Gia Nguyen
NPI 1528741691 · Physician Assistant · Garden Grove, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gia Nguyen is a Physician Assistant provider in Garden Grove, CA (NPI 1528741691).
Provider details
- NPI number
- 1528741691
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Female
- Sole proprietor
- Yes
- License
- PA64149 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
2 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
308 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 151 | $118 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 59 | $13 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 48 | $84 |
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99490 | 35 | $57 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 15 | $9 |
Typical Medicare-allowed amounts for these services range $9–$118 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$321 across 18 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2023-08-07
- Last updated
- 2024-03-01
- Certified
- 2024-03-01
Frequently asked questions
- What is Gia Nguyen's NPI number?
- Gia Nguyen's National Provider Identifier (NPI) is 1528741691, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gia Nguyen's specialty?
- Gia Nguyen is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Gia Nguyen located?
- Gia Nguyen's practice location on file with NPPES is 12865 Main St Ste 105, Garden Grove, CA 92840-8205.
- What is Gia Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Gia Nguyen is (800) 560-9999.
- Does Gia Nguyen accept Medicare?
- Gia Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gia Nguyen's NPI active?
- Yes — Gia Nguyen's NPI (1528741691) is active in the NPPES registry as of the last update on 2024-03-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.