Trixie Lorraine Pei, MD
NPI 1538664669 · Nephrology Physician · Napa, CA
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Trixie Lorraine Pei, MD is a Nephrology Physician provider in Napa, CA (NPI 1538664669).
Provider details
- NPI number
- 1538664669
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
8 yrs in NPPES registry
- Profile completeness25% of score
83% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,450 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 50 Minutes99233 | 550 | $125 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 398 | $142 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 153 | $185 |
| Dialysis Services, 1 Physician Visit Per Month (20 Years Or Older)90962 | 120 | $211 |
| Dialysis Services, 2-3 Physician Visits Per Month (20 Years Or Older)90961 | 97 | $306 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 22 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 81 | 36 |
| Allopurinol | 63 | 23 |
| Losartan Potassium | 62 | 25 |
| Hydralazine Hcl | 38 | 15 |
| Calcium Acetate | 36 | 14 |
| Olmesartan Medoxomil | 32 | 11 |
| Furosemide | 30 | 17 |
| Patiromer Calcium Sorbitexbrand: Veltassa |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$728 across 28 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
- 2018-03-29
- Last updated
- 2023-07-26
- Certified
- 2023-07-26
Frequently asked questions
- What is Trixie Lorraine Pei's NPI number?
- Trixie Lorraine Pei's National Provider Identifier (NPI) is 1538664669, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Trixie Lorraine Pei's specialty?
- Trixie Lorraine Pei is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Trixie Lorraine Pei located?
- Trixie Lorraine Pei's practice location on file with NPPES is 3230 Beard Rd Ste 2537005, Napa, CA 94558-3673.
- What is Trixie Lorraine Pei's phone number?
- The practice phone number listed in the NPPES registry for Trixie Lorraine Pei is (707) 253-7005.
- Does Trixie Lorraine Pei accept Medicare?
- Trixie Lorraine Pei is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Trixie Lorraine Pei's NPI active?
- Yes — Trixie Lorraine Pei's NPI (1538664669) is active in the NPPES registry as of the last update on 2023-07-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.