Theresa Williamson, MD
NPI 1194143644 · Neurological Surgery Physician · Providence, RI
Enrolled with Medicare as Practitioner - Neurosurgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Theresa Williamson, MD is a Neurological Surgery Physician provider in Providence, RI (NPI 1194143644).
Provider details
- NPI number
- 1194143644
- Entity type
- Individual
- Primary specialty
- Neurological Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- T289635 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
12 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
173 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 29 | $94 |
| Insertion of Cage Or Mesh Device to Spine Bone and Disc Space During Spine Fusion22853 | 25 | $267 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 25 | $179 |
| Fusion of Additional Segment of Spine22614 | 22 | $405 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 18 | $140 |
| Initial Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 40 Minutes99221 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$17,375 across 52 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 164 Summit AveProvidence, RI 02906-2853Phone: (401) 793-9166Fax: (401) 444-2788
Registry dates
- Enumerated
- 2014-04-02
- Last updated
- 2025-09-05
- Certified
- 2025-09-05
Frequently asked questions
- What is Theresa Williamson's NPI number?
- Theresa Williamson's National Provider Identifier (NPI) is 1194143644, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Theresa Williamson's specialty?
- Theresa Williamson is listed in the NPPES registry with a primary specialty of Neurological Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Theresa Williamson located?
- Theresa Williamson's practice location on file with NPPES is 593 Eddy St, Providence, RI 02903-4923.
- What is Theresa Williamson's phone number?
- The practice phone number listed in the NPPES registry for Theresa Williamson is (401) 793-9166.
- Does Theresa Williamson accept Medicare?
- Theresa Williamson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Theresa Williamson's NPI active?
- Yes — Theresa Williamson's NPI (1194143644) is active in the NPPES registry as of the last update on 2025-09-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.