Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Lester P Mietkiewicz, MD
Internal Medicine Physician in Worcester, MA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1285609479
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Registry record
Taxonomy & licenses
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 042472266 | Other | - | ONE HEALTH PLAN |
| 4034906 | Other | - | AETNA US HEALTHCARE |
| 8239846 | Other | - | CIGNA HEALTH PLAN |
| J02901 | Other | - | BLUE SHIELD INDEMNITY |
| 0400875 | Other | - | EVERCARE |
| 28035 | Other | - | HEALTHY START |
| 9900029 | Other | - | FALLON COMMUNITY HEALTH |
| AA1293 | Other | - | HARVARD PILGRIM HEALTHCAR |
| J02901 | Other | - | BLUE CARE ELECT |
| 28035 | Other | - | CHILDRENS MEDICAL |
| 043058466 | Other | - | HEALTHCARE VALUE MANAGEME |
| J02901 | Other | - | BLUE SHIELD HMO BLUE |
| 784252 | Other | - | MVP HEALTH CARE |
| 934972 | Other | - | FIRST HEALTH |
| 042472266 | Other | - | THREE RIVERS |
| 042472266 | Other | - | PRIVATE HEALTHCARE |
| 6180493 | Medicaid | MA | - |
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
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Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-08-03.