Mary Nguyen, M.D.
NPI 1386811362 · Family Medicine Physician · Parker, CO
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Nguyen, M.D. is a Family Medicine Physician provider in Parker, CO (NPI 1386811362).
Provider details
- NPI number
- 1386811362
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 036122304 (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 tenure28% of score
18 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
827 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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 221 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 170 | $80 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 148 | $67 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 117 | $56 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 50 | $128 |
| Administration of Influenza Virus VaccineG0008 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 69 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 294 | 85 |
| Levothyroxine Sodium | 162 | 47 |
| Amlodipine Besylate | 99 | 34 |
| Lisinopril | 95 | 30 |
| Tamsulosin Hcl | 78 | 25 |
| Rosuvastatin Calcium | 68 | 25 |
| Metformin Hcl |
Practice location
Mailing address
Additional practice locations (2)
- 1901 W Galena BlvdAurora, IL 60506-4305Phone: (630) 692-5960Fax: (630) 692-5961
- 4789 Route 71Oswego, IL 60543-7415Phone: (630) 692-5730Fax: (630) 692-5731
Registry dates
- Enumerated
- 2008-05-09
- Last updated
- 2021-06-21
- Certified
- 2021-06-21
Frequently asked questions
- What is Mary Nguyen's NPI number?
- Mary Nguyen's National Provider Identifier (NPI) is 1386811362, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Nguyen's specialty?
- Mary Nguyen is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Nguyen located?
- Mary Nguyen's practice location on file with NPPES is 19964 Hilltop Rd Ste a, Parker, CO 80134-7316.
- What is Mary Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Mary Nguyen is (303) 841-2212.
- Does Mary Nguyen accept Medicare?
- Mary Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Nguyen's NPI active?
- Yes — Mary Nguyen's NPI (1386811362) is active in the NPPES registry as of the last update on 2021-06-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.