Tung Nguyen, D.O.
NPI 1285679449 · Family Medicine Physician · Santa Ana, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tung Nguyen, D.O. is a Family Medicine Physician provider in Santa Ana, CA (NPI 1285679449).
Provider details
- NPI number
- 1285679449
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 20A5784 (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
20 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
160 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 88 | $98 |
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99490 | 25 | $67 |
| Insertion of Needle Into Vein (3 Years Or Older)36410 | 18 | $19 |
| Advance Care Planning, First 30 Minutes99497 | 16 | $87 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 13 | $140 |
Typical Medicare-allowed amounts for these services range $19–$140 (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 · 34 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 137 | 48 |
| Amlodipine Besylate | 132 | 42 |
| Metformin Hcl | 115 | 35 |
| Losartan Potassium | 98 | 31 |
| Lisinopril | 84 | 23 |
| Metoprolol Succinate | 73 | 19 |
| Alendronate Sodium | 70 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-19
- Last updated
- 2010-11-10
Frequently asked questions
- What is Tung Nguyen's NPI number?
- Tung Nguyen's National Provider Identifier (NPI) is 1285679449, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tung Nguyen's specialty?
- Tung Nguyen is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Tung Nguyen located?
- Tung Nguyen's practice location on file with NPPES is 2509 W 1st St, Santa Ana, CA 92703-3401.
- What is Tung Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Tung Nguyen is (714) 541-0057.
- Does Tung Nguyen accept Medicare?
- Tung Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tung Nguyen's NPI active?
- Yes — Tung Nguyen's NPI (1285679449) is active in the NPPES registry as of the last update on 2010-11-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.