Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Douglas A Duerstock, OD
Optometrist in Madison, IN · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1871695577
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Registry record
Entity type Individual (Type 1)
Name Douglas A Duerstock
Credential OD
Sex Male
Practice address 567 Ivy Tech Dr, Madison, IN, 47250
Phone (812) 273-6901
Fax (812) 265-3275
Enumeration date Sep 2, 2006
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses.
About the OD credential
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 NPI 1871695577 active?
Yes, as of the latest NPPES snapshot, NPI 1871695577 is active (record last updated 2007-07-08).
How do I verify Douglas Duerstock's NPI record?
Cross-check NPI 1871695577 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
Browse all → Wal-Mart Stores East Lp Community/Retail Pharmacy · Madison, IN NPI 1396762605 Wal-Mart Stores East, Lp Eyewear Supplier · Madison, IN NPI 1376626002 Douglas A. Duerstock O.D. Inc. Optometrist · Madison, IN NPI 1114258639 Andrew Rafla Pharmacist · Madison, IN NPI 1497174072 Kimberly Breeding Pharmacist · Madison, IN NPI 1326648429 Miranda Shelton Pharmacist · Madison, IN NPI 1457951220 Maggie Turner Pharmacist · Madison, IN NPI 1043979511
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.