Marilyn Gebel-Sitts, LCSW
NPI 1437135639 · Clinical Social Worker · Fort Mill, SC
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marilyn Gebel-Sitts, LCSW is a Clinical Social Worker provider in Fort Mill, SC (NPI 1437135639).
Provider details
- NPI number
- 1437135639
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Female
- Sole proprietor
- Yes
- License
- LC300051 (DC)
Specialties & taxonomies
Behavioral Health & Social Service Providers
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 tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
293 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Psychotherapy, 1 Hour90837 | 293 | $114 |
Typical Medicare-allowed amounts for these services range $114–$114 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-12-20
- Last updated
- 2024-11-07
- Certified
- 2024-11-07
Frequently asked questions
- What is Marilyn Gebel-Sitts's NPI number?
- Marilyn Gebel-Sitts's National Provider Identifier (NPI) is 1437135639, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marilyn Gebel-Sitts's specialty?
- Marilyn Gebel-Sitts is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Marilyn Gebel-Sitts located?
- Marilyn Gebel-Sitts's practice location on file with NPPES is 1091 Market St, Fort Mill, SC 29708-6496.
- What is Marilyn Gebel-Sitts's phone number?
- The practice phone number listed in the NPPES registry for Marilyn Gebel-Sitts is (703) 728-4095.
- Does Marilyn Gebel-Sitts accept Medicare?
- Marilyn Gebel-Sitts is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marilyn Gebel-Sitts's NPI active?
- Yes — Marilyn Gebel-Sitts's NPI (1437135639) is active in the NPPES registry as of the last update on 2024-11-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.