Tan Duong, MD
NPI 1528091642 · Internal Medicine Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tan Duong, MD is a Internal Medicine Physician provider in Chicago, IL (NPI 1528091642).
Provider details
- NPI number
- 1528091642
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036095957 (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
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
189 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 | 131 | $94 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 30 | $59 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 28 | $133 |
Typical Medicare-allowed amounts for these services range $59–$133 (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 · 46 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 246 | 77 |
| Losartan Potassium | 176 | 52 |
| Amlodipine Besylate | 167 | 53 |
| Metformin Hcl | 104 | 34 |
| Simvastatin | 103 | 28 |
| Lisinopril | 102 | 31 |
| Alendronate Sodium | 90 | 25 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-09
- Last updated
- 2008-01-23
Frequently asked questions
- What is Tan Duong's NPI number?
- Tan Duong's National Provider Identifier (NPI) is 1528091642, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tan Duong's specialty?
- Tan Duong is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Tan Duong located?
- Tan Duong's practice location on file with NPPES is 5449 N Broadway St, Chicago, IL 60640-1703.
- What is Tan Duong's phone number?
- The practice phone number listed in the NPPES registry for Tan Duong is (773) 878-4800.
- Does Tan Duong accept Medicare?
- Tan Duong is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tan Duong's NPI active?
- Yes — Tan Duong's NPI (1528091642) is active in the NPPES registry as of the last update on 2008-01-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.