MR. MICHAEL STEVEN SANTILLAN PA-C, CAQ-PSYCH
NPI 1861139628
Physician Assistant - Medical in Mission Viejo, CA

Q: What is Michael Santillan's NPI number?

The NPI number for Michael Santillan is 1861139628. It was assigned to this individual provider in the NPPES registry on May 13, 2022.

Q: What is Michael Santillan's specialty?

The primary specialty registered for this NPI is Physician Assistant, specializing in Medical, with taxonomy code 363AM0700X.

Q: When was this NPI record last updated?

The NPPES record for Michael Santillan was last updated on September 30, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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 May 13, 2022PECOS EnrolledAccepts Medicare Assignment

26024 ACERO, MISSION VIEJO, CA 92691(714) 545-5550(949) 609-0374 Get Directions Write a Review

NPPES record last updated: September 30, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Oct 19, 2023, May 13, 2022 (2 updates tracked since 2022).

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About Mr. Michael Steven Santillan Pa-c, Caq-psych NPPES

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

MR. MICHAEL STEVEN SANTILLAN PA-C, CAQ-PSYCH (NPI 1861139628) is an individual medical provider in Mission Viejo, California, licensed in California (PA61412) and active in the NPI registry since May 2022. He is enrolled in Medicare PECOS and is a graduate of Other (2022).

NPPES Registry Identity

NPI1861139628

Entity TypeIndividualMale

Primary Taxonomy363AM0700X

Provider Legal NameMR. MICHAEL STEVEN SANTILLANCredential: PA-C, CAQ-PSYCH

Location Address26024 ACEROMission Viejo, CA 92691-2768

Mailing Address19782 Macarthur Blvd Ste 300Irvine, CA 92612-2417 · (714) 545-5550 · Fax (949) 991-2040

Phone(714) 545-5550

Fax(949) 609-0374

Sole ProprietorNo

Medical School CMSOtherGraduated 2022

Enumeration DateMay 13, 2022

Last NPPES UpdateSeptember 30, 20252 updates tracked since enumeration

NPPES CertifiedSeptember 30, 2025

✔ NPI 1861139628 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPhysician Assistant · MedicalPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363AM0700X

License✔ Licensed in CA · PA61412

Also ListedClinical Nurse Specialist · Psychiatric/Mental HealthTaxonomy 364SP0808X · License PA61412 (CA)

26024 ACERO, Mission Viejo, CA 92691

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Providence Health Plan.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mr. Michael Steven Santillan Pa-c, Caq-psych is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID8729454921

PECOS Enrollment IDI20221012003366

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 3

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

139 services35 patients

Psychotherapy with evaluation and management visit, 30 minutes 90833

Psychotherapy with evaluation and management is a 30-minute session where a mental health professional talks with you about your concerns and feelings. They assess your mental health, provide support, and manage your treatment plan to help improve your well-being.

81 services30 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

65 services22 patients

Other Providers at the Same Location NPPES 11

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

JOSEPH ZACHARY NOJAN

Physician Assistant (Medical)