Huyen Mai, RN
NPI 1801558739 · Psychiatric/Mental Health Nurse Practitioner · Costa Mesa, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Huyen Mai, RN is a Psychiatric/Mental Health Nurse Practitioner provider in Costa Mesa, CA (NPI 1801558739).
Provider details
- NPI number
- 1801558739
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- RN
- Sex
- Female
- Sole proprietor
- No
- License
- 95025176 (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
4 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
2,091 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) |
|---|---|---|
| Psychotherapy With Evaluation and Management Visit, 30 Minutes90833 | 488 | $64 |
| Residence Visit for Established Patient With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 40 Minutes99349 | 469 | $113 |
| Residence Visit for Established Patient With Low Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99348 | 421 | $68 |
| Residence Visit for Established Patient With High Level of Medical Decision Making, Per Day, If Using Time, at Least 60 Minutes99350 | 217 | $164 |
| Psychotherapy With Evaluation and Management Visit, 45 Minutes90836 | 137 | $81 |
| Psychiatric Diagnostic Evaluation With Medical Services90792 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 24 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Quetiapine Fumarate | 487 | 99 |
| Divalproex Sodium | 207 | 50 |
| Trazodone Hcl | 154 | 36 |
| Olanzapine | 118 | 22 |
| Buspirone Hcl | 108 | 20 |
| Sertraline Hcl | 104 | 27 |
| Mirtazapine | 104 | 23 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$407 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
- 2021-10-07
- Last updated
- 2023-07-10
- Certified
- 2023-07-10
Frequently asked questions
- What is Huyen Mai's NPI number?
- Huyen Mai's National Provider Identifier (NPI) is 1801558739, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Huyen Mai's specialty?
- Huyen Mai is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Huyen Mai located?
- Huyen Mai's practice location on file with NPPES is 301 Victoria St, Costa Mesa, CA 92627-1995.
- What is Huyen Mai's phone number?
- The practice phone number listed in the NPPES registry for Huyen Mai is (949) 574-3316.
- Does Huyen Mai accept Medicare?
- Huyen Mai is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Huyen Mai's NPI active?
- Yes — Huyen Mai's NPI (1801558739) is active in the NPPES registry as of the last update on 2023-07-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.