Quynh Nguyen, MD
NPI 1134615636 · Internal Medicine Physician · Chicago, IL
Enrolled with Medicare as Order and Referring Only - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Quynh Nguyen, MD is a Internal Medicine Physician provider in Chicago, IL (NPI 1134615636).
Provider details
- NPI number
- 1134615636
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- 125.071610 (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
7 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
562 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 297 | $118 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 104 | $112 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 84 | $171 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 77 | $77 |
Typical Medicare-allowed amounts for these services range $77–$171 (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 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Metoprolol Succinate | 34 | 24 |
| Isosorbide Mononitratebrand: Isosorbide Mononitrate Er | 34 | 24 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 33 | 31 |
| Prednisone | 23 | 21 |
| Doxycycline Hyclate | 22 | 20 |
| Furosemide | 22 | 18 |
| Pantoprazole Sodium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2018-07-08
- Last updated
- 2018-07-08
Frequently asked questions
- What is Quynh Nguyen's NPI number?
- Quynh Nguyen's National Provider Identifier (NPI) is 1134615636, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Quynh Nguyen's specialty?
- Quynh Nguyen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Quynh Nguyen located?
- Quynh Nguyen's practice location on file with NPPES is 4646 N Marine Dr, Chicago, IL 60640-5759.
- What is Quynh Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Quynh Nguyen is (773) 878-8700.
- Does Quynh Nguyen accept Medicare?
- Quynh Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Quynh Nguyen's NPI active?
- Yes — Quynh Nguyen's NPI (1134615636) is active in the NPPES registry as of the last update on 2018-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.