Mark Sieg, CAP, LCSW
NPI 1548831522 · Clinical Social Worker · Gulfport, FL
Mark Sieg, CAP, LCSW is a Clinical Social Worker provider in Gulfport, FL (NPI 1548831522).
Provider details
- NPI number
- 1548831522
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- CAP, LCSW
- Sex
- Male
- Sole proprietor
- No
- License
- 2544 (FL)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
4 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
- 2021-07-09
- Last updated
- 2021-07-09
- Certified
- 2021-07-09
Frequently asked questions
- What is Mark Sieg's NPI number?
- Mark Sieg's National Provider Identifier (NPI) is 1548831522, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Sieg's specialty?
- Mark Sieg is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Mark Sieg located?
- Mark Sieg's practice location on file with NPPES is 5826 27th Ave S, Gulfport, FL 33707-5221.
- What is Mark Sieg's phone number?
- The practice phone number listed in the NPPES registry for Mark Sieg is (727) 301-0016.
- Is Mark Sieg's NPI active?
- Yes — Mark Sieg's NPI (1548831522) is active in the NPPES registry as of the last update on 2021-07-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.