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DR. MARK D. MOSK PHD
NPI 1407362189
Psychologist - Clinical in San Mateo, CA

Active since December 18, 2017PECOS EnrolledAccepts Medicare Assignment
226 DE ANZA BLVD, SAN MATEO, CA 94402(650) 999-0220(855) 999-0220 Get Directions Write a Review

NPPES record last updated: February 4, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Feb 4, 2026, Jul 1, 2021, Jun 17, 2021 and 1 more (4 updates tracked since 2017).

About Dr. Mark D. Mosk Phd NPPES

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

DR. MARK D. MOSK PHD (NPI 1407362189) is an individual clinical provider in San Mateo, California, licensed in Illinois (71006089) and active in the NPI registry since December 2017. He is enrolled in Medicare PECOS, maintains a secondary practice location in Highland Park, and is a graduate of Other (1982).

NPPES Registry Identity

NPI1407362189
Entity TypeIndividualMale
Primary Taxonomy103TC0700X
Provider Legal NameDR. MARK D. MOSKCredential: PHD
Location Address226 DE ANZA BLVDSan Mateo, CA 94402-3913
Mailing Address678 Lotus PlHighland Park, IL 60035-1227 · (847) 652-6565 · Fax (855) 999-0220
Phone(650) 999-0220
Fax(855) 999-0220
Sole ProprietorYes
Medical School CMSOtherGraduated 1982
Enumeration DateDecember 18, 2017
Last NPPES UpdateFebruary 4, 20264 updates tracked since enumeration
NPPES CertifiedFebruary 4, 2026
✔ NPI 1407362189 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologist · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code103TC0700X
Licenses✔ Licensed in IL · 71006089✔ Licensed in CA · PSY8865
Definition
A psychologist who provides continuing and comprehensive mental and behavioral health care for individuals and families; consultation to agencies and communities; training, education and supervision; and research-based practice. It is a specialty in breadth -- one that is broadly inclusive of severe psychopathology -- and marked by comprehensiveness and integration of knowledge and skill from a broad array of disciplines within and outside of psychology proper. The scope of clinical psychology encompasses all ages, multiple diversities and varied systems.
226 DE ANZA BLVD, San Mateo, CA 94402
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Secondary Practice Location 1

Location 1678 Lotus PlHighland Park, IL 60035-1227 · Phone (847) 652-6565

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

Dr. Mark D. Mosk Phd 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 ID5092120170
PECOS Enrollment IDI20210223002375
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

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.

Psychotherapy, 1 hour 90837
Psychotherapy is a therapeutic interaction or treatment between a trained professional and a patient. In a 1-hour session, you'll talk about your feelings, thoughts, and behaviors to help identify and manage mental health issues. This process aids in personal growth, healing, and improved well-being.
549 services21 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94402 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
$202.35 typical visit price
range $69.00 – $202.35
Typical copayment $50.58 (range $17.25 – $50.58)
Most-billed visit code 99205
Established Patient
$119.48 typical visit price
range $23.44 – $166.46
Typical copayment $29.87 (range $5.86 – $41.61)
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.

Other Providers at the Same Location NPPES 2

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

LAWRENCE FEINSTEIN PHD
Psychologist (Clinical)
226 DE ANZA BLVD
SAN MATEO, CA 94402
San Mateo County (650) 999-0220
DORCAS GAINES
Counselor (Mental Health)
226 DE ANZA BLVD
SAN MATEO, CA 94402
San Mateo County (510) 424-6509

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 Mark Mosk's NPI number?

The NPI number for Mark Mosk is 1407362189. It was assigned to this individual provider in the NPPES registry on December 18, 2017.

Where is Mark Mosk located?

Mark Mosk practices at 226 De Anza Blvd, San Mateo, CA 94402. The listed phone number is (650) 999-0220.

What is Mark Mosk's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

Is Mark Mosk enrolled in Medicare?

Yes. Mark Mosk is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Mark Mosk was last updated on February 4, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.