Tammy Williamson
NPI 1487611182 · Certified Registered Nurse Anesthetist · Columbia, SC
Enrolled with Medicare as Practitioner - Certified Registered Nurse Anesthetist (crna) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tammy Williamson is a Certified Registered Nurse Anesthetist provider in Columbia, SC (NPI 1487611182).
Provider details
- NPI number
- 1487611182
- Entity type
- Individual
- Primary specialty
- Certified Registered Nurse AnesthetistPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Female
- Sole proprietor
- No
- License
- 1645 (SC)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 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
50 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) |
|---|---|---|
| Anesthesia for Procedure on Nerves, Muscles, Tendons, and Tissue of Forearm, Wrist, and Hand01810 | 19 | $89 |
| Anesthesia for Other Procedure on Forearm, Wrist, Or Hand Bones01830 | 16 | $114 |
| Anesthesia for Other Procedure on Top of Arm Bone and Shoulder Joint01630 | 15 | $169 |
Typical Medicare-allowed amounts for these services range $89–$169 (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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$37 across 1 record (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)
- 7 Independence PT Ste 300Greenville, SC 29615-4569Phone: (864) 522-3700
Registry dates
- Enumerated
- 2006-04-27
- Last updated
- 2022-01-27
- Certified
- 2022-01-27
Frequently asked questions
- What is Tammy Williamson's NPI number?
- Tammy Williamson's National Provider Identifier (NPI) is 1487611182, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tammy Williamson's specialty?
- Tammy Williamson is listed in the NPPES registry with a primary specialty of Certified Registered Nurse Anesthetist (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Tammy Williamson located?
- Tammy Williamson's practice location on file with NPPES is 5 Medical Park, Columbia, SC 29203.
- What is Tammy Williamson's phone number?
- The practice phone number listed in the NPPES registry for Tammy Williamson is (803) 296-2548.
- Does Tammy Williamson accept Medicare?
- Tammy Williamson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tammy Williamson's NPI active?
- Yes — Tammy Williamson's NPI (1487611182) is active in the NPPES registry as of the last update on 2022-01-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.