Cynthia Lau, M.D.
NPI 1184882169 · Gastroenterology Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Cynthia Lau, M.D. is a Gastroenterology Physician provider in Chicago, IL (NPI 1184882169).
Provider details
- NPI number
- 1184882169
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 036-115908 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
18 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
351 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) |
|---|---|---|
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 100 | $96 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 82 | $259 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 44 | $71 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 41 | $187 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 37 | $136 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 23 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Sodium Chloride/Nahco3/Kcl/Pegbrand: Peg 3350-Electrolyte | 254 | 246 |
| Pantoprazole Sodium | 116 | 28 |
| Omeprazole | 105 | 41 |
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 86 | 86 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-C | 78 | 76 |
| Famotidine | 69 | 24 |
| Linaclotide |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$151 across 3 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)
- 17850 Kedzie AveHazel Crest, IL 60429-2058Phone: (708) 957-4011Fax: (708) 957-4013
Registry dates
- Enumerated
- 2008-05-27
- Last updated
- 2026-04-08
- Certified
- 2026-04-08
Frequently asked questions
- What is Cynthia Lau's NPI number?
- Cynthia Lau's National Provider Identifier (NPI) is 1184882169, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Cynthia Lau's specialty?
- Cynthia Lau is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Cynthia Lau located?
- Cynthia Lau's practice location on file with NPPES is 9831 S Western Ave, Chicago, IL 60643-1740.
- What is Cynthia Lau's phone number?
- The practice phone number listed in the NPPES registry for Cynthia Lau is (773) 881-5604.
- Does Cynthia Lau accept Medicare?
- Cynthia Lau is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Cynthia Lau's NPI active?
- Yes — Cynthia Lau's NPI (1184882169) is active in the NPPES registry as of the last update on 2026-04-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.