CASSIE MARK LLC
NPI 1497255236
Optometrist in Newton, MA

Q: What is Cassie Mark LLC's NPI number?

The NPI number for Cassie Mark LLC is 1497255236. It was assigned to this organization in the NPPES registry on February 19, 2018.

Q: What is Cassie Mark LLC's specialty?

The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.

Q: When was this NPI record last updated?

The NPPES record for Cassie Mark LLC was last updated on April 19, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.

Active since February 19, 2018

42 LANGLEY RD, NEWTON, MA 02459(617) 869-8464 Get Directions Write a Review

NPPES record last updated: April 19, 2019. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Apr 19, 2019, Feb 19, 2018 (2 updates tracked since 2018).

On this page

About Cassie Mark Llc NPPES

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

CASSIE MARK LLC (NPI 1497255236) is a healthcare organization registered as an optometrist in Newton, Massachusetts and active in the NPI registry since February 2018. The organization lists Cassandra L Mark, Optometrist, as its authorized official.

NPPES Registry Identity

NPI1497255236

Entity TypeOrganization

Primary Taxonomy152W00000X

Legal Business NameCASSIE MARK LLC

Location Address42 LANGLEY RDNewton, MA 02459-1918

Mailing Address42 Langley RdNewton, MA 02459-1918 · (617) 431-5747

Phone(617) 869-8464

Organization SubpartNo

Authorized OfficialCassandra L MarkOptometrist · (617) 431-5747

Enumeration DateFebruary 19, 2018

Last NPPES UpdateApril 19, 20192 updates tracked since enumeration

✔ NPI 1497255236 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOptometristEye and Vision Services Providers

Taxonomy Code152W00000X

License✔ Licensed in MA · 5229

Definition

Doctors of optometry (ODs) are the primary health care professionals for the eye. Optometrists examine, diagnose, treat, and manage diseases, injuries, and disorders of the visual system, the eye, and associated structures as well as identify related systemic conditions affecting the eye. An optometrist has completed pre-professional undergraduate education in a college or university and four years of professional education at a college of optometry, leading to the doctor of optometry (O.D.) degree. Some optometrists complete an optional residency in a specific area of practice. Optometrists are eye health care professionals state-licensed to diagnose and treat diseases and disorders of the eye and visual system.

42 LANGLEY RD, Newton, MA 02459

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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

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, Blue Cross and Blue Shield of Louisiana, Blue Cross Blue Shield of Wyoming.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Cassie Mark Llc 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 Cassie Mark LLC, which bills Medicare for the services this clinician delivers.

Clinician (1)

Cassandra Mark, OD

Optometry

NPI 1487182010

42 LANGLEY RD
Newton, MA 02459

(617) 431-5747

✔ 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.

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 Cassie Mark LLC's NPI number?

The NPI number for Cassie Mark LLC is 1497255236. It was assigned to this organization in the NPPES registry on February 19, 2018.

Where is Cassie Mark LLC located?

Cassie Mark LLC is located at 42 Langley Rd, Newton, MA 02459. The listed phone number is (617) 869-8464.

What is Cassie Mark LLC's specialty?

The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.

Is Cassie Mark LLC enrolled in Medicare?

Yes. Cassie Mark LLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Cassie Mark LLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Optometry) reassigns their Medicare billing to Cassie Mark LLC. 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.

What insurance does Cassie Mark LLC accept?

Health plans from Anthem Blue Cross and Blue Shield, Blue Cross Blue Shield of Wyoming and Blue Cross and Blue Shield of Louisiana list Cassie Mark LLC 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 Cassie Mark LLC was last updated on April 19, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.