Kathy Nguyen, FNP
NPI 1700459583 · Family Nurse Practitioner · Concord, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kathy Nguyen, FNP is a Family Nurse Practitioner provider in Concord, CA (NPI 1700459583).
Provider details
- NPI number
- 1700459583
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP
- Sex
- Female
- Sole proprietor
- No
- License
- 95017788 (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
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,917 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 439 | $93 |
| Urinalysis, Manual Test81002 | 392 | $3 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 226 | $130 |
| Ultrasound Measurement of Bladder Capacity After Voiding51798 | 172 | $15 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 123 | $113 |
| Automated Urinalysis Test81003 | 98 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 23 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tamsulosin Hcl | 452 | 218 |
| Estradiol | 178 | 109 |
| Finasteride | 151 | 72 |
| Vibegronbrand: Gemtesa | 131 | 56 |
| Ciprofloxacin Hcl | 61 | 49 |
| Nitrofurantoin Monohyd/M-Crystbrand: Nitrofurantoin Mono-Macro | 59 | 49 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 56 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$983 across 46 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
Additional practice locations (1)
- 100 N Wiget Ln Ste 290Walnut Creek, CA 94598-5901Phone: (925) 937-7740
Registry dates
- Enumerated
- 2021-07-20
- Last updated
- 2025-10-26
- Certified
- 2025-10-26
Frequently asked questions
- What is Kathy Nguyen's NPI number?
- Kathy Nguyen's National Provider Identifier (NPI) is 1700459583, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kathy Nguyen's specialty?
- Kathy Nguyen is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Kathy Nguyen located?
- Kathy Nguyen's practice location on file with NPPES is 2222 East St Ste 250, Concord, CA 94520-2096.
- What is Kathy Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Kathy Nguyen is (925) 609-7220.
- Does Kathy Nguyen accept Medicare?
- Kathy Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kathy Nguyen's NPI active?
- Yes — Kathy Nguyen's NPI (1700459583) is active in the NPPES registry as of the last update on 2025-10-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.