Curr Med Res Opin
Biphasic InsulinsBlack or African AmericanBlood Glucose
Dr. David Smith Oyer, MD
NPI1134226467PAC ID0941263677
- Medicare services, 2024
- 822
- Medicare patients, 2024
- 225
- Part D claims, 2024
- 6,152
- Publications
- 10
- Hospital affiliations
- 5
- Practice address
- 251 E Huron St, Chicago, IL 60611
- Practice phone
- Call (312) 926-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Oyer's professional email, personal email and mobile number
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Dr. David Smith Oyer is an endocrinologist in Chicago, Illinois
Dr. Oyer practices at Northwestern Memorial Hospital in Chicago, Illinois, part of Northwestern Memorial HealthCare.
Dr. Oyer's NPI, 1134226467, was assigned on September 20, 2006. Dr. Oyer graduated from Harvard Medical School in 1969. Dr. Oyer holds Illinois license 036050957.
NPI and contact details
- NPI
- 1134226467NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0941263677
- NPI enumeration date
- September 20, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (312) 926-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 83
- Medical school graduation
- 1969
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. David Smith Oyer practices at Northwestern Memorial Hospital in Chicago, Illinois
Dr. Oyer's primary practice is Northwestern Memorial Hospital, at 251 E Huron St, Chicago, IL 60611 in Cook County. The practice phone is (312) 926-2000.
- Northwestern Memorial Hospital251 E Huron St, Chicago, IL 60611 · Cook CountyPhone(312) 926-2000
Source: Dmand AI Affiliation Data
Dr. David Smith Oyer is affiliated with 7 sites of care
Dr. Oyer's primary practice is Northwestern Memorial Hospital in Chicago, Illinois, part of Northwestern Memorial HealthCare. Dr. Oyer is also affiliated with Northwestern Medicine Central DuPage Hospital. Dmand AI also links Dr. Oyer to 3 more hospitals, 1 physician office and 1 home health agency, each named with a free account.
Northwestern Medicine Central DuPage Hospital3 hospitalsNames with a free account1 physician officeName with a free account1 home health agencyName with a free account
See all 7 affiliations for Dr. OyerSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. David Smith Oyer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Oyer practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Northwestern Memorial Hospital | Available with a free account |
| +6 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. David Smith Oyer is one of 358 endocrinologists in Illinois
Endocrinology, diabetes and metabolism is Dr. Oyer's primary specialty in the NPI Registry, under taxonomy code 207RE0101X. Dr. Oyer is board certified in endocrinology, diabetes and metabolism by the American Board of Internal Medicine. Dr. Oyer is licensed in Illinois.
Specialties and state licenses
- Endocrinology, diabetes and metabolism, IllinoisPrimary
Clinical focus
Dmand AI lists chronic diabetes, diabetic emergency, enlarged thyroid, high cholesterol, osteoporosis, underactive thyroid and vitamin d deficiency among the conditions Dr. Oyer treats.
Endocrinologists near Dr. Oyer
Counts of endocrinologists with a Dmand AI profile, by place and practice. Each opens the list.
358endocrinologists in Illinois110endocrinologists in Chicago5endocrinologists at Northwestern Memorial Hospital
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. David Smith Oyer billed Medicare for 822 services in 2024
CMS data shows 822 Medicare services from Dr. Oyer across 10 procedure codes in 2024, for 225 Medicare patients. Medicare paid $56,903 for them. Every service was in an office.
Medicare services, 2024822
Medicare patients225
Paid by Medicare$56,903
Procedure codes10
Dr. Oyer's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5132024: 43316%
- Tests and treatments
- 2023: 1662024: 1585%
- Lab and pathology
- 2023: 2362024: 14439%
- Other services
- 2023: 192024: 87358%
Dr. Oyer compared with the Illinois median for endocrinologists, 2024
- Dr. Oyer
- Illinois median
- Medicare services
- 822vs 73612% above
- Medicare patients
- 225vs 28822% below
- Part D claims
- 5,376vs 1,2804.2 times
Medians across 359 endocrinologists in Illinois with Dmand AI profiles that report each measure.
Dr. Oyer'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. Oyer?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Oyer and other endocrinologists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. David Smith Oyer treated 225 Medicare patients in 2024, average age 78
CMS counts 225 Medicare patients who saw Dr. Oyer in 2024. The largest group is 75 to 84, with 109 patients. 73% of them have high cholesterol, and 60% have high blood pressure. Their average risk score is 1.23, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Oyer's median patient age at 78, with 48% women.
Medicare patients, 2024225
Average age78
Average risk score1.23
Dr. Oyer's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Oyer's Medicare patients by sex, 2024
- Women11451%
- Men11149%
Chronic conditions among Dr. Oyer's Medicare patients, 2024
- High cholesterol73%
- High blood pressure60%
- Diabetes49%
- Arthritis35%
- Ischemic heart disease30%
- Osteoporosis29%
- Chronic kidney disease24%
- Cancer20%
Share of Medicare patients with each condition. A patient can have several.
Dr. Oyer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 78
Patient panel by sex, all payers
- Women48%
- Men52%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. David Smith Oyer wrote 6,152 Medicare Part D claims in 2024
In 2024, Dr. Oyer wrote 6,152 Medicare Part D claims for 304 patients. 74% of them were for generic drugs. CMS names the drug for 5,376 of them, across 114 drugs with 11 or more claims each, at $1,153,585 in total drug cost. In 2023, CMS named 5,136 claims across 108 drugs.
Part D claims, 20246,152
Drugs named by CMS114
Total drug cost$1.2M
Part D patients304
Dr. Oyer's Part D claims by kind of drug, 2024
- Generic4,541 claims74%
- Brand-name1,475 claims24%
- Other136 claims2%
Dr. Oyer'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.
Drug classes CMS tracks in Dr. Oyer's Part D claims, 2024
- Opioids1%92 of 6,152 claims
- Antibiotics3%215 of 6,152 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 5,1362024: 5,3765%
Drugs named by CMS: 114 in 2024, 108 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. David Smith Oyer offers telehealth to Medicare patients
Dr. Oyer accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Oyer as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. David Smith Oyer has 10 publications on record
Dmand AI links 10 papers to Dr. Oyer, published from 2010 to 2012. 2011 was the busiest year, with 2. The most frequent topics are Hypoglycemic Agents, Diabetes Mellitus, Type 2 and Blood Glucose. Dr. Oyer's most frequent co-authors are Bruce Sheldon Trippe, MD, Anuj Bhargava, MD and Robert O. Bonow, MD.
Papers10
Years published2010 to 2012
Dr. Oyer's papers by year, 2010 to 2012
Topics Dr. Oyer writes about most
- Hypoglycemic Agents
- Diabetes Mellitus, Type 2
- Blood Glucose
- Hypoglycemia
- Insulin
- Diabetes Mellitus, Type 1
- Insulin Aspart
- Diabetes Mellitus
Dr. Oyer's most frequent co-authors
- Bruce Sheldon Trippe, MD3 shared papers
- Anuj Bhargava, MD1 shared paper
- Robert O. Bonow, MD1 shared paper
Recent publications by Dr. Oyer
Expert Opin Drug Deliv
Cross-Over StudiesDiabetes Mellitus, Type 1Diabetes Mellitus, Type 2
Blood GlucoseDiabetes Mellitus, Type 2Glycated Hemoglobin
AmiodaroneAnti-Arrhythmia AgentsAtrial Fibrillation
Diabetes Mellitus, Type 1Diabetes Mellitus, Type 2Diabetic Foot
See who Dr. Oyer researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Oyer works with, so you can find a warm path to the right endocrinologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. David Smith Oyer received $378,606 in industry payments from 2016 to 2025
CMS Open Payments shows 706 general payments to Dr. Oyer from 23 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 74% of the total. Novo Nordisk Inc paid the most, $254,365.
General payments to Dr. Oyer by program year, 2016 to 2025
General payments to Dr. Oyer by kind, 2016 to 2025
$378.6Kin total
- Speaker and faculty fees$279,35274%
- Consulting fees$48,07813%
- Travel and lodging$32,0808%
- Food and beverage$16,8944%
- Other$2,2031%
Companies that paid Dr. Oyer the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. David Smith Oyer has 3 awards and honors on record
Dmand AI lists 3 awards for Dr. Oyer, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. Oyer
- 2013
- CMS Stage 1 EHR
- Undated
- AACE Fellow
- Checkbook Top Doc
Source: Dmand AI Professional Profile Data
Dr. David Smith Oyer graduated from Harvard Medical School
Dr. Oyer graduated from Harvard Medical School in 1969. Dr. Oyer is a member of ENDO.
- Medical school
- Board certified in endocrinology, diabetes and metabolism
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. David Smith Oyer accepts plans from 2 insurance carriers
Dr. Oyer is in network with 2 carriers, including Aetna and CMS Medicare. Medicare plans come from the most carriers, 2. Check the plan with the practice before a visit.
- Aetna
- CMS Medicare
Plan types Dr. Oyer accepts, by number of carriers
- Medicare2
- EPO1
- HMO1
- POS1
- PPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. David Smith Oyer'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) |
| 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) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. David Smith Oyer
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. David Smith Oyer's NPI number?
Dr. David Smith Oyer's NPI number is 1134226467. It was assigned on September 20, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. David Smith Oyer?
Dr. David Smith Oyer is an endocrinologist in Chicago, Illinois. The primary specialty in the NPI Registry is Endocrinology, Diabetes & Metabolism Physician (taxonomy code 207RE0101X).
Where does Dr. David Smith Oyer practice?
Dr. Oyer practices at 251 E Huron St, Chicago, IL 60611. Dr. Oyer's primary practice is Northwestern Memorial Hospital in Chicago, Illinois, part of Northwestern Memorial HealthCare. Dmand AI also links Dr. Oyer to 3 hospitals, 1 physician office and 1 home health agency.
What is Dr. David Smith Oyer's office phone number?
The practice phone on file for Dr. Oyer is (312) 926-2000.
What is Dr. David Smith Oyer's medical license number?
Dr. Oyer holds Illinois license 036050957.
Which hospitals is Dr. David Smith Oyer affiliated with?
Dr. Oyer practices at Northwestern Memorial Hospital in Chicago, Illinois. Dr. Oyer is also affiliated with Northwestern Medicine Central DuPage Hospital. Dmand AI links Dr. Oyer to 3 more hospitals.
Does Dr. David Smith Oyer accept Medicare?
Yes. CMS data shows Dr. Oyer billed Medicare for 822 services in 2024, and Dr. Oyer accepts Medicare assignment.
Does Dr. David Smith Oyer offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Oyer as offering telehealth services.
How many Medicare patients does Dr. David Smith Oyer see?
CMS counts 225 Medicare patients who saw Dr. Oyer in 2024, with an average age of 78.
Is Dr. David Smith Oyer board certified?
Yes. Dr. Oyer is board certified in endocrinology, diabetes and metabolism by the American Board of Internal Medicine.
Show 8 more questionsShow fewer questions
What services does Dr. David Smith Oyer bill to Medicare?
In 2024, Dr. Oyer's most billed Medicare services were office visit, established patient (99214), lab and pathology test (83036) and medicare service (G0439).
Where did Dr. David Smith Oyer go to medical school?
Dr. Oyer graduated from Harvard Medical School in 1969.
What drugs does Dr. David Smith Oyer prescribe most?
In 2024 Medicare Part D data, Dr. Oyer's most prescribed drugs by claims were Levothyroxine Sodium, Atorvastatin Calcium and Rosuvastatin Calcium.
Has Dr. David Smith Oyer received payments from drug or device companies?
CMS Open Payments shows $378,606 in general payments to Dr. Oyer from 23 companies from 2016 to 2025. The largest total came from Novo Nordisk Inc.
How long has Dr. David Smith Oyer been practicing?
Dr. Oyer graduated from medical school in 1969, 57 years ago.
Does Dr. David Smith Oyer do research?
Dmand AI links 10 publications to Dr. Oyer, published from 2010 to 2012.
Who does Dr. David Smith Oyer publish with?
Dr. Oyer's most frequent co-authors are Bruce Sheldon Trippe, MD (3 shared papers), Anuj Bhargava, MD (1 shared paper) and Robert O. Bonow, MD (1 shared paper).
What insurance does Dr. David Smith Oyer accept?
Dr. Oyer is in network with 2 carriers, including Aetna and CMS Medicare. Medicare plans come from the most carriers, 2. Check the plan with the practice before a visit.
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