Gregory Larsen, M.D.
NPI 1548497860 · Urology Physician · Marrero, LA
Enrolled with Medicare as Practitioner - Urology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Larsen, M.D. is a Urology Physician provider in Marrero, LA (NPI 1548497860).
Provider details
- NPI number
- 1548497860
- Entity type
- Individual
- Primary specialty
- Urology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD.206990 (LA)
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
17 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
223 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 134 | $115 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 30 | $154 |
| Diagnostic Exam of Bladder and Urethra Using an Endoscope52000 | 23 | $197 |
| Automated Urinalysis Test81003 | 19 | $2 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 17 | $77 |
Typical Medicare-allowed amounts for these services range $2–$197 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tamsulosin Hcl | 344 | 120 |
| Mirabegronbrand: Myrbetriq | 189 | 42 |
| Solifenacin Succinate | 162 | 43 |
| Finasteride | 131 | 42 |
| Testosterone Cypionate | 58 | 14 |
| Alfuzosin Hclbrand: Alfuzosin Hcl Er | 48 | 13 |
| Vibegronbrand: Gemtesa | 36 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$640 across 11 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
- 2009-06-12
- Last updated
- 2014-11-21
Frequently asked questions
- What is Gregory Larsen's NPI number?
- Gregory Larsen's National Provider Identifier (NPI) is 1548497860, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Larsen's specialty?
- Gregory Larsen is listed in the NPPES registry with a primary specialty of Urology Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Larsen located?
- Gregory Larsen's practice location on file with NPPES is 1111 Medical Center Blvd, Marrero, LA 70072-3151.
- What is Gregory Larsen's phone number?
- The practice phone number listed in the NPPES registry for Gregory Larsen is (504) 842-4083.
- Does Gregory Larsen accept Medicare?
- Gregory Larsen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Larsen's NPI active?
- Yes — Gregory Larsen's NPI (1548497860) is active in the NPPES registry as of the last update on 2014-11-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.