Gregory Anderson, MD
NPI 1134234610 · Urology Physician · Marshfield, WI
Enrolled with Medicare as Practitioner - Urology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Anderson, MD is a Urology Physician provider in Marshfield, WI (NPI 1134234610).
Provider details
- NPI number
- 1134234610
- Entity type
- Individual
- Primary specialty
- Urology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 30349 (WI)
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
19 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
308 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 | 99 | $90 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 65 | $61 |
| Diagnostic Exam of Bladder and Urethra Using an Endoscope52000 | 46 | $72 |
| Insertion of Stent in Ureter Using an Endoscope52332 | 33 | $135 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 32 | $33 |
| Biopsy of Prostate Gland |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tamsulosin Hcl | 164 | 45 |
| Finasteride | 110 | 28 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 75 | 68 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 71 | 54 |
| Oxybutynin Chloridebrand: Oxybutynin Chloride Er | 60 | 25 |
| Imipramine Hcl | 42 | 11 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$34 across 2 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
- 2006-08-21
- Last updated
- 2022-11-17
Frequently asked questions
- What is Gregory Anderson's NPI number?
- Gregory Anderson's National Provider Identifier (NPI) is 1134234610, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Anderson's specialty?
- Gregory Anderson is listed in the NPPES registry with a primary specialty of Urology Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Anderson located?
- Gregory Anderson's practice location on file with NPPES is 1000 N Oak Ave, Marshfield, WI 54449-5777.
- What is Gregory Anderson's phone number?
- The practice phone number listed in the NPPES registry for Gregory Anderson is (715) 387-5235.
- Does Gregory Anderson accept Medicare?
- Gregory Anderson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Anderson's NPI active?
- Yes — Gregory Anderson's NPI (1134234610) is active in the NPPES registry as of the last update on 2022-11-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.