Dr. John Christopher Williams, MD
- Medicare services, 2024
- 541
- Medicare patients, 2024
- 183
- Part D claims, 2024
- 10,081
- MIPS score, 2024
- 95
- Hospital affiliations
- 2
- Practice address
- 525 Airport Rd, Oneida, WI 54155
- Practice phone
- Call (920) 869-2711
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Oneida Comprehensive Health (Airport Rd)
Tribal Health Clinic · Oneida, Wisconsin
Find Dr. Williams' professional email, personal email and mobile number
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Dr. John Christopher Williams is an internist in Oneida, Wisconsin
Dr. Williams practices at Oneida Comprehensive Health (Airport Rd) in Oneida, Wisconsin.
Dr. Williams' NPI, 1295717668, was assigned on November 18, 2005. Dr. Williams graduated from Indiana University School of Medicine in 1989. Dr. Williams holds Wisconsin license 49093-020.
- NPI
- 1295717668NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9032181136
- NPI enumeration date
- November 18, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (920) 869-2711
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 63
- Medical school graduation
- 1989
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Christopher Williams practices at Oneida Comprehensive Health (Airport Rd) in Oneida, Wisconsin
Dr. Williams' primary practice is Oneida Comprehensive Health (Airport Rd), at 525 Airport Rd, Oneida, WI 54155. The practice phone is (920) 869-2711.
- Oneida Comprehensive Health (Airport Rd)525 Airport Rd, Oneida, WI 54155Phone(920) 869-2711
Source: Dmand AI Affiliation Data
Dr. John Christopher Williams is affiliated with 4 sites of care and 1 medical group
Dr. Williams' primary practice is Oneida Comprehensive Health (Airport Rd) in Oneida, Wisconsin. Dr. Williams is also affiliated with HSHS St. Vincent Hospital. The medical group on file is Oneida Community Health Center. Dmand AI also links Dr. Williams to 1 more hospital and 1 group practice or clinic, each named with a free account. Dr. Williams' employer is on file too: a government & correctional health.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John Christopher Williams' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Williams practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Oneida Comprehensive Health (Airport Rd) | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Christopher Williams is one of 1,675 internists in Wisconsin
Internal medicine is Dr. Williams' primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Williams is licensed in Wisconsin.
Specialties and state licenses
- Internal medicine, WisconsinPrimary
Internists near Dr. Williams
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. John Christopher Williams billed Medicare for 541 services in 2024
CMS data shows 541 Medicare services from Dr. Williams across 10 procedure codes in 2024, for 183 Medicare patients. Medicare paid $25,356 for them. Every service was in an office.
Dr. Williams' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2382024: 20813%
- Surgery
- 2023: 2162024: 2026%
- Tests and treatments
- 2023: 512024: 51No change
- Lab and pathology
- 2023: 2252024: 4580%
- Other services
- 2023: 382024: 358%
Dr. Williams compared with the Wisconsin median for internists, 2024
- Dr. Williams
- Wisconsin median
- Medicare services
- 541vs 45718% above
- Medicare patients
- 183vs 1998% below
- Part D claims
- 9,454vs 43321.8 times
Medians across 1,658 internists in Wisconsin with Dmand AI profiles that report each measure.
Dr. Williams' 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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Williams and other internists in Wisconsin.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Christopher Williams treated 183 Medicare patients in 2024, average age 75
CMS counts 183 Medicare patients who saw Dr. Williams in 2024. The largest group is 65 to 74, with 78 patients. 75% of them have high cholesterol, and 74% have high blood pressure. 11% are also on Medicaid. Their average risk score is 1.14, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Williams' median patient age at 73, with 41% women.
Dr. Williams' Medicare patients by age, 2024
Dr. Williams' Medicare patients by sex, 2024
- Women6435%
- Men11965%
Chronic conditions among Dr. Williams' Medicare patients, 2024
- High cholesterol75%
- High blood pressure74%
- Arthritis44%
- Ischemic heart disease34%
- Diabetes30%
- Chronic kidney disease28%
- Anxiety26%
- Cancer20%
Share of Medicare patients with each condition. A patient can have several.
Dr. Williams' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
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. John Christopher Williams wrote 10,081 Medicare Part D claims in 2024
In 2024, Dr. Williams wrote 10,081 Medicare Part D claims for 686 patients. 92% of them were for generic drugs. CMS names the drug for 9,454 of them, across 131 drugs with 11 or more claims each, at $302,967 in total drug cost. In 2023, CMS named 10,229 claims across 136 drugs.
Dr. Williams' Part D claims by kind of drug, 2024
- Generic9,253 claims92%
- Brand-name804 claims8%
- Other24 claims0%
Dr. Williams' 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. Williams' Part D claims, 2024
- Opioids2%230 of 10,081 claims
- Antibiotics1%97 of 10,081 claims
- Antipsychotics, patients 65 and over0%48 of 10,081 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: 10,2292024: 9,4548%
Drugs named by CMS: 131 in 2024, 136 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. John Christopher Williams scored 95 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 95 out of 100 for Dr. Williams for performance year 2024, reported through an alternative payment model (APM). Dr. Williams accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Williams' MIPS scores, performance year 2024
- 95of 100Final score
- 86of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. John Christopher Williams received $2,270 in industry payments from 2016 to 2025
CMS Open Payments shows 26 general payments to Dr. Williams from 12 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Pfizer Inc. paid the most, $619.
General payments to Dr. Williams by program year, 2016 to 2025
Companies that paid Dr. Williams 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. John Christopher Williams graduated from Indiana University School of Medicine
Dr. Williams graduated from Indiana University School of Medicine in 1989.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John Christopher Williams'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)Clinician Public Reporting: Overall MIPS Performance (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. John Christopher Williams
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. John Christopher Williams' NPI number?
Dr. John Christopher Williams' NPI number is 1295717668. It was assigned on November 18, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. John Christopher Williams?
Dr. John Christopher Williams is an internist in Oneida, Wisconsin. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. John Christopher Williams practice?
Dr. Williams practices at 525 Airport Rd, Oneida, WI 54155. Dr. Williams' primary practice is Oneida Comprehensive Health (Airport Rd) in Oneida, Wisconsin. Dmand AI also links Dr. Williams to 1 hospital and 1 group practice or clinic.
What is Dr. John Christopher Williams' office phone number?
The practice phone on file for Dr. Williams is (920) 869-2711.
What is Dr. John Christopher Williams' medical license number?
Dr. Williams holds Wisconsin license 49093-020.
Which hospitals is Dr. John Christopher Williams affiliated with?
Dr. Williams is affiliated with HSHS St. Vincent Hospital. Dmand AI links Dr. Williams to 1 more hospital.
What medical group is Dr. John Christopher Williams part of?
Dr. Williams is linked to Oneida Community Health Center.
Does Dr. John Christopher Williams accept Medicare?
Yes. CMS data shows Dr. Williams billed Medicare for 541 services in 2024, and Dr. Williams accepts Medicare assignment.
What is Dr. John Christopher Williams' MIPS score?
Dr. Williams' MIPS final score for performance year 2024 is 95 out of 100, reported through an alternative payment model (APM).
How many Medicare patients does Dr. John Christopher Williams see?
CMS counts 183 Medicare patients who saw Dr. Williams in 2024, with an average age of 75.
Show 5 more questionsShow fewer questions
What services does Dr. John Christopher Williams bill to Medicare?
In 2024, Dr. Williams' most billed Medicare services were surgery: heart and blood vessels (36415), office visit, established patient (99214) and office visit, established patient (99213).
Where did Dr. John Christopher Williams go to medical school?
Dr. Williams graduated from Indiana University School of Medicine in 1989.
What drugs does Dr. John Christopher Williams prescribe most?
In 2024 Medicare Part D data, Dr. Williams' most prescribed drugs by claims were Atorvastatin Calcium, Levothyroxine Sodium and Amlodipine Besylate.
Has Dr. John Christopher Williams received payments from drug or device companies?
CMS Open Payments shows $2,270 in general payments to Dr. Williams from 12 companies from 2016 to 2025. The largest total came from Pfizer Inc.
How long has Dr. John Christopher Williams been practicing?
Dr. Williams graduated from medical school in 1989, 37 years ago.
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