Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Gregory A Caldwell, O.D.
Optometrist in Duncansville, PA · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1205827912
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Registry record
Entity type Individual (Type 1)
Name Gregory A Caldwell
Credential O.D.
Sex Male
Practice address 108 Olde Farm Office Rd, Duncansville, PA, 16635
Phone (814) 695-3141
Fax (814) 696-4780
Enumeration date Nov 2, 2005
Last updated in NPPES Feb 12, 2010
Taxonomy & licenses
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 |
|---|---|---|---|
| 410031702 | Other | - | RR MEDICARE INDIVIDUAL |
| 0016242600017 | Medicaid | PA | - |
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
What is the NPI number for Gregory Caldwell?
The National Provider Identifier (NPI) for Gregory Caldwell is 1205827912, a Type 1 (individual) record in the CMS NPPES registry.
Where does Gregory Caldwell practice?
The practice location on file with NPPES is in Duncansville, PA. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → Ryan D Imler Od PC Optometrist · Duncansville, PA NPI 1679517957 Richard Centar Optometrist · Duncansville, PA NPI 1285679282 Ryan Imler Optometrist · Duncansville, PA NPI 1215972146 Hering Professionals of America LLC Hearing Aid Equipment · Duncansville, PA NPI 1679847099 Richard Centar Od, Ryan Imler Od, PC Optometrist · Duncansville, PA NPI 1619353646 Ryan Centar Optometrist · Duncansville, PA NPI 1396101440 Lindsay Corle Optometrist · Duncansville, PA NPI 1689356867
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-02-12.