Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Christopher A Karalekas, O.D.
Optometrist in Lowell, MA · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1043212087
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Registry record
Entity type Individual (Type 1)
Name Christopher A Karalekas
Credential O.D.
Sex Male
Practice address 850 Chelmsford St, Lowell, MA, 01851
Phone (978) 452-0127
Fax (978) 452-1749
Enumeration date Aug 10, 2005
Last updated in NPPES Sep 19, 2012
Taxonomy & licenses
152WL0500X Low Vision Rehabilitation Optometrist Eye and Vision Services Providers · License 3863 (MA) Secondary
152WC0802X Corneal and Contact Management Optometrist Eye and Vision Services Providers · License 3863 (MA) Secondary
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses.
About the OD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 31932 | Other | MA | FALLON HEALTH PLAN |
| 365495 | Other | MA | HEALTH SOURCE MASS |
| 980956 | Other | MA | NETWORK HEALTH |
| 0006473 | Other | MA | NEIGHBORHOOD HEALTH PLAN |
| 0369365 | Medicaid | MA | - |
| 151430 | Other | MA | HARVARD COMMUNITY HP |
| 21613 | Other | NH | ANTHEM BC/BS |
| 7625 | Other | MA | DAVIS VISION |
| B20884301 | Other | - | CIGNA |
| W16129 | Other | MA | HMOBLUE/MASS. |
| W16129 | Other | MA | BC/BS OF MASS. |
| 042489265 | Other | MA | PHCS |
| W20210 | Other | MA | BC/BS INDEMINITY |
| 759053 | Other | MA | TUFTS HEALTH PLAN |
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
Where does Christopher Karalekas practice?
The practice location on file with NPPES is in Lowell, MA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Christopher Karalekas?
The National Provider Identifier (NPI) for Christopher Karalekas is 1043212087, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all → Stephen Harney Optometrist · Lowell, MA NPI 1124029269 Steven Sikalis Optometrist · Lowell, MA NPI 1427034263 Eduard Peysakhov Dentist · Lowell, MA NPI 1265461107 Beaudette Home Medical Supply, Inc. Durable Medical Equipment & Medical Supplies · Lowell, MA NPI 1336270974 Cross Point Family Dental, P.C. Dental Clinic/Center · Lowell, MA NPI 1184807380 Sikalis Eye Associates Optometrist · Lowell, MA NPI 1114179223 Advanced Eye Care Associates Optometrist · Lowell, MA NPI 1689902314
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-09-19.