An Nguyen, D.O.
NPI 1669729513 · Family Medicine Physician · Costa Mesa, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
An Nguyen, D.O. is a Family Medicine Physician provider in Costa Mesa, CA (NPI 1669729513).
Provider details
- NPI number
- 1669729513
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 20A12373 (CA)
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
13 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
347 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) |
|---|---|---|
| Residence Visit for Established Patient With High Level of Medical Decision Making, Per Day, If Using Time, at Least 60 Minutes99350 | 180 | $194 |
| Residence Visit for Established Patient With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 40 Minutes99349 | 63 | $133 |
| Residence Visit for New Patient With High Level of Medical Decision Making, Per Day, If Using Time, at Least 75 Minutes99345 | 59 | $211 |
| Advance Care Planning, First 30 Minutes99497 | 45 | $87 |
Typical Medicare-allowed amounts for these services range $87–$211 (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 · 115 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 283 | 57 |
| Atorvastatin Calcium | 224 | 54 |
| Trazodone Hcl | 213 | 44 |
| Quetiapine Fumarate | 212 | 36 |
| Tamsulosin Hcl | 158 | 35 |
| Furosemide | 134 | 31 |
| Amlodipine Besylate | 129 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-08-10
- Last updated
- 2022-06-14
- Certified
- 2022-06-14
Frequently asked questions
- What is An Nguyen's NPI number?
- An Nguyen's National Provider Identifier (NPI) is 1669729513, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is An Nguyen's specialty?
- An Nguyen is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is An Nguyen located?
- An Nguyen's practice location on file with NPPES is 150 Paularino Ave Ste D182, Costa Mesa, CA 92626-3302.
- What is An Nguyen's phone number?
- The practice phone number listed in the NPPES registry for An Nguyen is (949) 353-5053.
- Does An Nguyen accept Medicare?
- An Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is An Nguyen's NPI active?
- Yes — An Nguyen's NPI (1669729513) is active in the NPPES registry as of the last update on 2022-06-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.