What is Mark Stewart's NPI number?

Mark Stewart's National Provider Identifier (NPI) is 1619808987, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Mark Stewart's specialty?

Mark Stewart is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).

Where is Mark Stewart located?

Mark Stewart's practice location on file with NPPES is 1817 Pickens St, Columbia, SC 29201-2630.

What is Mark Stewart's phone number?

The practice phone number listed in the NPPES registry for Mark Stewart is (803) 856-2403.

Is Mark Stewart's NPI active?

Yes — Mark Stewart's NPI (1619808987) is active in the NPPES registry as of the last update on 2026-05-26.

IndividualActive

Mark Stewart

NPI 1619808987 · Marriage & Family Therapist · Columbia, SC

Mark Stewart is a Marriage & Family Therapist provider in Columbia, SC (NPI 1619808987).

Provider details

NPI number: 1619808987
Entity type: Individual
Primary specialty: Marriage & Family TherapistBehavioral Health & Social Service Providers
Sex: Male
Sole proprietor: Yes
License: 8305 (SC)

Specialties & taxonomies

Marriage & Family TherapistPrimary106H00000XLicense 8305 (SC)
Behavioral Health & Social Service Providers

Profile Score

Established profile(52/100 index)

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

Registry tenure38% of score
Under 1 yr in 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

1817 Pickens St

Columbia, SC 29201-2630

Phone: (803) 856-2403

Street-level locationGet directions

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Mailing address