Douglas C. Rienks, OD
- Medicare patients, 2024
- 398
- Part D claims, 2024
- 274
- Industry payments
- $37
- Affiliated sites
- 1
- Medical group
- 1
- Practice address
- 2550 Superior St Suite 150 Suite 150, Lincoln, NE 68521-4156
- Practice phone
- Call (402) 435-1166
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Nebraska Eye Institute
Eye care practice · Lincoln, Nebraska
Find Douglas Rienks' 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.
Douglas C. Rienks is an optometrist in Lincoln, Nebraska
Douglas Rienks practices at Nebraska Eye Institute in Lincoln, Nebraska.
Douglas Rienks' NPI, 1871648386, was assigned on January 24, 2007. Douglas Rienks graduated from Illinois College of Optometry at Chicago in 1991. Douglas Rienks holds Nebraska license 1014.
- NPI
- 1871648386NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8426045139
- NPI enumeration date
- January 24, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (402) 435-1166
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 61
- Medical school graduation
- 1991
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Douglas C. Rienks practices at Nebraska Eye Institute in Lincoln, Nebraska
Douglas Rienks' primary practice is Nebraska Eye Institute, at 2550 Superior St Suite 150 Suite 150, Lincoln, NE 68521-4156. The practice phone is (402) 435-1166.
- Nebraska Eye Institute2550 Superior St Suite 150 Suite 150, Lincoln, NE 68521-4156Phone(402) 435-1166
Source: Dmand AI Affiliation Data
Douglas C. Rienks is affiliated with 1 site of care and 1 medical group
Douglas Rienks' primary practice is Nebraska Eye Institute in Lincoln, Nebraska. Dmand AI also links Douglas Rienks to 1 medical group, named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Douglas C. Rienks' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Douglas Rienks practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Nebraska Eye Institute | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Douglas C. Rienks is one of 399 optometrists in Nebraska
Optometrist is Douglas Rienks' primary specialty in the NPI Registry, under taxonomy code 152W00000X. Douglas Rienks is licensed in Nebraska.
Specialties and state licenses
- Optometrist, NebraskaPrimary
Optometrists near Douglas Rienks
Counts of optometrists 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
Douglas C. Rienks treated 398 Medicare patients in 2024, average age 74
CMS counts 398 Medicare patients who saw Douglas Rienks in 2024. The largest group is 65 to 74, with 219 patients. 73% of them have high cholesterol, and 71% have high blood pressure. 3% are also on Medicaid. Their average risk score is 0.93, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Douglas Rienks' median patient age at 70, with 53% women.
Douglas Rienks' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Douglas Rienks' Medicare patients by sex, 2024
- Women24161%
- Men15739%
Chronic conditions among Douglas Rienks' Medicare patients, 2024
- High cholesterol73%
- High blood pressure71%
- Arthritis41%
- Diabetes26%
- Chronic kidney disease23%
- Ischemic heart disease21%
- Mood disorders18%
- Depression17%
Share of Medicare patients with each condition. A patient can have several.
Douglas Rienks' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women53%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Douglas C. Rienks wrote 274 Medicare Part D claims in 2024
In 2024, Douglas Rienks wrote 274 Medicare Part D claims for 88 patients. 67% of them were for generic drugs.
Douglas Rienks' Part D claims by kind of drug, 2024
- Generic184 claims67%
- Brand-name90 claims33%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Douglas C. Rienks takes part in Medicare
Douglas Rienks accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Cataract surgery: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Douglas C. Rienks received $37 in industry payments in 2025
CMS Open Payments shows 1 general payment to Douglas Rienks from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Topcon Medical Systems, Inc. paid the most, $37.
Companies that paid Douglas Rienks the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Douglas C. Rienks graduated from Illinois College of Optometry at Chicago
Douglas Rienks graduated from Illinois College of Optometry at Chicago in 1991.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Douglas C. Rienks'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 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 (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 Douglas C. Rienks
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Douglas C. Rienks' NPI number?
Douglas C. Rienks' NPI number is 1871648386. It was assigned on January 24, 2007, and it is active in the NPI Registry.
What does Douglas C. Rienks specialize in?
Douglas C. Rienks is an optometrist in Lincoln, Nebraska. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does Douglas C. Rienks practice?
Douglas Rienks practices at 2550 Superior St Suite 150 Suite 150, Lincoln, NE 68521-4156. Douglas Rienks' primary practice is Nebraska Eye Institute in Lincoln, Nebraska. Dmand AI also links Douglas Rienks to 1 medical group.
What is Douglas C. Rienks' office phone number?
The practice phone on file for Douglas Rienks is (402) 435-1166.
What is Douglas C. Rienks' medical license number?
Douglas Rienks holds Nebraska license 1014.
Does Douglas C. Rienks accept Medicare?
Yes. CMS lists Douglas Rienks as accepting Medicare assignment.
How many Medicare patients does Douglas C. Rienks see?
CMS counts 398 Medicare patients who saw Douglas Rienks in 2024, with an average age of 74.
Where did Douglas C. Rienks go to medical school?
Douglas Rienks graduated from Illinois College of Optometry at Chicago in 1991.
Has Douglas C. Rienks received payments from drug or device companies?
CMS Open Payments shows $37 in general payments to Douglas Rienks from 1 company from 2025 to 2025. The largest total came from Topcon Medical Systems, Inc.
How long has Douglas C. Rienks been practicing?
Douglas Rienks graduated from medical school in 1991, 35 years ago.
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