An Nguyen
NPI 1609434414 · Hospitalist Physician · Irvine, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
An Nguyen is a Hospitalist Physician provider in Irvine, CA (NPI 1609434414).
Provider details
- NPI number
- 1609434414
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Sex
- Female
- Sole proprietor
- Yes
- License
- A179690 (CA)
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
7 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
204 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) |
|---|---|---|
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 82 | $178 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 60 | $81 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 48 | $131 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 14 | $119 |
Typical Medicare-allowed amounts for these services range $81–$178 (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.
Practice location
Mailing address
Additional practice locations (3)
- 26520 Cactus AveMoreno Valley, CA 92555-3927Phone: (951) 486-4000
- 1 Medical Plaza DrRoseville, CA 95661-3037Phone: (916) 781-1000
- 400 W Mineral King AveVisalia, CA 93291-6237Phone: (559) 624-2000
Registry dates
- Enumerated
- 2019-06-05
- Last updated
- 2024-07-02
- Certified
- 2024-07-02
Frequently asked questions
- What is An Nguyen's NPI number?
- An Nguyen's National Provider Identifier (NPI) is 1609434414, 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 Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is An Nguyen located?
- An Nguyen's practice location on file with NPPES is 16200 Sand Canyon Ave, Irvine, CA 92618-3714.
- What is An Nguyen's phone number?
- The practice phone number listed in the NPPES registry for An Nguyen is (888) 655-8463.
- 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 (1609434414) is active in the NPPES registry as of the last update on 2024-07-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.