Sunita Williamson, M.D.
NPI 1275550865 · Emergency Medicine Physician · Buffalo Grove, IL
Enrolled with Medicare as Order and Referring Only - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sunita Williamson, M.D. is a Emergency Medicine Physician provider in Buffalo Grove, IL (NPI 1275550865).
Provider details
- NPI number
- 1275550865
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 036092491 (IL)
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 tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-17
- Last updated
- 2021-05-04
- Certified
- 2021-05-04
Frequently asked questions
- What is Sunita Williamson's NPI number?
- Sunita Williamson's National Provider Identifier (NPI) is 1275550865, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sunita Williamson's specialty?
- Sunita Williamson is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Sunita Williamson located?
- Sunita Williamson's practice location on file with NPPES is 150 W Half Day Rd, Buffalo Grove, IL 60089-6591.
- What is Sunita Williamson's phone number?
- The practice phone number listed in the NPPES registry for Sunita Williamson is (847) 215-0000.
- Does Sunita Williamson accept Medicare?
- Sunita Williamson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sunita Williamson's NPI active?
- Yes — Sunita Williamson's NPI (1275550865) is active in the NPPES registry as of the last update on 2021-05-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.