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MS. THERESA L MARSCHIK LCSW
NPI 1669864583
Social Worker - Clinical in Denver, CO

Active since March 02, 2015PECOS Enrolled
2090 S PEARL ST, DENVER, CO 80210(405) 246-6800 Get Directions Write a Review

NPPES record last updated: March 19, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Mar 19, 2026, Nov 26, 2025 (2 updates tracked since 2025).

About Ms. Theresa L Marschik Lcsw NPPES

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

MS. THERESA L MARSCHIK LCSW (NPI 1669864583) is an individual clinical provider in Denver, Colorado, licensed in Colorado (CSW.09925217) and active in the NPI registry since March 2015. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1669864583
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameMS. THERESA L MARSCHIKCredential: LCSW
Location Address2090 S PEARL STDenver, CO 80210-4043
Mailing Address2090 S Pearl StDenver, CO 80210-4043 · (405) 246-6800
Phone(405) 246-6800
Sole ProprietorYes
Enumeration DateMarch 2, 2015
Last NPPES UpdateMarch 19, 20262 updates tracked since enumeration
NPPES CertifiedMarch 19, 2026
✔ NPI 1669864583 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
Licenses✔ Licensed in CO · CSW.09925217✔ Licensed in OK · 4666
Definition
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances.
2090 S PEARL ST, Denver, CO 80210
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Insurance Company, Select Health, UnitedHealthcare.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)

Ms. Theresa L Marschik Lcsw 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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 80210 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
$0.00 typical visit price
range $58.06 – $174.82
Typical copayment $0.00 (range $14.51 – $43.70)
Most-billed visit code NA
Established Patient
$72.20 typical visit price
range $18.88 – $142.79
Typical copayment $18.05 (range $4.72 – $35.69)
Most-billed visit code 99213
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 Theresa Marschik's NPI number?

The NPI number for Theresa Marschik is 1669864583. It was assigned to this individual provider in the NPPES registry on March 2, 2015.

Where is Theresa Marschik located?

Theresa Marschik practices at 2090 S Pearl St, Denver, CO 80210. The listed phone number is (405) 246-6800.

What is Theresa Marschik's specialty?

The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.

Is Theresa Marschik enrolled in Medicare?

Yes. Theresa Marschik is registered in the Medicare PECOS enrollment system.

What insurance does Theresa Marschik accept?

Health plans from Oscar Insurance Company, Select Health and UnitedHealthcare list Theresa Marschik 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 Theresa Marschik was last updated on March 19, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.