Eryn Caudill, OD
Optometrist · Spearfish, SD
Eryn Caudill, OD is an optometrist with a practice address in Spearfish, South Dakota, and NPI 1225488950, issued on Jun 14, 2016. Check the license (South Dakota 728, as entered in NPPES) with the South Dakota board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Eryn Caudill
- Credential
- OD
- Primary taxonomy
- Optometrist 152W00000X
- License number
- 728 SD
Self-reported in NPPES; status is on the state search - Practice location
- 1420 North Ave, Spearfish, SD 57783
- Phone
- (605) 642-0387
- Enumerated
- Jun 14, 2016
- Record last updated
- Jun 14, 2016 (not updated in 10 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20160823000509); accepts Medicare assignment
- Medical or professional school
- Illinois College Of Optometry At Chicago, 2016
- Entity
- Type 1 · individual
8 nearest optometrist records → All 245 in South Dakota → Look up another NPI →
Also registered at 1420 North Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Tammy Hersch, O.D.Optometrist1609855980
Verify Eryn Caudill in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich South Dakota board licenses this profession
Search for license 728Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
73% fewer Medicare Part D claims than the average optometrist in 2024
74 Medicare Part D claims for 22 beneficiaries, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D. Brand-name drugs were 57% of claims.
Most prescribed
- Latanoprost27 claims
- Timolol Maleate14 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Kathryn O Haivala OD PLLCSpearfish, SD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Eryn Caudill among 245 optometrist records in South Dakota
Eryn Caudill, OD is one of 245 optometrist records with a practice address in South Dakota. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 80% of them.
- NPI issued2016 · 80% of these records are older, 18% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 75% of these records are
- Graduated2016 · median 2006 among the 183 with a school on file
- Record last updated2016 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 152W00000X and a South Dakota practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
11 optometrist records list a practice address in Spearfish
They are 11 of the 382 NPPES records with a practice address in Spearfish, and 245 optometrist records in South Dakota.
All 245 in South Dakota → Every provider in Spearfish → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Jessica Czerny, O.D.Spearfish, SD 577831457639080
- Robert Goodrich, ODSpearfish, SD 577831730133422
- Kathryn Haivala, ODSpearfish, SD 577831477564771
- A HaugeSpearfish, SD 577831982671145
- Tammy Hersch, O.D.Spearfish, SD 577831609855980
- Scott KennedySpearfish, SD 577831871561795
- Elaine Petry, O.D.Spearfish, SD 577831083296669
- Antwan Randolph, O.D.Spearfish, SD 577831568798841
Common questions
What is Eryn Caudill, OD's NPI number?
Eryn Caudill, OD's National Provider Identifier (NPI) is 1225488950, issued on Jun 14, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Eryn Caudill, OD located?
The NPPES record lists a practice address at 1420 North Ave, Spearfish, SD, 57783. Phone: (605) 642-0387. Providers update this record themselves, so call before visiting.
How can I verify Eryn Caudill, OD's license?
NPPES lists South Dakota license number 728, as entered by the provider. Search the South Dakota board that licenses this profession; the NPPES record confirms identity only.
How much does Eryn Caudill, OD prescribe under Medicare Part D?
In 2024, Eryn Caudill, OD had 74 Medicare Part D claims for 22 beneficiaries; the average among optometrist prescribers was 277. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.