William Merriam, M.D.
NPI 1912043258 · Urology Physician · West Chester, PA
Enrolled with Medicare as Practitioner - Urology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Merriam, M.D. is a Urology Physician provider in West Chester, PA (NPI 1912043258).
Provider details
- NPI number
- 1912043258
- Entity type
- Individual
- Primary specialty
- Urology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD427453 (PA)
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
4,849 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) |
|---|---|---|
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 1,089 | $18 |
| Automated Urinalysis Test81003 | 650 | $2 |
| Ultrasound Measurement of Bladder Capacity After Voiding51798 | 640 | $12 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 621 | $138 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 569 | $99 |
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 24 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tamsulosin Hcl | 857 | 252 |
| Finasteride | 433 | 131 |
| Relugolixbrand: Orgovyx | 162 | 27 |
| Silodosin | 123 | 34 |
| Alfuzosin Hclbrand: Alfuzosin Hcl Er | 86 | 26 |
| Enzalutamidebrand: Xtandi | 79 | 11 |
| Mirabegronbrand: Myrbetriq | 68 | 20 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,834 across 58 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
- 2007-01-30
- Last updated
- 2011-10-21
Frequently asked questions
- What is William Merriam's NPI number?
- William Merriam's National Provider Identifier (NPI) is 1912043258, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Merriam's specialty?
- William Merriam is listed in the NPPES registry with a primary specialty of Urology Physician (Allopathic & Osteopathic Physicians).
- Where is William Merriam located?
- William Merriam's practice location on file with NPPES is 915 Old Fern Hill Rd, West Chester, PA 19380-4269.
- What is William Merriam's phone number?
- The practice phone number listed in the NPPES registry for William Merriam is (610) 692-4270.
- Does William Merriam accept Medicare?
- William Merriam is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Merriam's NPI active?
- Yes — William Merriam's NPI (1912043258) is active in the NPPES registry as of the last update on 2011-10-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.