Dr. Cornelia N. Drees, MD
- Medicare services, 2024
- 982
- Medicare patients, 2024
- 323
- Part D claims, 2024
- 330
- Hospital affiliations
- 1
- Industry payments
- $3,831
- Practice address
- 5777 East Mayo Boulevard, Phoenix, AZ 85054
- Practice phone
- Call (480) 342-4201
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Drees' professional email, personal email and mobile number
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Dr. Cornelia N. Drees is an epilepsy physician in Phoenix, Arizona
Dr. Drees practices at Mayo Clinic Hospital - Phoenix in Phoenix, Arizona, part of Mayo Clinic.
Dr. Drees' NPI, 1144265521, was assigned on June 18, 2006. Dr. Drees holds Arizona license 35108.
- NPI
- 1144265521NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4587672126
- NPI enumeration date
- June 18, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (480) 342-4201
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 59
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Cornelia N. Drees practices at Mayo Clinic Hospital - Phoenix in Phoenix, Arizona
Dr. Drees' primary practice is Mayo Clinic Hospital - Phoenix, at 5777 East Mayo Boulevard, Phoenix, AZ 85054 in Maricopa County. The practice phone is (480) 342-4201.
- Mayo Clinic Hospital - Phoenix5777 East Mayo Boulevard, Phoenix, AZ 85054 · Maricopa CountyPhone(480) 342-4201
Source: Dmand AI Affiliation Data
Dr. Cornelia N. Drees is affiliated with 2 sites of care and 4 medical groups
Dr. Drees' primary practice is Mayo Clinic Hospital - Phoenix in Phoenix, Arizona, part of Mayo Clinic. The medical group on file is Mayo Clinic Arizona. Dmand AI also links Dr. Drees to 3 more medical groups and 1 ambulatory surgery center, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Cornelia N. Drees' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Drees practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mayo Clinic Hospital - Phoenix | Available with a free account |
| +1 more site and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Cornelia N. Drees is one of 17 epilepsy physicians in Arizona
Epilepsy is Dr. Drees' primary specialty in the NPI Registry, under taxonomy code 2084E0001X. Dmand AI has Dr. Drees' licenses on file in 2 states: Arizona and Colorado.
Specialties and state licenses
- Epilepsy, ArizonaPrimary
- Clinical neurophysiology, Colorado
Epilepsy physicians near Dr. Drees
Counts of epilepsy 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. Cornelia N. Drees billed Medicare for 982 services in 2024
CMS data shows 982 Medicare services from Dr. Drees across 15 procedure codes in 2024, for 323 Medicare patients. Medicare paid $79,452 for them.
Dr. Drees' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 4062024: 45312%
- Other services
- 2023: 2242024: 42590%
- Office and hospital visits
- 2023: 622024: 10468%
Where Dr. Drees' Medicare services took place, 2024
- In an office23724%
- In a facility74576%
Dr. Drees compared with the Arizona median for epilepsy physicians, 2024
- Dr. Drees
- Arizona median
- Medicare services
- 982vs 4242.3 times
- Medicare patients
- 323vs 21252% above
- Part D claims
- 255vs 50750% below
Medians across 17 epilepsy physicians in Arizona with Dmand AI profiles that report each measure.
Dr. Drees' 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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Cornelia N. Drees treated 323 Medicare patients in 2024, average age 72
CMS counts 323 Medicare patients who saw Dr. Drees in 2024. The largest group is 65 to 74, with 144 patients. 75% of them have high cholesterol, and 74% have high blood pressure. 11% are also on Medicaid. Their average risk score is 1.86, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Drees' median patient age at 55, with 56% women.
Dr. Drees' Medicare patients by age, 2024
Dr. Drees' Medicare patients by sex, 2024
- Women16350%
- Men16050%
Chronic conditions among Dr. Drees' Medicare patients, 2024
- High cholesterol75%
- High blood pressure74%
- Arthritis54%
- Mood disorders38%
- Anxiety35%
- Depression35%
- Stroke or TIA33%
- Ischemic heart disease31%
Share of Medicare patients with each condition. A patient can have several.
Dr. Drees' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 55
Patient panel by sex, all payers
- Women56%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Cornelia N. Drees wrote 330 Medicare Part D claims in 2024
In 2024, Dr. Drees wrote 330 Medicare Part D claims for 89 patients. 69% of them were for generic drugs. CMS names the drug for 255 of them, across 13 drugs with 11 or more claims each, at $146,449 in total drug cost. In 2023, CMS named 209 claims across 11 drugs.
Dr. Drees' Part D claims by kind of drug, 2024
- Generic229 claims69%
- Brand-name and other101 claims31%
Dr. Drees' 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: 2092024: 25522%
Drugs named by CMS: 13 in 2024, 11 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. Cornelia N. Drees offers telehealth to Medicare patients
Dr. Drees accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Drees as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Cornelia N. Drees received $3,831 in industry payments from 2016 to 2018
CMS Open Payments shows 13 general payments to Dr. Drees from 2 drug and device companies from 2016 to 2018. Education make up the largest share, 63% of the total. Neuropace, Inc. paid the most, $3,430. It also lists 92 research payments totaling $178,595 from 2016 to 2020.
General payments to Dr. Drees by program year, 2016 to 2018
General payments to Dr. Drees by kind, 2016 to 2018
- Education$2,40063%
- Food and beverage$1,06128%
- Travel and lodging$37110%
Companies that paid Dr. Drees the most, 2016 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Cornelia N. Drees'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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Cornelia N. Drees
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. Cornelia N. Drees' NPI number?
Dr. Cornelia N. Drees' NPI number is 1144265521. It was assigned on June 18, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Cornelia N. Drees?
Dr. Cornelia N. Drees is an epilepsy physician in Phoenix, Arizona. The primary specialty in the NPI Registry is Epilepsy Physician (taxonomy code 2084E0001X).
Where does Dr. Cornelia N. Drees practice?
Dr. Drees practices at 5777 East Mayo Boulevard, Phoenix, AZ 85054. Dr. Drees' primary practice is Mayo Clinic Hospital - Phoenix in Phoenix, Arizona, part of Mayo Clinic. Dmand AI also links Dr. Drees to 3 medical groups and 1 ambulatory surgery center.
What is Dr. Cornelia N. Drees' office phone number?
The practice phone on file for Dr. Drees is (480) 342-4201.
What is Dr. Cornelia N. Drees' medical license number?
Dr. Drees holds Arizona license 35108, one of the licenses on file in 2 states.
Which states has Dr. Cornelia N. Drees been licensed in?
Dmand AI has state licenses on file for Dr. Drees in Arizona and Colorado.
Which hospitals is Dr. Cornelia N. Drees affiliated with?
Dr. Drees practices at Mayo Clinic Hospital - Phoenix in Phoenix, Arizona.
What medical group is Dr. Cornelia N. Drees part of?
Dr. Drees is linked to Mayo Clinic Arizona. Dmand AI links Dr. Drees to 3 more medical groups.
Does Dr. Cornelia N. Drees accept Medicare?
Yes. CMS data shows Dr. Drees billed Medicare for 982 services in 2024, and Dr. Drees accepts Medicare assignment.
Does Dr. Cornelia N. Drees offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Drees as offering telehealth services.
Show 5 more questionsShow fewer questions
How many Medicare patients does Dr. Cornelia N. Drees see?
CMS counts 323 Medicare patients who saw Dr. Drees in 2024, with an average age of 72.
What services does Dr. Cornelia N. Drees bill to Medicare?
In 2024, Dr. Drees' most billed Medicare services were medicare service (G0453), nerve and brain test (95812) and nerve and brain test (95720).
What drugs does Dr. Cornelia N. Drees prescribe most?
In 2024 Medicare Part D data, Dr. Drees' most prescribed drugs by claims were Xcopri, Lacosamide and Lamotrigine ER.
Has Dr. Cornelia N. Drees received payments from drug or device companies?
CMS Open Payments shows $3,831 in general payments to Dr. Drees from 2 companies from 2016 to 2018. The largest total came from Neuropace, Inc.
How long has Dr. Cornelia N. Drees been practicing?
Dr. Drees graduated from medical school in 1993, 33 years ago.
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