Dr. William John Ray, MD
- Medicare services, 2024
- 1,042
- Medicare patients, 2024
- 171
- Part D claims, 2024
- 5,337
- Publications
- 4
- Hospital affiliations
- 2
- Practice address
- 506 E State Parkway, Schaumburg, IL 60173
- Practice phone
- Call (847) 885-2010
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Schaumburg Laboratory Facility
Clinical Lab - Full Service · Schaumburg, Illinois
Find Dr. Ray's professional email, personal email and mobile number
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Dr. William John Ray is an internist in Schaumburg, Illinois
Dr. Ray practices at Schaumburg Laboratory Facility in Schaumburg, Illinois.
Dr. Ray's NPI, 1689672859, was assigned on July 12, 2005. Dr. Ray graduated from University of Missouri, Columbia School of Medicine in 1988. Dr. Ray holds Illinois license 036-081186.
- NPI
- 1689672859NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2567455041
- NPI enumeration date
- July 12, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (847) 885-2010
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 64
- Medical school graduation
- 1988
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William John Ray practices at Schaumburg Laboratory Facility in Schaumburg, Illinois
Dr. Ray's primary practice is Schaumburg Laboratory Facility, at 506 E State Parkway, Schaumburg, IL 60173. The practice phone is (847) 885-2010.
- Schaumburg Laboratory Facility506 E State Parkway, Schaumburg, IL 60173Phone(847) 885-2010
Source: Dmand AI Affiliation Data
Dr. William John Ray is affiliated with 6 sites of care and 1 medical group
Dr. Ray's primary practice is Schaumburg Laboratory Facility in Schaumburg, Illinois. Dr. Ray is also affiliated with OSF St. Joseph Medical Center. The medical group on file is Carle Physician Group. Dmand AI also links Dr. Ray to 1 more hospital, 1 physician office, 1 group practice or clinic and 1 skilled nursing facility, 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. William John Ray's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ray practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Schaumburg Laboratory Facility | Available with a free account |
| +5 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William John Ray is one of 5,652 internists in Illinois
Internal medicine is Dr. Ray's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Ray is licensed in Illinois.
Specialties and state licenses
- Internal medicine, IllinoisPrimary
Internists near Dr. Ray
Counts of internists 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. William John Ray billed Medicare for 1,042 services in 2024
CMS data shows 1,042 Medicare services from Dr. Ray across 14 procedure codes in 2024, for 171 Medicare patients. Medicare paid $66,538 for them.
Dr. Ray's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3552024: 45027%
- Other services
- 2023: 2252024: 2271%
- Surgery
- 2023: 2002024: 16916%
- Tests and treatments
- 2023: 1192024: 15329%
- Lab and pathology
- 2023: 332024: 4330%
Where Dr. Ray's Medicare services took place, 2024
- In an office99595%
- In a facility475%
Dr. Ray compared with the Illinois median for internists, 2024
- Dr. Ray
- Illinois median
- Medicare services
- 1,042vs 56684% above
- Medicare patients
- 171vs 20818% below
- Part D claims
- 4,706vs 28416.6 times
Medians across 5,192 internists in Illinois with Dmand AI profiles that report each measure.
Dr. Ray'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. Ray?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Ray and other internists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William John Ray treated 171 Medicare patients in 2024, average age 75
CMS counts 171 Medicare patients who saw Dr. Ray in 2024. The largest group is 65 to 74, with 88 patients. 75% of them have high cholesterol, and 74% have high blood pressure. Their average risk score is 0.91, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Ray's median patient age at 70, with 41% women.
Dr. Ray's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Ray's Medicare patients by sex, 2024
- Women9254%
- Men7946%
Chronic conditions among Dr. Ray's Medicare patients, 2024
- High cholesterol75%
- High blood pressure74%
- Arthritis41%
- Ischemic heart disease41%
- Diabetes23%
- Mood disorders23%
- Depression21%
- Anxiety20%
Share of Medicare patients with each condition. A patient can have several.
Dr. Ray's 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
- Women41%
- Men59%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. William John Ray wrote 5,337 Medicare Part D claims in 2024
In 2024, Dr. Ray wrote 5,337 Medicare Part D claims for 241 patients. 89% of them were for generic drugs. CMS names the drug for 4,706 of them, across 99 drugs with 11 or more claims each, at $326,517 in total drug cost. In 2023, CMS named 4,395 claims across 96 drugs.
Dr. Ray's Part D claims by kind of drug, 2024
- Generic4,762 claims89%
- Brand-name562 claims11%
- Other13 claims0%
Dr. Ray'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. Ray's Part D claims, 2024
- Opioids3%160 of 5,337 claims
- Antibiotics4%197 of 5,337 claims
- Antipsychotics, patients 65 and over0%15 of 5,337 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: 4,3952024: 4,7067%
Drugs named by CMS: 99 in 2024, 96 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
How Dr. William John Ray takes part in Medicare
Dr. Ray accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. William John Ray has 4 publications on record
Dmand AI links 4 papers to Dr. Ray, published from 2015 to 2023. The most frequent topics are Biomechanical Phenomena. Dr. Ray's most frequent co-authors are Summer E. Hanson and Un Jung Kang, MD.
Topics Dr. Ray writes about most
- Biomechanical Phenomena
Dr. Ray's most frequent co-authors
Recent publications by Dr. Ray
Curr Biol
Integr Comp Biol
See who Dr. Ray researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Ray works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. William John Ray received $4,174 in industry payments from 2016 to 2025
CMS Open Payments shows 265 general payments to Dr. Ray from 22 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Novo Nordisk Inc paid the most, $856.
General payments to Dr. Ray by program year, 2016 to 2025
General payments to Dr. Ray by kind, 2016 to 2025
- Food and beverage$4,159100%
- Education$150%
Companies that paid Dr. Ray 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. William John Ray graduated from University of Missouri, Columbia School of Medicine
Dr. Ray graduated from University of Missouri, Columbia School of Medicine in 1988.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. William John Ray'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) |
| 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. William John Ray
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. William John Ray's NPI number?
Dr. William John Ray's NPI number is 1689672859. It was assigned on July 12, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. William John Ray?
Dr. William John Ray is an internist in Schaumburg, Illinois. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. William John Ray practice?
Dr. Ray practices at 506 E State Parkway, Schaumburg, IL 60173. Dr. Ray's primary practice is Schaumburg Laboratory Facility in Schaumburg, Illinois. Dmand AI also links Dr. Ray to 1 hospital, 1 physician office, 1 group practice or clinic and 1 skilled nursing facility.
What is Dr. William John Ray's office phone number?
The practice phone on file for Dr. Ray is (847) 885-2010.
What is Dr. William John Ray's medical license number?
Dr. Ray holds Illinois license 036-081186.
Which hospitals is Dr. William John Ray affiliated with?
Dr. Ray is affiliated with OSF St. Joseph Medical Center. Dmand AI links Dr. Ray to 1 more hospital.
What medical group is Dr. William John Ray part of?
Dr. Ray is linked to Carle Physician Group.
Does Dr. William John Ray accept Medicare?
Yes. CMS data shows Dr. Ray billed Medicare for 1,042 services in 2024, and Dr. Ray accepts Medicare assignment.
How many Medicare patients does Dr. William John Ray see?
CMS counts 171 Medicare patients who saw Dr. Ray in 2024, with an average age of 75.
What services does Dr. William John Ray bill to Medicare?
In 2024, Dr. Ray's most billed Medicare services were office visit, established patient (99213), surgery: heart and blood vessels (36415) and medicare service (G0439).
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Where did Dr. William John Ray go to medical school?
Dr. Ray graduated from University of Missouri, Columbia School of Medicine in 1988.
What drugs does Dr. William John Ray prescribe most?
In 2024 Medicare Part D data, Dr. Ray's most prescribed drugs by claims were Rosuvastatin Calcium, Metoprolol Succinate and Levothyroxine Sodium.
Has Dr. William John Ray received payments from drug or device companies?
CMS Open Payments shows $4,174 in general payments to Dr. Ray from 22 companies from 2016 to 2025. The largest total came from Novo Nordisk Inc.
How long has Dr. William John Ray been practicing?
Dr. Ray graduated from medical school in 1988, 38 years ago.
Does Dr. William John Ray do research?
Dmand AI links 4 publications to Dr. Ray, published from 2015 to 2023.
Who does Dr. William John Ray publish with?
Dr. Ray's most frequent co-authors are Summer E. Hanson (1 shared paper) and Un Jung Kang, MD (1 shared paper).
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