What is Alexander Mark's NPI number?

Alexander Mark's National Provider Identifier (NPI) is 1629880018, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Alexander Mark's specialty?

Alexander Mark is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).

Where is Alexander Mark located?

Alexander Mark's practice location on file with NPPES is 1623 Kings Hwy, Brooklyn, NY 11229-1209.

What is Alexander Mark's phone number?

The practice phone number listed in the NPPES registry for Alexander Mark is (929) 273-7601.

Is Alexander Mark's NPI active?

Yes — Alexander Mark's NPI (1629880018) is active in the NPPES registry as of the last update on 2025-01-22.

IndividualActive

Alexander Mark

NPI 1629880018 · Mental Health Counselor · Brooklyn, NY

Alexander Mark is a Mental Health Counselor provider in Brooklyn, NY (NPI 1629880018).

Provider details

NPI number: 1629880018
Entity type: Individual
Primary specialty: Mental Health CounselorBehavioral Health & Social Service Providers
Sole proprietor: No
License: 0

Specialties & taxonomies

Mental Health CounselorPrimary101YM0800XLicense 0
Behavioral Health & Social Service Providers

Profile Score

Established profile(55/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
1 yr 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

1623 Kings Hwy

Brooklyn, NY 11229-1209

Phone: (929) 273-7601

Street-level locationGet directions

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Mailing address