Dr. William C. Dam, MD
- Medicare services, 2022
- 222
- Part D claims, 2022
- 700
- Hospital affiliations
- 2
- Industry payments
- $972
- Medical group
- 1
- Practice address
- 4201 Medical Center Drive, Mchenry, IL 60050
- Practice phone
- Call (815) 344-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Dam's 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.
Dr. William C. Dam is an internist in Mchenry, Illinois
Dr. Dam practices at Northwestern Medicine McHenry Hospital in Mchenry, Illinois, part of Northwestern Memorial HealthCare.
Dr. Dam's NPI, 1447236229, was assigned on December 22, 2005. Dr. Dam graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 1971. Dr. Dam holds Illinois license 036047653.
- NPI
- 1447236229NPI Registry (opens in a new tab)
- NPI enumeration date
- December 22, 2005
- NPI status
- Active
- Practice phone
- (815) 344-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 81
- Medical school graduation
- 1971
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. William C. Dam practices at Northwestern Medicine McHenry Hospital in Mchenry, Illinois
Dr. Dam's primary practice is Northwestern Medicine McHenry Hospital, at 4201 Medical Center Drive, Mchenry, IL 60050 in Mc Henry County. The practice phone is (815) 344-5000.
- Northwestern Medicine McHenry Hospital4201 Medical Center Drive, Mchenry, IL 60050 · Mc Henry CountyPhone(815) 344-5000
Source: Dmand AI Affiliation Data
Dr. William C. Dam is affiliated with 2 sites of care and 1 medical group
Dr. Dam's primary practice is Northwestern Medicine McHenry Hospital in Mchenry, Illinois, part of Northwestern Memorial HealthCare. Dmand AI also links Dr. Dam to 1 hospital and 1 medical group, 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 C. Dam's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Dam practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Northwestern Medicine McHenry Hospital | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Northwestern Memorial HealthCare and 6.2K+ hospitals, with verified contacts in the same login.
Dr. William C. Dam is one of 5,652 internists in Illinois
Internal medicine is Dr. Dam's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Dam is licensed in Illinois.
Specialties and state licenses
- Internal medicine, IllinoisPrimary
Internists near Dr. Dam
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 C. Dam billed Medicare for 222 services in 2022
CMS data shows 222 Medicare services from Dr. Dam across 6 procedure codes in 2022. Medicare paid $7,146 for them. Every service was in an office.
Dr. Dam's Medicare services by type, 2021 to 2022
- 2021
- 2022
- Office and hospital visits
- 2021: 9482022: 10889%
- Lab and pathology
- 2021: 2542022: 5080%
- Surgery
- 2021: 5352022: 4791%
- Tests and treatments
- 2021: 2222022: 1792%
- Drugs given in the office
- 2021: 15,9032022: 0100%
- Other services
- 2021: 1372022: 0100%
Dr. Dam compared with the Illinois median for internists, 2022
- Dr. Dam
- Illinois median
- Medicare services
- 222vs 56661% below
- Part D claims
- 700vs 2842.5 times
Medians across 5,192 internists in Illinois with Dmand AI profiles that report each measure.
Dr. Dam's most billed Medicare procedure codes, 2022
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. Dam?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Dam and other internists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William C. Dam's patients have a median age of 67
Across all payers, Dmand AI patient panel data puts Dr. Dam's median patient age at 67, with 37% women.
Dr. Dam's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women37%
- Men63%
Source: Dmand AI Patient Panel Data
Dr. William C. Dam wrote 700 Medicare Part D claims in 2022
In 2022, Dr. Dam wrote 700 Medicare Part D claims. They cover 33 drugs, with $28,627 in total drug cost. In 2021, CMS named 3,245 claims across 87 drugs.
Dr. Dam's most prescribed drugs by claims, 2022
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, 2021 to 2022
- 2021
- 2022
- Claims for drugs CMS names
- 2021: 3,2452022: 70078%
Drugs named by CMS: 33 in 2022, 87 in 2021.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. William C. Dam received $972 in industry payments from 2016 to 2021
CMS Open Payments shows 47 general payments to Dr. Dam from 11 drug and device companies from 2016 to 2021. Food and beverage make up the largest share, 98% of the total. AstraZeneca Pharmaceuticals LP paid the most, $618.
General payments to Dr. Dam by program year, 2016 to 2021
General payments to Dr. Dam by kind, 2016 to 2021
- Food and beverage$95698%
- Education$162%
Companies that paid Dr. Dam the most, 2016 to 2021
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. William C. Dam graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb)
Dr. Dam graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 1971.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. William C. Dam'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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (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 Dr. William C. Dam
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 C. Dam's NPI number?
Dr. William C. Dam's NPI number is 1447236229. It was assigned on December 22, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. William C. Dam?
Dr. William C. Dam is an internist in Mchenry, Illinois. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. William C. Dam practice?
Dr. Dam practices at 4201 Medical Center Drive, Mchenry, IL 60050. Dr. Dam's primary practice is Northwestern Medicine McHenry Hospital in Mchenry, Illinois, part of Northwestern Memorial HealthCare. Dmand AI also links Dr. Dam to 1 hospital and 1 medical group.
What is Dr. William C. Dam's office phone number?
The practice phone on file for Dr. Dam is (815) 344-5000.
What is Dr. William C. Dam's medical license number?
Dr. Dam holds Illinois license 036047653.
Which hospitals is Dr. William C. Dam affiliated with?
Dr. Dam practices at Northwestern Medicine McHenry Hospital in Mchenry, Illinois. Dmand AI links Dr. Dam to 1 more hospital.
Does Dr. William C. Dam accept Medicare?
Yes. CMS data shows Dr. Dam billed Medicare for 222 services in 2022.
What services does Dr. William C. Dam bill to Medicare?
In 2022, Dr. Dam's most billed Medicare services were office visit, established patient (99214), surgery: heart and blood vessels (36415) and office visit, established patient (99213).
Where did Dr. William C. Dam go to medical school?
Dr. Dam graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 1971.
What drugs does Dr. William C. Dam prescribe most?
In 2022 Medicare Part D data, Dr. Dam's most prescribed drugs by claims were Metformin HCl, Levothyroxine Sodium and Amlodipine Besylate.
Has Dr. William C. Dam received payments from drug or device companies?
CMS Open Payments shows $972 in general payments to Dr. Dam from 11 companies from 2016 to 2021. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Dr. William C. Dam been practicing?
Dr. Dam graduated from medical school in 1971, 55 years ago.
Selling to internal medicine practices?
See internists in Illinois by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card