Alyssa Nguyen-Phuoc, M.D.
NPI 1558756734 · Emergency Medicine Physician · Orange, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alyssa Nguyen-Phuoc, M.D. is a Emergency Medicine Physician provider in Orange, CA (NPI 1558756734).
Provider details
- NPI number
- 1558756734
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 291462 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
11 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
398 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) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 119 | $196 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 91 | $135 |
| Critical Care, First 30-74 Minutes99291 | 83 | $237 |
| Emergency Department Visit With Low Level of Medical Decision Making99283 | 31 | $80 |
| Ultrasound of Heart, Follow-Up93308 | 23 | $27 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 20 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 2 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Lidocaine | 17 | — |
| Ibuprofen | 15 | 15 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$117 across 1 record (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
Additional practice locations (2)
- 4802 10th AveBrooklyn, NY 11219Phone: (718) 283-6000
- 1000 10th AveNew York, NY 10019-1147Phone: (212) 523-4000
Registry dates
- Enumerated
- 2015-04-03
- Last updated
- 2025-08-04
- Certified
- 2025-08-04
Frequently asked questions
- What is Alyssa Nguyen-Phuoc's NPI number?
- Alyssa Nguyen-Phuoc's National Provider Identifier (NPI) is 1558756734, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alyssa Nguyen-Phuoc's specialty?
- Alyssa Nguyen-Phuoc is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Alyssa Nguyen-Phuoc located?
- Alyssa Nguyen-Phuoc's practice location on file with NPPES is 101 the City Dr S, Orange, CA 92868-3201.
- What is Alyssa Nguyen-Phuoc's phone number?
- The practice phone number listed in the NPPES registry for Alyssa Nguyen-Phuoc is (714) 456-7890.
- Does Alyssa Nguyen-Phuoc accept Medicare?
- Alyssa Nguyen-Phuoc is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alyssa Nguyen-Phuoc's NPI active?
- Yes — Alyssa Nguyen-Phuoc's NPI (1558756734) is active in the NPPES registry as of the last update on 2025-08-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.