Lauren Williams, MD
NPI 1912436551 · Surgery Physician · Chicago, IL
Enrolled with Medicare as Practitioner - General Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Lauren Williams, MD is a Surgery Physician provider in Chicago, IL (NPI 1912436551).
Provider details
- NPI number
- 1912436551
- Entity type
- Individual
- Primary specialty
- Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 125070694 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
9 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
443 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 145 | $65 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 100 | $93 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 85 | $249 |
| Diagnostic Exam of Large Bowel Using a Flexible Endoscope45378 | 56 | $177 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 16 | $107 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 122 | 56 |
| Sucralfate | 52 | 26 |
| Levofloxacin | 15 | 14 |
| Famotidine | 13 | — |
| Metronidazole | 13 | 13 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 12 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2017-06-07
- Last updated
- 2017-06-07
Frequently asked questions
- What is Lauren Williams's NPI number?
- Lauren Williams's National Provider Identifier (NPI) is 1912436551, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Lauren Williams's specialty?
- Lauren Williams is listed in the NPPES registry with a primary specialty of Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Lauren Williams located?
- Lauren Williams's practice location on file with NPPES is 1650 W Harrison St, Chicago, IL 60612-3800.
- What is Lauren Williams's phone number?
- The practice phone number listed in the NPPES registry for Lauren Williams is (312) 942-5495.
- Does Lauren Williams accept Medicare?
- Lauren Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Lauren Williams's NPI active?
- Yes — Lauren Williams's NPI (1912436551) is active in the NPPES registry as of the last update on 2017-06-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.