Katelin Williamson, D.O.
NPI 1477967859 · Psychiatry Physician · Columbia, SC
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Katelin Williamson, D.O. is a Psychiatry Physician provider in Columbia, SC (NPI 1477967859).
Provider details
- NPI number
- 1477967859
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Female
- Sole proprietor
- No
- License
- 36709 (SC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
12 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Clonidine Hcl | 69 |
| Aripiprazole | 56 |
| Clozapine | 39 |
| Guanfacine Hclbrand: Guanfacine Hcl Er | 25 |
| Hydroxyzine Hcl | 24 |
| Clonazepam | 23 |
| Paroxetine Hcl | 20 |
| Divalproex Sodium | 15 |
| Escitalopram Oxalate | 15 |
| Valproic Acid (as Sodium Salt)brand: Valproic Acid |
Practice location
Mailing address
Additional practice locations (1)
- 3555 Harden Street Ext Ste 141Columbia, SC 29203-6894Phone: (803) 434-4300Fax: (803) 434-8326
Registry dates
- Enumerated
- 2014-06-13
- Last updated
- 2021-04-23
- Certified
- 2021-04-23
Frequently asked questions
- What is Katelin Williamson's NPI number?
- Katelin Williamson's National Provider Identifier (NPI) is 1477967859, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katelin Williamson's specialty?
- Katelin Williamson is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Katelin Williamson located?
- Katelin Williamson's practice location on file with NPPES is 720 Gracern Rd Ste 120, Columbia, SC 29210-7657.
- What is Katelin Williamson's phone number?
- The practice phone number listed in the NPPES registry for Katelin Williamson is (803) 296-2585.
- Does Katelin Williamson accept Medicare?
- Katelin Williamson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Katelin Williamson's NPI active?
- Yes — Katelin Williamson's NPI (1477967859) is active in the NPPES registry as of the last update on 2021-04-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.