Dr. Ryan John Diel, MD
- Medicare services, 2024
- 1,141
- Medicare patients, 2024
- 475
- Part D claims, 2024
- 490
- Publications
- 12
- MIPS score, 2024
- 88
- 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
Find Dr. Diel'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. Ryan John Diel is an ophthalmologist in Iowa City, Iowa
Dr. Diel practices at University of Iowa Health Care Medical Center in Iowa City, Iowa, part of The University of Iowa.
Dr. Diel's NPI, 1972000164, was assigned on April 12, 2018. Dr. Diel graduated from University of Miami, Lm Miller School of Medicine in 2018. Dr. Diel holds Iowa license MD-52218.
- NPI
- 1972000164NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9638428170
- NPI enumeration date
- April 12, 2018
- 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
- 34
- Medical school graduation
- 2018
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ryan John Diel practices at University of Iowa Health Care Medical Center in Iowa City, Iowa
Dr. Diel'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. Ryan John Diel is affiliated with 1 site of care and 2 medical groups
Dr. Diel's primary practice is University of Iowa Health Care Medical Center in Iowa City, Iowa, part of The University of Iowa. The medical group on file is Scanlan Center for School Mental Health Clinic. Dmand AI also links Dr. Diel to 1 more medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Ryan John Diel's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Diel practices. 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 medical group | 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. Ryan John Diel is one of 180 ophthalmologists in Iowa
Ophthalmology is Dr. Diel's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dmand AI has Dr. Diel's licenses on file in 2 states: Iowa and Nevada.
Specialties and state licenses
- Ophthalmology, IowaPrimary
- Nevada license
Ophthalmologists near Dr. Diel
Counts of ophthalmologists 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. Ryan John Diel billed Medicare for 1,141 services in 2024
CMS data shows 1,141 Medicare services from Dr. Diel across 14 procedure codes in 2024, for 475 Medicare patients. Medicare paid $100,825 for them.
Dr. Diel's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 5402024: 66022%
- Office and hospital visits
- 2023: 5292024: 27448%
- Surgery
- 2023: 1152024: 18258%
- Imaging
- 2023: 02024: 25
Where Dr. Diel's Medicare services took place, 2024
- In an office39835%
- In a facility74365%
Dr. Diel compared with the Iowa median for ophthalmologists, 2024
- Dr. Diel
- Iowa median
- Medicare services
- 1,141vs 1,79236% below
- Medicare patients
- 475vs 66929% below
- Part D claims
- 434vs 39610% above
Medians across 183 ophthalmologists in Iowa with Dmand AI profiles that report each measure.
Dr. Diel's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Diel?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Diel and other ophthalmologists in Iowa.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ryan John Diel treated 475 Medicare patients in 2024, average age 75
CMS counts 475 Medicare patients who saw Dr. Diel in 2024. The largest group is 65 to 74, with 210 patients. 66% of them have high blood pressure, and 61% have high cholesterol. 8% are also on Medicaid. Their average risk score is 1.12, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Diel's median patient age at 75, with 58% women.
Dr. Diel's Medicare patients by age, 2024
Dr. Diel's Medicare patients by sex, 2024
- Women27859%
- Men19741%
Chronic conditions among Dr. Diel's Medicare patients, 2024
- High blood pressure66%
- High cholesterol61%
- Arthritis39%
- Diabetes26%
- Mood disorders24%
- Depression21%
- Anxiety20%
- Chronic kidney disease19%
Share of Medicare patients with each condition. A patient can have several.
Dr. Diel's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women58%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ryan John Diel wrote 490 Medicare Part D claims in 2024
In 2024, Dr. Diel wrote 490 Medicare Part D claims for 227 patients. 39% of them were for generic drugs. CMS names the drug for 434 of them, across 6 drugs with 11 or more claims each, at $16,136 in total drug cost. In 2023, CMS named 988 claims across 10 drugs.
Dr. Diel's Part D claims by kind of drug, 2024
- Generic190 claims39%
- Brand-name300 claims61%
Dr. Diel'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 9882024: 43456%
Drugs named by CMS: 6 in 2024, 10 in 2023.
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
Dr. Ryan John Diel scored 88 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 88 out of 100 for Dr. Diel for performance year 2024, reported as part of a group. Dr. Diel accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 291 procedures of cataract surgery by Dr. Diel, more than 89% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. Diel's MIPS scores, performance year 2024
- 88of 100Final score
- 86.9of 100Quality
- 40of 100Improvement Activities
- 78of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Diel ranks in Medicare procedure volume
- Cataract surgery
- 89th percentile291 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Ryan John Diel has 12 publications on record
Dmand AI links 12 papers to Dr. Diel, published from 2017 to 2025. 2020 was the busiest year, with 3. The most frequent topics are Dry Eye Syndromes and Migraine Disorders. Dr. Diel has published most often in Br J Ophthalmol. Dr. Diel's most frequent co-authors are Anat Galor, MD, Roy Clifford Levitt, MD and Pavlina S. Kemp, MD.
Dr. Diel's papers by year, 2017 to 2025
Topics Dr. Diel writes about most
- Dry Eye Syndromes
- Migraine Disorders
Dr. Diel's most frequent co-authors
- Anat Galor, MD5 shared papers
- Roy Clifford Levitt, MD4 shared papers
- Pavlina S. Kemp, MD3 shared papers
Recent publications by Dr. Diel
Digit J Ophthalmol
See who Dr. Diel researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Diel works with, so you can find a warm path to the right ophthalmologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Ryan John Diel received $879 in industry payments from 2022 to 2023
CMS Open Payments shows 10 general payments to Dr. Diel from 5 drug and device companies from 2022 to 2023. Food and beverage make up the largest share, 100% of the total. Alcon Laboratories Inc paid the most, $441.
General payments to Dr. Diel by program year, 2022 to 2023
Companies that paid Dr. Diel the most, 2022 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Ryan John Diel graduated from University of Miami, Lm Miller School of Medicine
Dr. Diel graduated from University of Miami, Lm Miller School of Medicine in 2018.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Ryan John Diel'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 services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| 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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Ryan John Diel
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. Ryan John Diel's NPI number?
Dr. Ryan John Diel's NPI number is 1972000164. It was assigned on April 12, 2018, and it is active in the NPI Registry.
What kind of doctor is Dr. Ryan John Diel?
Dr. Ryan John Diel is an ophthalmologist in Iowa City, Iowa. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. Ryan John Diel practice?
Dr. Diel practices at 200 Hawkins Drive, Iowa City, IA 52242. Dr. Diel's primary practice is University of Iowa Health Care Medical Center in Iowa City, Iowa, part of The University of Iowa. Dmand AI also links Dr. Diel to 1 medical group.
What is Dr. Ryan John Diel's office phone number?
The practice phone on file for Dr. Diel is (319) 356-1616.
What is Dr. Ryan John Diel's medical license number?
Dr. Diel holds Iowa license MD-52218, one of the licenses on file in 2 states.
Which states has Dr. Ryan John Diel been licensed in?
Dmand AI has state licenses on file for Dr. Diel in Iowa and Nevada.
Which hospitals is Dr. Ryan John Diel affiliated with?
Dr. Diel practices at University of Iowa Health Care Medical Center in Iowa City, Iowa.
What medical group is Dr. Ryan John Diel part of?
Dr. Diel is linked to Scanlan Center for School Mental Health Clinic. Dmand AI links Dr. Diel to 1 more medical group.
Does Dr. Ryan John Diel accept Medicare?
Yes. CMS data shows Dr. Diel billed Medicare for 1,141 services in 2024, and Dr. Diel accepts Medicare assignment.
What is Dr. Ryan John Diel's MIPS score?
Dr. Diel's MIPS final score for performance year 2024 is 88 out of 100, reported as part of a group.
Show 8 more questionsShow fewer questions
How many Medicare patients does Dr. Ryan John Diel see?
CMS counts 475 Medicare patients who saw Dr. Diel in 2024, with an average age of 75.
What services does Dr. Ryan John Diel bill to Medicare?
In 2024, Dr. Diel's most billed Medicare services were eye exam or test (92136), eye exam or test (92014) and eye exam or test (92134).
Where did Dr. Ryan John Diel go to medical school?
Dr. Diel graduated from University of Miami, Lm Miller School of Medicine in 2018.
What drugs does Dr. Ryan John Diel prescribe most?
In 2024 Medicare Part D data, Dr. Diel's most prescribed drugs by claims were Prednisolone Acetate, Latanoprost and Ketorolac Tromethamine.
Has Dr. Ryan John Diel received payments from drug or device companies?
CMS Open Payments shows $879 in general payments to Dr. Diel from 5 companies from 2022 to 2023. The largest total came from Alcon Laboratories Inc.
How long has Dr. Ryan John Diel been practicing?
Dr. Diel graduated from medical school in 2018, 8 years ago.
Does Dr. Ryan John Diel do research?
Dmand AI links 12 publications to Dr. Diel, published from 2017 to 2025.
Who does Dr. Ryan John Diel publish with?
Dr. Diel's most frequent co-authors are Anat Galor, MD (5 shared papers), Roy Clifford Levitt, MD (4 shared papers) and Pavlina S. Kemp, MD (3 shared papers).
Selling to ophthalmology practices?
See ophthalmologists in Iowa by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card