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Dr. Phyllis Chizomam Okereke, MD
NPI1598749301
- Part D claims, 2024
- 35
- Publications
- 6
- Hospital affiliations
- 1
- Industry payments
- $125
- State licenses
- 2
- Practice address
- 901 Montgomery Street, Decorah, IA 52101
- Practice phone
- Call (563) 382-2911
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Phyllis Chizomam Okereke is an ophthalmologist in Decorah, Iowa
Dr. Okereke practices at WinnMed in Decorah, Iowa, part of State of Iowa.
Dr. Okereke's NPI, 1598749301, was assigned on December 5, 2005. Dr. Okereke graduated from University of Nigeria Faculty of Medicine in 1975. Dr. Okereke's Texas license number on file is K9375.
NPI and contact details
- NPI
- 1598749301NPI Registry (opens in a new tab)
- NPI enumeration date
- December 5, 2005
- NPI status
- Active
- Practice phone
- (563) 382-2911
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Medical school graduation
- 1975
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Phyllis Chizomam Okereke practices at WinnMed in Decorah, Iowa
Dr. Okereke's primary practice is WinnMed, at 901 Montgomery Street, Decorah, IA 52101 in Winneshiek County. The practice phone is (563) 382-2911.
- WinnMed901 Montgomery Street, Decorah, IA 52101 · Winneshiek CountyPhone(563) 382-2911
Source: Dmand AI Affiliation Data
Dr. Phyllis Chizomam Okereke is affiliated with 2 sites of care
Dr. Okereke's primary practice is WinnMed in Decorah, Iowa, part of State of Iowa. Dmand AI also links Dr. Okereke to 1 therapy and rehab clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Phyllis Chizomam Okereke's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Okereke practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| WinnMed | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Phyllis Chizomam Okereke is one of 180 ophthalmologists in Iowa
Ophthalmology is Dr. Okereke's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dmand AI has Dr. Okereke's licenses on file in 2 states: Texas and Iowa.
Specialties and state licenses
- Ophthalmology, TexasPrimary
- Iowa license
Ophthalmologists near Dr. Okereke
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. Phyllis Chizomam Okereke's patients have a median age of 85
Across all payers, Dmand AI patient panel data puts Dr. Okereke's median patient age at 85, with 50% women.
Dr. Okereke's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 85
Patient panel by sex, all payers
- Women50%
- Men50%
Source: Dmand AI Patient Panel Data
Dr. Phyllis Chizomam Okereke wrote 35 Medicare Part D claims in 2024
In 2024, Dr. Okereke wrote 35 Medicare Part D claims for 12 patients. 57% of them were for generic drugs. CMS names the drug for 11 of them, across 1 drug with 11 or more claims each, at $145 in total drug cost. In 2023, CMS named 11 claims across 1 drug.
Part D claims, 202435
Drugs named by CMS1
Total drug cost$145
Part D patients12
Dr. Okereke's Part D claims by kind of drug, 2024
- Generic20 claims57%
- Brand-name and other15 claims43%
Dr. Okereke'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: 112024: 11No change
Drugs named by CMS: 1 in 2024, 1 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
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Dr. Phyllis Chizomam Okereke has 6 publications on record
Dmand AI links 6 papers to Dr. Okereke. The most frequent topics are Eyelid Diseases. Dr. Okereke has published most often in Ophthalmic Surg.
Papers6
Topics Dr. Okereke writes about most
- Eyelid Diseases
Recent publications by Dr. Okereke
Saudi Med J
Folic Acid DeficiencyMass ScreeningNervous System Diseases
Ophthalmic Surg
DrainageEvaluation Studies as TopicGlaucoma
Ophthalmic Surg
Anti-Infective Agents, LocalBacitracinCyanoacrylates
ArgonIris DiseasesLaser Therapy
See who Dr. Okereke researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Okereke 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. Phyllis Chizomam Okereke received $125 in industry payments in 2019
CMS Open Payments shows 1 general payment to Dr. Okereke from 1 drug or device company in 2019. Food and beverage make up the largest share, 100% of the total. Regeneron Pharmaceuticals, Inc. paid the most, $125.
Companies that paid Dr. Okereke the most, 2019 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Phyllis Chizomam Okereke graduated from University of Nigeria Faculty of Medicine
Dr. Okereke graduated from University of Nigeria Faculty of Medicine in 1975.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Phyllis Chizomam Okereke'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) |
| 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. Phyllis Chizomam Okereke
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. Phyllis Chizomam Okereke's NPI number?
Dr. Phyllis Chizomam Okereke's NPI number is 1598749301. It was assigned on December 5, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Phyllis Chizomam Okereke?
Dr. Phyllis Chizomam Okereke is an ophthalmologist in Decorah, Iowa. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. Phyllis Chizomam Okereke practice?
Dr. Okereke practices at 901 Montgomery Street, Decorah, IA 52101. Dr. Okereke's primary practice is WinnMed in Decorah, Iowa, part of State of Iowa. Dmand AI also links Dr. Okereke to 1 therapy and rehab clinic.
What is Dr. Phyllis Chizomam Okereke's office phone number?
The practice phone on file for Dr. Okereke is (563) 382-2911.
What is Dr. Phyllis Chizomam Okereke's medical license number?
Dr. Okereke's Texas license number on file is K9375, one of the licenses on file in 2 states.
Which states has Dr. Phyllis Chizomam Okereke been licensed in?
Dmand AI has state licenses on file for Dr. Okereke in Texas (2000 to 2025) and Iowa (1996 to 2001).
Which hospitals is Dr. Phyllis Chizomam Okereke affiliated with?
Dr. Okereke practices at WinnMed in Decorah, Iowa.
Where did Dr. Phyllis Chizomam Okereke go to medical school?
Dr. Okereke graduated from University of Nigeria Faculty of Medicine in 1975.
What drugs does Dr. Phyllis Chizomam Okereke prescribe most?
In 2024 Medicare Part D data, Dr. Okereke's most prescribed drugs by claims were Metformin HCl ER.
Has Dr. Phyllis Chizomam Okereke received payments from drug or device companies?
CMS Open Payments shows $125 in general payments to Dr. Okereke from 1 company from 2019 to 2019. The largest total came from Regeneron Pharmaceuticals, Inc.
How long has Dr. Phyllis Chizomam Okereke been practicing?
Dr. Okereke graduated from medical school in 1975, 51 years ago.
Does Dr. Phyllis Chizomam Okereke do research?
Dmand AI links 6 publications to Dr. Okereke.
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