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ALEXANDER NICHOLAS MARKS
NPI 1144748914
Counselor in Saint Louis, MO

Active since August 31, 2017PECOS Enrolled
2190 S MASON RD STE 311, SAINT LOUIS, MO 63131(636) 300-9333 Get Directions Write a Review

NPPES record last updated: November 6, 2025. Verified against the NPPES registry weekly; last sync: August 30, 2026.

Record update history: Nov 6, 2025, Sep 10, 2025, Jul 21, 2022 and 2 more (5 updates tracked since 2017).

About Alexander Nicholas Marks NPPES

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

ALEXANDER NICHOLAS MARKS (NPI 1144748914) is an individual counselor in Saint Louis, Missouri and active in the NPI registry since August 2017. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1144748914
Entity TypeIndividualMale
Primary Taxonomy101Y00000X
Provider Legal NameALEXANDER NICHOLAS MARKS
Location Address2190 S MASON RD STE 311Saint Louis, MO 63131-1639
Mailing Address471 Mission Bay DrWildwood, MO 63040-1523 · (617) 717-4242
Phone(636) 300-9333
Sole ProprietorYes
Enumeration DateAugust 31, 2017
Last NPPES UpdateNovember 6, 20255 updates tracked since enumeration
NPPES CertifiedNovember 6, 2025
✔ NPI 1144748914 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselorBehavioral Health & Social Service Providers
Taxonomy Code101Y00000X
Definition
A provider who is trained and educated in the performance of behavior health services through interpersonal communications and analysis. Training and education at the specialty level usually requires a master's degree and clinical experience and supervision for licensure or certification.
2190 S MASON RD STE 311, Saint Louis, MO 63131
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, Medica, Oscar Insurance Company and more.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Alexander Nicholas Marks is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

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 Alexander Marks's NPI number?

The NPI number for Alexander Marks is 1144748914. It was assigned to this individual provider in the NPPES registry on August 31, 2017.

Where is Alexander Marks located?

Alexander Marks practices at 2190 S Mason Rd Ste 311, Saint Louis, MO 63131. The listed phone number is (636) 300-9333.

What is Alexander Marks's specialty?

The primary specialty registered for this NPI is Counselor with taxonomy code 101Y00000X.

Is Alexander Marks enrolled in Medicare?

Yes. Alexander Marks is registered in the Medicare PECOS enrollment system.

What insurance does Alexander Marks accept?

Health plans from Anthem Blue Cross and Blue Shield, Medica, Oscar Insurance Company, Providence Health Plan and UnitedHealthcare list Alexander Marks as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Alexander Marks was last updated on November 6, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.