Cassie Mark LLC
NPI 1497255236 · Optometrist · Newton, MA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Cassie Mark LLC is a Optometrist organization in Newton, MA (NPI 1497255236).
Provider details
- NPI number
- 1497255236
- Entity type
- Organization
- Primary specialty
- OptometristEye and Vision Services Providers
- Organization subpart
- No
- Authorized official
- Cassandra Mark, Optometrist(617) 431-5747
- License
- 5229 (MA)
Specialties & taxonomies
Eye and Vision Services Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
8 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2018-02-19
- Last updated
- 2019-04-19
Frequently asked questions
- What is Cassie Mark LLC's NPI number?
- Cassie Mark LLC's National Provider Identifier (NPI) is 1497255236, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Cassie Mark LLC?
- Cassie Mark LLC is classified in the NPPES registry as Optometrist (Eye and Vision Services Providers).
- Where is Cassie Mark LLC located?
- Cassie Mark LLC's practice location on file with NPPES is 42 Langley Rd, Newton, MA 02459-1918.
- What is Cassie Mark LLC's phone number?
- The practice phone number listed in the NPPES registry for Cassie Mark LLC is (617) 869-8464.
- Does Cassie Mark LLC accept Medicare?
- Cassie Mark LLC is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Cassie Mark LLC?
- The authorized official listed on Cassie Mark LLC's NPPES record is Cassandra Mark, Optometrist. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Cassie Mark LLC's NPI active?
- Yes — Cassie Mark LLC's NPI (1497255236) is active in the NPPES registry as of the last update on 2019-04-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.