Nancy Wu, MD
NPI 1831295997 · Internal Medicine Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nancy Wu, MD is a Internal Medicine Physician provider in Chicago, IL (NPI 1831295997).
Provider details
- NPI number
- 1831295997
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 036102625 (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
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
459 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 149 | $131 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 97 | $9 |
| 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 | 55 | $17 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 51 | $131 |
| Hemoglobin A1c Level83036 | 39 | $9 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 71 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 383 | 117 |
| Levothyroxine Sodium | 202 | 62 |
| Amlodipine Besylate | 180 | 64 |
| Lisinopril | 180 | 55 |
| Losartan Potassium | 153 | 51 |
| Metformin Hcl | 133 | 40 |
| Metoprolol Succinate |
Practice location
Mailing address
Additional practice locations (1)
- 1945 W Wilson AveFourth FloorChicago, IL 60640-5255Phone: (773) 769-4600Fax: (773) 769-6242
Registry dates
- Enumerated
- 2006-09-16
- Last updated
- 2022-09-13
- Certified
- 2022-09-13
Frequently asked questions
- What is Nancy Wu's NPI number?
- Nancy Wu's National Provider Identifier (NPI) is 1831295997, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nancy Wu's specialty?
- Nancy Wu is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Nancy Wu located?
- Nancy Wu's practice location on file with NPPES is 4025 N Western Ave, Chicago, IL 60618-3726.
- What is Nancy Wu's phone number?
- The practice phone number listed in the NPPES registry for Nancy Wu is (773) 275-7700.
- Does Nancy Wu accept Medicare?
- Nancy Wu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nancy Wu's NPI active?
- Yes — Nancy Wu's NPI (1831295997) is active in the NPPES registry as of the last update on 2022-09-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.