare?

Yes. Dr. Armando F. Siqueiros, M.D., Inc. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Dr. Armando F. Siqueiros, M.D., Inc.?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Dr. Armando F. Siqueiros, 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.

Does Dr. Armando F. Siqueiros, M.D., Inc. hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 05D2297214) is associated with this NPI, valid through January 10, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Dr. Armando F. Siqueiros, M.D., Inc. was last updated on April 27, 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.