Sonja O'Sullivan, CRNA
NPI 1518324037 · Certified Registered Nurse Anesthetist · Knoxville, TN
Enrolled with Medicare as Practitioner - Certified Registered Nurse Anesthetist (crna) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sonja O'Sullivan, CRNA is a Certified Registered Nurse Anesthetist provider in Knoxville, TN (NPI 1518324037).
Provider details
- NPI number
- 1518324037
- Entity type
- Individual
- Primary specialty
- Certified Registered Nurse AnesthetistPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- CRNA
- Sex
- Female
- Sole proprietor
- No
- License
- 107689 (CT)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
10 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
29 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) |
|---|---|---|
| Anesthesia for Procedure for Total Knee Joint Replacement01402 | 15 | $187 |
| Anesthesia for Extensive Surgery on Spine00670 | 14 | $369 |
Typical Medicare-allowed amounts for these services range $187–$369 (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
Additional practice locations (1)
- 99 E River Dr5th FloorEast Hartford, CT 06108-3288Phone: (860) 282-4128Fax: (860) 289-0746
Registry dates
- Enumerated
- 2016-01-28
- Last updated
- 2018-08-30
Frequently asked questions
- What is Sonja O'Sullivan's NPI number?
- Sonja O'Sullivan's National Provider Identifier (NPI) is 1518324037, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sonja O'Sullivan's specialty?
- Sonja O'Sullivan is listed in the NPPES registry with a primary specialty of Certified Registered Nurse Anesthetist (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Sonja O'Sullivan located?
- Sonja O'Sullivan's practice location on file with NPPES is 1901 Clinch Ave, Knoxville, TN 37916-2307.
- What is Sonja O'Sullivan's phone number?
- The practice phone number listed in the NPPES registry for Sonja O'Sullivan is (865) 541-1111.
- Does Sonja O'Sullivan accept Medicare?
- Sonja O'Sullivan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sonja O'Sullivan's NPI active?
- Yes — Sonja O'Sullivan's NPI (1518324037) is active in the NPPES registry as of the last update on 2018-08-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.