Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Janet Waksmundzki Karpiak, M.D.
Pediatrics Physician in Darien, CT · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1821057761
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Dr. Janet Waksmundzki Karpiak
Credential M.D.
Sex Female
Practice address 745 Post Rd, Darien, CT, 06820
Phone (203) 655-6000
Fax (203) 655-6003
Enumeration date Mar 20, 2006
Last updated in NPPES Oct 24, 2020
Taxonomy & licenses
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 001314179 | Medicaid | CT | - |
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.
Frequently asked questions
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Janet Karpiak?
Janet Karpiak is registered in NPPES with the primary taxonomy of Pediatrics Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-10-24.