Dr. Jeffrey Lynn Maassen, MD
- Medicare services, 2024
- 2,408
- Medicare patients, 2024
- 813
- Part D claims, 2024
- 1,157
- Hospital affiliations
- 2
- Industry payments
- $54
- Practice address
- 1650 1st Ave Ne, Cedar Rapids, IA 52402-5431
- Practice phone
- Call (319) 362-3937
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Iowa Eye Center
Eye care practice · Cedar Rapids, Iowa
Find Dr. Maassen's professional email, personal email and mobile number
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Dr. Jeffrey Lynn Maassen is an ophthalmologist in Cedar Rapids, Iowa
Dr. Maassen practices at Iowa Eye Center in Cedar Rapids, Iowa.
Dr. Maassen's NPI, 1124065883, was assigned on June 1, 2006. Dr. Maassen graduated from University of Iowa, RJ & L Carver College of Medicine in 2002. Dr. Maassen holds Iowa license 36554.
- NPI
- 1124065883NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1456363878
- NPI enumeration date
- June 1, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (319) 362-3937
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 50
- Medical school graduation
- 2002
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Jeffrey Lynn Maassen practices at Iowa Eye Center in Cedar Rapids, Iowa
Dr. Maassen's primary practice is Iowa Eye Center, at 1650 1st Ave Ne, Cedar Rapids, IA 52402-5431. The practice phone is (319) 362-3937.
- Iowa Eye Center1650 1st Ave Ne, Cedar Rapids, IA 52402-5431Phone(319) 362-3937
Source: Dmand AI Affiliation Data
Dr. Jeffrey Lynn Maassen is affiliated with 3 sites of care and 1 medical group
Dr. Maassen's primary practice is Iowa Eye Center in Cedar Rapids, Iowa. Dr. Maassen is also affiliated with Mercy Medical Center. Dmand AI also links Dr. Maassen to 1 more hospital and 1 medical group, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Jeffrey Lynn Maassen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Maassen practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Iowa Eye Center | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Jeffrey Lynn Maassen is one of 180 ophthalmologists in Iowa
Ophthalmology is Dr. Maassen's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Maassen is licensed in Iowa.
Specialties and state licenses
- Ophthalmology, IowaPrimary
Ophthalmologists near Dr. Maassen
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. Jeffrey Lynn Maassen billed Medicare for 2,408 services in 2024
CMS data shows 2,408 Medicare services from Dr. Maassen across 15 procedure codes in 2024, for 813 Medicare patients. Medicare paid $136,809 for them.
Dr. Maassen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 1,6542024: 2,06925%
- Office and hospital visits
- 2023: 8902024: 24373%
- Surgery
- 2023: 1322024: 9627%
Where Dr. Maassen's Medicare services took place, 2024
- In an office2,34497%
- In a facility643%
Dr. Maassen compared with the Iowa median for ophthalmologists, 2024
- Dr. Maassen
- Iowa median
- Medicare services
- 2,408vs 1,79234% above
- Medicare patients
- 813vs 66922% above
- Part D claims
- 1,072vs 3962.7 times
Medians across 183 ophthalmologists in Iowa with Dmand AI profiles that report each measure.
Dr. Maassen'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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Maassen and other ophthalmologists in Iowa.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Jeffrey Lynn Maassen treated 813 Medicare patients in 2024, average age 76
CMS counts 813 Medicare patients who saw Dr. Maassen in 2024. The largest group is 65 to 74, with 371 patients. 75% of them have high cholesterol, and 70% have high blood pressure. 1% are also on Medicaid. Their average risk score is 1.03, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Maassen's median patient age at 76, with 60% women.
Dr. Maassen's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Maassen's Medicare patients by sex, 2024
- Women48660%
- Men32740%
Chronic conditions among Dr. Maassen's Medicare patients, 2024
- High cholesterol75%
- High blood pressure70%
- Arthritis40%
- Diabetes31%
- Chronic kidney disease24%
- Ischemic heart disease23%
- Mood disorders22%
- Depression21%
Share of Medicare patients with each condition. A patient can have several.
Dr. Maassen'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
- Women60%
- Men39%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Jeffrey Lynn Maassen wrote 1,157 Medicare Part D claims in 2024
In 2024, Dr. Maassen wrote 1,157 Medicare Part D claims for 262 patients. 69% of them were for generic drugs. CMS names the drug for 1,072 of them, across 12 drugs with 11 or more claims each, at $31,893 in total drug cost. In 2023, CMS named 932 claims across 12 drugs.
Dr. Maassen's Part D claims by kind of drug, 2024
- Generic795 claims69%
- Brand-name362 claims31%
Dr. Maassen'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: 9322024: 1,07215%
Drugs named by CMS: 12 in 2024, 12 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. Jeffrey Lynn Maassen ranks in the 72nd percentile for cataract surgery in Medicare
Dr. Maassen accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 88 procedures of cataract surgery by Dr. Maassen, more than 72% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Maassen ranks in Medicare procedure volume
- Cataract surgery
- 72nd percentile88 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Jeffrey Lynn Maassen received $54 in industry payments from 2021 to 2024
CMS Open Payments shows 3 general payments to Dr. Maassen from 3 drug and device companies from 2021 to 2024. Food and beverage make up the largest share, 100% of the total. Alcon Laboratories Inc paid the most, $20.
General payments to Dr. Maassen by program year, 2021 to 2024
Companies that paid Dr. Maassen the most, 2021 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Jeffrey Lynn Maassen graduated from University of Iowa, RJ & L Carver College of Medicine
Dr. Maassen graduated from University of Iowa, RJ & L Carver College of Medicine in 2002.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Jeffrey Lynn Maassen'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 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)Doctors and Clinicians Utilization Data (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. Jeffrey Lynn Maassen
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. Jeffrey Lynn Maassen's NPI number?
Dr. Jeffrey Lynn Maassen's NPI number is 1124065883. It was assigned on June 1, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Jeffrey Lynn Maassen?
Dr. Jeffrey Lynn Maassen is an ophthalmologist in Cedar Rapids, Iowa. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. Jeffrey Lynn Maassen practice?
Dr. Maassen practices at 1650 1st Ave Ne, Cedar Rapids, IA 52402-5431. Dr. Maassen's primary practice is Iowa Eye Center in Cedar Rapids, Iowa. Dmand AI also links Dr. Maassen to 1 hospital and 1 medical group.
What is Dr. Jeffrey Lynn Maassen's office phone number?
The practice phone on file for Dr. Maassen is (319) 362-3937.
What is Dr. Jeffrey Lynn Maassen's medical license number?
Dr. Maassen holds Iowa license 36554.
Which hospitals is Dr. Jeffrey Lynn Maassen affiliated with?
Dr. Maassen is affiliated with Mercy Medical Center. Dmand AI links Dr. Maassen to 1 more hospital.
Does Dr. Jeffrey Lynn Maassen accept Medicare?
Yes. CMS data shows Dr. Maassen billed Medicare for 2,408 services in 2024, and Dr. Maassen accepts Medicare assignment.
How many Medicare patients does Dr. Jeffrey Lynn Maassen see?
CMS counts 813 Medicare patients who saw Dr. Maassen in 2024, with an average age of 76.
What services does Dr. Jeffrey Lynn Maassen bill to Medicare?
In 2024, Dr. Maassen's most billed Medicare services were eye exam or test (92014), eye exam or test (92134) and eye exam or test (92133).
Where did Dr. Jeffrey Lynn Maassen go to medical school?
Dr. Maassen graduated from University of Iowa, RJ & L Carver College of Medicine in 2002.
Show 3 more questionsShow fewer questions
What drugs does Dr. Jeffrey Lynn Maassen prescribe most?
In 2024 Medicare Part D data, Dr. Maassen's most prescribed drugs by claims were Latanoprost, Prednisolone Acetate and Moxifloxacin.
Has Dr. Jeffrey Lynn Maassen received payments from drug or device companies?
CMS Open Payments shows $54 in general payments to Dr. Maassen from 3 companies from 2021 to 2024. The largest total came from Alcon Laboratories Inc.
How long has Dr. Jeffrey Lynn Maassen been practicing?
Dr. Maassen graduated from medical school in 2002, 24 years ago.
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