Katrina Williams, CRNS
NPI 1558838383 · Certified Registered Nurse Anesthetist · Madison, WI
Enrolled with Medicare as Practitioner - Certified Registered Nurse Anesthetist (crna) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Katrina Williams, CRNS is a Certified Registered Nurse Anesthetist provider in Madison, WI (NPI 1558838383).
Provider details
- NPI number
- 1558838383
- Entity type
- Individual
- Primary specialty
- Certified Registered Nurse AnesthetistPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- CRNS
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
7 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
36 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 Other Procedure on Large Bowel Using an Endoscope00811 | 25 | $61 |
| Anesthesia for Procedure for Total Knee Joint Replacement01402 | 11 | $136 |
Typical Medicare-allowed amounts for these services range $61–$136 (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
- 2018-10-30
- Last updated
- 2019-07-02
Frequently asked questions
- What is Katrina Williams's NPI number?
- Katrina Williams's National Provider Identifier (NPI) is 1558838383, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katrina Williams's specialty?
- Katrina Williams is listed in the NPPES registry with a primary specialty of Certified Registered Nurse Anesthetist (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Katrina Williams located?
- Katrina Williams's practice location on file with NPPES is 600 Highland Ave, Madison, WI 53792-0001.
- What is Katrina Williams's phone number?
- The practice phone number listed in the NPPES registry for Katrina Williams is (608) 263-6400.
- Does Katrina Williams accept Medicare?
- Katrina Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Katrina Williams's NPI active?
- Yes — Katrina Williams's NPI (1558838383) is active in the NPPES registry as of the last update on 2019-07-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.