Justin Grassmeyer, MD
Retina Specialist (Ophthalmology) Physician · Iowa City, IA
Justin Grassmeyer, MD is a retina specialist (ophthalmology) physician with a practice address in Iowa City, Iowa, and NPI 1780262675, issued on Mar 31, 2021. Check the license (Iowa MD-54563, as entered in NPPES) on the Iowa Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Justin Grassmeyer
- Credential
- MD
- Primary taxonomy
- Retina Specialist (Ophthalmology) Physician 207WX0107X
- License number
- MD-54563 IA
Self-reported in NPPES; status is on the state search - Practice location
- 200 Hawkins Dr, Iowa City, IA 52242
- Phone
- (319) 356-3705
- Enumerated
- Mar 31, 2021
- Record last updated
- Jul 8, 2025
- Fax
- (319) 353-6030
- Medicare enrollment
- Enrolled (PECOS I20250710000292); accepts Medicare assignment
- Medical or professional school
- University Of Nebraska College Of Medicine, 2021
- Entity
- Type 1 · individual
Also registered at 200 Hawkins Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Justin Grassmeyer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIowa Board of Medicine
Search for license MD-54563Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% fewer Medicare Part D claims than the average retina specialist (ophthalmology) physician in 2024
96 Medicare Part D claims for 43 beneficiaries, against an average of 620 among the 1,449 providers of this specialty who prescribed in Part D. Brand-name drugs were 45% of claims.
Most prescribed
- Prednisolone Acetate24 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: $102.22
2 payments; by number, the most common kind was food and beverage; the largest payer was Alcon Vision LLC. The 1,253 providers of this specialty with any payment received $7,667.49 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
- State University OF IowaIowa City, IA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Retina Specialist (Ophthalmology) Physician providers in Iowa
There are 11 retina specialist (ophthalmology) physician records in Iowa.
Other retina specialist (ophthalmology) physician records in Iowa
- Riley Bylund, MDWest Des Moines, IA1336791045
- Cory Christensen, DO, MPHWest Des Moines, IA1952044877
- Beau Fenner, MDIowa City, IA1861124943
- Christopher Haupert, MDWest Des Moines, IA1780652800
- David Massop, MDDes Moines, IA1003267956
- Mohammad Sabbagh, MDSioux City, IA1386201549
- James Singer, DOWest Des Moines, IA1427369107
- Austin Strohbehn, MDWest Des Moines, IA1629482468
- Samuel Tadros, MDIowa City, IA1326786005
- Sushant Wagley, MDWest Des Moines, IA1225481351
Common questions
What is Justin Grassmeyer, MD's NPI number?
Justin Grassmeyer, MD's National Provider Identifier (NPI) is 1780262675, issued on Mar 31, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Justin Grassmeyer, MD located?
The NPPES record lists a practice address at 200 Hawkins Dr, Iowa City, IA, 52242. Phone: (319) 356-3705. Providers update this record themselves, so call before visiting.
How can I verify Justin Grassmeyer, MD's license?
NPPES lists Iowa license number MD-54563, as entered by the provider. Search the Iowa Board of Medicine at https://dial.iowa.gov/about-dial/boards-and-commissions/medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Justin Grassmeyer, MD prescribe under Medicare Part D?
In 2024, Justin Grassmeyer, MD had 96 Medicare Part D claims for 43 beneficiaries; the average among retina specialist (ophthalmology) physician prescribers was 620. 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.