Lauren Williams, M.D.
NPI 1902048267 · Internal Medicine Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Lauren Williams, M.D. is a Internal Medicine Physician provider in Chicago, IL (NPI 1902048267).
Provider details
- NPI number
- 1902048267
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 036130700 (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 tenure25% of score
17 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
200 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 132 | $100 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 38 | $17 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 30 | $67 |
Typical Medicare-allowed amounts for these services range $17–$100 (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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 52 | 26 |
| Amlodipine Besylate | 41 | 17 |
| Omeprazole | 29 | — |
| Hydrochlorothiazide | 27 | 12 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 23 | 13 |
| Losartan Potassium | 23 | — |
| Metformin Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$97 across 4 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 2600 S Michigan AveChicago, IL 60616-2857Phone: (312) 492-0026
Registry dates
- Enumerated
- 2009-04-01
- Last updated
- 2023-11-06
- Certified
- 2023-11-06
Frequently asked questions
- What is Lauren Williams's NPI number?
- Lauren Williams's National Provider Identifier (NPI) is 1902048267, 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 Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Lauren Williams located?
- Lauren Williams's practice location on file with NPPES is 1801 W Taylor St Ste 3aa, Chicago, IL 60612-4795.
- What is Lauren Williams's phone number?
- The practice phone number listed in the NPPES registry for Lauren Williams is (312) 413-3627.
- 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 (1902048267) is active in the NPPES registry as of the last update on 2023-11-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.