Dr. Justin J. Grassmeyer, MD
- Part D claims, 2024
- 96
- Hospital affiliations
- 2
- Industry payments
- $168
- Medical group
- 1
- State license
- 1
- Practice address
- 200 Hawkins Drive, Iowa City, IA 52242
- Practice phone
- Call (319) 356-1616
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Grassmeyer's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Justin J. Grassmeyer is a retina specialist (ophthalmology) physician in Iowa City, Iowa
Dr. Grassmeyer practices at University of Iowa Health Care Medical Center in Iowa City, Iowa, part of The University of Iowa.
Dr. Grassmeyer's NPI, 1780262675, was assigned on March 31, 2021. Dr. Grassmeyer graduated from University of Nebraska College of Medicine in 2021. Dr. Grassmeyer holds Iowa license MD-54563.
- NPI
- 1780262675NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0547664724
- NPI enumeration date
- March 31, 2021
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (319) 356-1616
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 31
- Medical school graduation
- 2021
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Justin J. Grassmeyer practices at University of Iowa Health Care Medical Center in Iowa City, Iowa
Dr. Grassmeyer's primary practice is University of Iowa Health Care Medical Center, at 200 Hawkins Drive, Iowa City, IA 52242 in Johnson County. The practice phone is (319) 356-1616.
- University of Iowa Health Care Medical Center200 Hawkins Drive, Iowa City, IA 52242 · Johnson CountyPhone(319) 356-1616
Source: Dmand AI Affiliation Data
Dr. Justin J. Grassmeyer is affiliated with 2 sites of care and 1 medical group
Dr. Grassmeyer's primary practice is University of Iowa Health Care Medical Center in Iowa City, Iowa, part of The University of Iowa. Dr. Grassmeyer is also affiliated with Southeast Iowa Regional Medical Center, West Burlington. The medical group on file is Scanlan Center for School Mental Health Clinic.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Justin J. Grassmeyer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Grassmeyer practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| University of Iowa Health Care Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across The University of Iowa and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Justin J. Grassmeyer is one of 8 retina specialist (ophthalmology) physicians in Iowa
Retina specialist is Dr. Grassmeyer's primary specialty in the NPI Registry, under taxonomy code 207WX0107X. Dr. Grassmeyer is licensed in Iowa.
Specialties and state licenses
- Retina specialist (ophthalmology), IowaPrimary
Retina specialist (ophthalmology) physicians near Dr. Grassmeyer
Counts of retina specialist (ophthalmology) physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Justin J. Grassmeyer's patients have a median age of 76
Across all payers, Dmand AI patient panel data puts Dr. Grassmeyer's median patient age at 76, with 57% women.
Dr. Grassmeyer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 76
Patient panel by sex, all payers
- Women57%
- Men42%
Source: Dmand AI Patient Panel Data
Dr. Justin J. Grassmeyer wrote 96 Medicare Part D claims in 2024
In 2024, Dr. Grassmeyer wrote 96 Medicare Part D claims for 43 patients. 55% of them were for generic drugs. CMS names the drug for 24 of them, across 1 drug with 11 or more claims each, at $1,126 in total drug cost.
Dr. Grassmeyer's Part D claims by kind of drug, 2024
- Generic53 claims55%
- Brand-name43 claims45%
Dr. Grassmeyer's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Justin J. Grassmeyer takes part in Medicare
Dr. Grassmeyer accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Justin J. Grassmeyer received $168 in industry payments from 2024 to 2025
CMS Open Payments shows 4 general payments to Dr. Grassmeyer from 1 drug or device company from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. Alcon Laboratories Inc paid the most, $168.
General payments to Dr. Grassmeyer by program year, 2024 to 2025
Companies that paid Dr. Grassmeyer the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Justin J. Grassmeyer graduated from University of Nebraska College of Medicine
Dr. Grassmeyer graduated from University of Nebraska College of Medicine in 2021.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Justin J. Grassmeyer's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Justin J. Grassmeyer
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Justin J. Grassmeyer's NPI number?
Dr. Justin J. Grassmeyer's NPI number is 1780262675. It was assigned on March 31, 2021, and it is active in the NPI Registry.
What kind of doctor is Dr. Justin J. Grassmeyer?
Dr. Justin J. Grassmeyer is a retina specialist (ophthalmology) physician in Iowa City, Iowa. The primary specialty in the NPI Registry is Retina Specialist (Ophthalmology) Physician (taxonomy code 207WX0107X).
Where does Dr. Justin J. Grassmeyer practice?
Dr. Grassmeyer practices at 200 Hawkins Drive, Iowa City, IA 52242. Dr. Grassmeyer's primary practice is University of Iowa Health Care Medical Center in Iowa City, Iowa, part of The University of Iowa.
What is Dr. Justin J. Grassmeyer's office phone number?
The practice phone on file for Dr. Grassmeyer is (319) 356-1616.
What is Dr. Justin J. Grassmeyer's medical license number?
Dr. Grassmeyer holds Iowa license MD-54563.
Which hospitals is Dr. Justin J. Grassmeyer affiliated with?
Dr. Grassmeyer practices at University of Iowa Health Care Medical Center in Iowa City, Iowa. Dr. Grassmeyer is also affiliated with Southeast Iowa Regional Medical Center, West Burlington.
What medical group is Dr. Justin J. Grassmeyer part of?
Dr. Grassmeyer is linked to Scanlan Center for School Mental Health Clinic.
Does Dr. Justin J. Grassmeyer accept Medicare?
Yes. CMS lists Dr. Grassmeyer as accepting Medicare assignment.
Where did Dr. Justin J. Grassmeyer go to medical school?
Dr. Grassmeyer graduated from University of Nebraska College of Medicine in 2021.
What drugs does Dr. Justin J. Grassmeyer prescribe most?
In 2024 Medicare Part D data, Dr. Grassmeyer's most prescribed drugs by claims were Prednisolone Acetate.
Has Dr. Justin J. Grassmeyer received payments from drug or device companies?
CMS Open Payments shows $168 in general payments to Dr. Grassmeyer from 1 company from 2024 to 2025. The largest total came from Alcon Laboratories Inc.
How long has Dr. Justin J. Grassmeyer been practicing?
Dr. Grassmeyer graduated from medical school in 2021, 5 years ago.
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