Diana Williams, M.D.
NPI 1508881905 · Emergency Medicine Physician · Berwyn, IL
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Diana Williams, M.D. is a Emergency Medicine Physician provider in Berwyn, IL (NPI 1508881905).
Provider details
- NPI number
- 1508881905
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 036-081239 (IL)
Specialties & taxonomies
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
- 2006-07-13
- Last updated
- 2020-06-12
- Certified
- 2020-06-12
Frequently asked questions
- What is Diana Williams's NPI number?
- Diana Williams's National Provider Identifier (NPI) is 1508881905, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diana Williams's specialty?
- Diana Williams is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Diana Williams located?
- Diana Williams's practice location on file with NPPES is 3249 Oak Park Ave, Berwyn, IL 60402-3429.
- What is Diana Williams's phone number?
- The practice phone number listed in the NPPES registry for Diana Williams is (708) 783-9100.
- Does Diana Williams accept Medicare?
- Diana Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Diana Williams's NPI active?
- Yes — Diana Williams's NPI (1508881905) is active in the NPPES registry as of the last update on 2020-06-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.