William Kasimer
NPI 1265485288 · Anatomic Pathology Physician · Weymouth, MA
Enrolled with Medicare as Practitioner - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Kasimer is a Anatomic Pathology Physician provider in Weymouth, MA (NPI 1265485288).
Provider details
- NPI number
- 1265485288
- Entity type
- Individual
- Primary specialty
- Anatomic Pathology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- 60294 (MA)
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
20 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
4,381 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) |
|---|---|---|
| Pathology Examination of Tissue Using a Microscope, Intermediate Complexity88305 | 1,217 | $39 |
| Screening Test for Antibody to Noninfectious Agent86255 | 931 | $19 |
| Special Stained Specimen Slides to Examine Tissue, Each Additional Procedure88341 | 322 | $29 |
| Cell Examination of Specimen, Selective Cellular Enhancement Technique88112 | 316 | $29 |
| Special Stain for Inclusion Bodies Or Parasites87207 | 267 | $19 |
| Pathology Examination of Tissue Using a Microscope, Moderately High Complexity88307 | 255 | $85 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$25 across 1 record (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
- 2006-05-19
- Last updated
- 2026-02-12
Frequently asked questions
- What is William Kasimer's NPI number?
- William Kasimer's National Provider Identifier (NPI) is 1265485288, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Kasimer's specialty?
- William Kasimer is listed in the NPPES registry with a primary specialty of Anatomic Pathology Physician (Allopathic & Osteopathic Physicians).
- Where is William Kasimer located?
- William Kasimer's practice location on file with NPPES is 85 Columbian St, Weymouth, MA 02190-2416.
- What is William Kasimer's phone number?
- The practice phone number listed in the NPPES registry for William Kasimer is (781) 624-8397.
- Does William Kasimer accept Medicare?
- William Kasimer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Kasimer's NPI active?
- Yes — William Kasimer's NPI (1265485288) is active in the NPPES registry as of the last update on 2026-02-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.