Cassidy Obermark, O.D.
Optometrist · Sikeston, MO
Cassidy Obermark, O.D. is an optometrist with a practice address in Sikeston, Missouri, and NPI 1841546074, issued on Jul 25, 2012. Check the license (Missouri 2013021015, as entered in NPPES) with the Missouri board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Cassidy Obermark
- Credential
- O.D.
- Primary taxonomy
- Optometrist 152W00000X
- License numbers
- 2013021015 MO
2743 OK
Self-reported in NPPES; status is on the state search - Practice location
- 1250 N Main St, Sikeston, MO 63801
- Phone
- (573) 471-1080
- Enumerated
- Jul 25, 2012
- Record last updated
- Aug 19, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (573) 471-1810
- Medicare enrollment
- Enrolled (PECOS I20131113001681); accepts Medicare assignment
- Medical or professional school
- University Of Missouri St Louis - School Of Optometry, 2012
- Entity
- Type 1 · individual
8 nearest optometrist records → All 1,242 in Missouri → Look up another NPI →
Also registered at 1250 N Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Daniel Obermark, O.D.Optometrist1194709220
Verify Cassidy Obermark in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Missouri board licenses this profession
Search for license 2013021015Check 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
76 Medicare Part D claims for 29 beneficiaries, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D. Brand-name drugs were 42% of claims.
Most prescribed
- Latanoprost16 claims
- Lumigan13 claims
- Brimonidine Tartrate12 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.
Industry payments in 2024: $149.43
7 payments; by number, the most common kind was food and beverage; the largest payer was Alcon Vision LLC. The 34,453 providers of this specialty with any payment received $769.99 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Dr. Daniel R. Obermark Optometry PCPoplar Bluff, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Cassidy Obermark among 1,242 optometrist records in Missouri
Cassidy Obermark, O.D. is one of 1,242 optometrist records with a practice address in Missouri. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 67% of them.
- NPI issued2012 · 67% of these records are older, 30% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2012 · median 2007 among the 768 with a school on file
- Record last updated2013 · 67% 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 Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
6 optometrist records list a practice address in Sikeston
They are 6 of the 472 NPPES records with a practice address in Sikeston, and 1,242 optometrist records in Missouri.
All 1,242 in Missouri → Every provider in Sikeston → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Steven Barnett, O.D.Sikeston, MO 638011164506556
- Taylor Barnett, ODSikeston, MO 638011720647621
- Robert Felker, O.D.Sikeston, MO 638011881744969
- Jon Hopson, ODSikeston, MO 638011265541890
- Daniel Obermark, O.D.Sikeston, MO 638011194709220
- Amber McCormick-Gossage, O.D.Perryville, MO 637751013908938
- Steven Tilley, O.D.Perryville, MO 637751699766014
- Everett Tilley, O.D.Perryville, MO 637751952392086
Common questions
What is Cassidy Obermark, O.D.'s NPI number?
Cassidy Obermark, O.D.'s National Provider Identifier (NPI) is 1841546074, issued on Jul 25, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Cassidy Obermark, O.D. located?
The NPPES record lists a practice address at 1250 N Main St, Sikeston, MO, 63801. Phone: (573) 471-1080. Providers update this record themselves, so call before visiting.
How can I verify Cassidy Obermark, O.D.'s license?
NPPES lists Missouri license number 2013021015, as entered by the provider. Search the Missouri board that licenses this profession; the NPPES record confirms identity only.
How much does Cassidy Obermark, O.D. prescribe under Medicare Part D?
In 2024, Cassidy Obermark, O.D. had 76 Medicare Part D claims for 29 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.