Gregory Larrieux
NPI 1699118174 · Transplant Surgery Physician · Milwaukee, WI
Enrolled with Medicare as Practitioner - General Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Larrieux is a Transplant Surgery Physician provider in Milwaukee, WI (NPI 1699118174).
Provider details
- NPI number
- 1699118174
- Entity type
- Individual
- Primary specialty
- Transplant Surgery PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- MD2021-0736 (NM)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
13 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
168 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 | 79 | $114 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 54 | $138 |
| Simple Removal of Foreign Body, Stone, Or Stent in Urethra Or Bladder Using an Endoscope52310 | 13 | $140 |
| Transplantation of Donor Kidney50360 | 11 | $2,381 |
| Insertion of Stent in Ureter50605 | 11 | $492 |
Typical Medicare-allowed amounts for these services range $114–$2,381 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 22 | — |
| Valganciclovir Hcl | 19 | — |
| Amlodipine Besylate | 18 | — |
| Carvedilol | 16 | — |
| Pen Needle, Diabeticbrand: Nano 2nd Gen Pen Needle | 15 | — |
| Oxycodone Hcl | 14 | 13 |
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 , 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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-04-15
- Last updated
- 2021-07-20
- Certified
- 2021-07-20
Frequently asked questions
- What is Gregory Larrieux's NPI number?
- Gregory Larrieux's National Provider Identifier (NPI) is 1699118174, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Larrieux's specialty?
- Gregory Larrieux is listed in the NPPES registry with a primary specialty of Transplant Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Larrieux located?
- Gregory Larrieux's practice location on file with NPPES is 9200 W Wisconsin Ave, Milwaukee, WI 53226-3522.
- What is Gregory Larrieux's phone number?
- The practice phone number listed in the NPPES registry for Gregory Larrieux is (414) 805-8632.
- Does Gregory Larrieux accept Medicare?
- Gregory Larrieux is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Larrieux's NPI active?
- Yes — Gregory Larrieux's NPI (1699118174) is active in the NPPES registry as of the last update on 2021-07-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.