Elizabeth Nghiem, M.D.
NPI 1083626212 · Infectious Disease Physician · Fountain Valley, CA
Enrolled with Medicare as Practitioner - Infectious Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Elizabeth Nghiem, M.D. is a Infectious Disease Physician provider in Fountain Valley, CA (NPI 1083626212).
Provider details
- NPI number
- 1083626212
- Entity type
- Individual
- Primary specialty
- Infectious Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- A62911 (CA)
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
19 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
5,894 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 4,201 | $81 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 885 | $114 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 384 | $179 |
| Critical Care, First 30-74 Minutes99291 | 126 | $217 |
| Initial Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 35 Minutes99305 | 106 | $140 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ertapenem Sodiumbrand: Ertapenem | 31 | — |
| Tobramycin Sulfate | 23 | — |
| Fluconazole | 18 | 11 |
| Ceftriaxone Sodiumbrand: Ceftriaxone | 17 | — |
| 0.9 % Sodium Chloridebrand: Sodium Chloride | 15 | — |
| Cephalexin | 13 | — |
| Piperacillin Sodium/Tazobactambrand: Piperacillin-Tazobactam | 13 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$266 across 4 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
- 2006-08-13
- Last updated
- 2007-07-08
Frequently asked questions
- What is Elizabeth Nghiem's NPI number?
- Elizabeth Nghiem's National Provider Identifier (NPI) is 1083626212, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Elizabeth Nghiem's specialty?
- Elizabeth Nghiem is listed in the NPPES registry with a primary specialty of Infectious Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Elizabeth Nghiem located?
- Elizabeth Nghiem's practice location on file with NPPES is 11160 Warner Ave, Fountain Valley, CA 92708-4008.
- What is Elizabeth Nghiem's phone number?
- The practice phone number listed in the NPPES registry for Elizabeth Nghiem is (714) 751-7002.
- Does Elizabeth Nghiem accept Medicare?
- Elizabeth Nghiem is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Elizabeth Nghiem's NPI active?
- Yes — Elizabeth Nghiem's NPI (1083626212) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.