Dr. Michael Williamson, MD
- Medicare services, 2024
- 4,817
- Medicare patients, 2024
- 455
- Part D claims, 2024
- 230
- MIPS score, 2024
- 93
- Hospital affiliations
- 5
- Practice address
- 2799 North Washington Street, Chillicothe, MO 64601
- Practice phone
- Call (660) 646-1480
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Williamson's professional email, personal email and mobile number
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Dr. Michael Williamson is an orthopedic surgeon in Chillicothe, Missouri
Dr. Williamson practices at Hedrick Medical Center in Chillicothe, Missouri, part of BJC Health.
Dr. Williamson's NPI, 1285751859, was assigned on March 26, 2007. Dr. Williamson graduated from University of Missouri, Columbia School of Medicine in 2005. Dr. Williamson holds Missouri license 2011024871.
- NPI
- 1285751859NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7517081557
- NPI enumeration date
- March 26, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (660) 646-1480
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 47
- Medical school graduation
- 2005
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Michael Williamson practices at Hedrick Medical Center in Chillicothe, Missouri
Dr. Williamson's primary practice is Hedrick Medical Center, at 2799 North Washington Street, Chillicothe, MO 64601 in Livingston County. The practice phone is (660) 646-1480.
- Hedrick Medical Center2799 North Washington Street, Chillicothe, MO 64601 · Livingston CountyPhone(660) 646-1480
Source: Dmand AI Affiliation Data
Dr. Michael Williamson is affiliated with 8 sites of care and 2 medical groups
Dr. Williamson's primary practice is Hedrick Medical Center in Chillicothe, Missouri, part of BJC Health. Dr. Williamson is also affiliated with Saint Luke's Hospital of Kansas City. The medical group on file is Saint Luke's Medical Group. Dmand AI also links Dr. Williamson to 3 more hospitals, 2 group practices and clinics, 1 home health agency 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. Michael Williamson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Williamson practices, 8 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Hedrick Medical Center | Available with a free account |
| +7 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Michael Williamson is one of 417 orthopedic surgeons in Missouri
Orthopaedic surgery is Dr. Williamson's primary specialty in the NPI Registry, under taxonomy code 207X00000X. Dmand AI has Dr. Williamson's licenses on file in 2 states: Missouri and Pennsylvania.
Specialties and state licenses
- Orthopaedic surgery, MissouriPrimary
- Pennsylvania license
Orthopedic surgeons near Dr. Williamson
Counts of orthopedic surgeons 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. Michael Williamson billed Medicare for 4,817 services in 2024
CMS data shows 4,817 Medicare services from Dr. Williamson across 11 procedure codes in 2024, for 455 Medicare patients. Medicare paid $65,720 for them.
Dr. Williamson's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 1052024: 3,8273545%
- Office and hospital visits
- 2023: 4592024: 4948%
- Surgery
- 2023: 3132024: 3161%
- Imaging
- 2023: 1192024: 18051%
Where Dr. Williamson's Medicare services took place, 2024
- In an office4,29089%
- In a facility52711%
Dr. Williamson compared with the Missouri median for orthopedic surgeons, 2024
- Dr. Williamson
- Missouri median
- Medicare services
- 4,817vs 8495.7 times
- Medicare patients
- 455vs 23197% above
- Part D claims
- 186vs 15619% above
Medians across 414 orthopedic surgeons in Missouri with Dmand AI profiles that report each measure.
Dr. Williamson'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.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Michael Williamson treated 455 Medicare patients in 2024, average age 75
CMS counts 455 Medicare patients who saw Dr. Williamson in 2024. The largest group is 65 to 74, with 197 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 11% are also on Medicaid. Their average risk score is 1.10, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Williamson's median patient age at 72, with 58% women.
Dr. Williamson's Medicare patients by age, 2024
Dr. Williamson's Medicare patients by sex, 2024
- Women28062%
- Men17538%
Chronic conditions among Dr. Williamson's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis69%
- Diabetes34%
- Ischemic heart disease26%
- Anxiety24%
- Chronic kidney disease24%
- Mood disorders24%
Share of Medicare patients with each condition. A patient can have several.
Dr. Williamson's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women58%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Michael Williamson wrote 230 Medicare Part D claims in 2024
In 2024, Dr. Williamson wrote 230 Medicare Part D claims for 101 patients. 97% of them were for generic drugs. CMS names the drug for 186 of them, across 4 drugs with 11 or more claims each, at $1,414 in total drug cost. In 2023, CMS named 205 claims across 5 drugs.
Dr. Williamson's Part D claims by kind of drug, 2024
- Generic224 claims97%
- Brand-name and other6 claims3%
Dr. Williamson'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. Williamson's Part D claims, 2024
- Opioids77%176 of 230 claims
- Antibiotics8%19 of 230 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: 2052024: 1869%
Drugs named by CMS: 4 in 2024, 5 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. Michael Williamson scored 93 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 93 out of 100 for Dr. Williamson for performance year 2024, reported as part of a group. Dr. Williamson accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 20 procedures of knee replacement by Dr. Williamson, more than 53% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. Williamson's MIPS scores, performance year 2024
- 93of 100Final score
- 88.3of 100Quality
- 97of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Williamson ranks in Medicare procedure volume
- Knee replacement
- 53rd percentile20 procedures
- Upper limb (arm) arthroscopy (minimally invasive joint repair)
- 53rd percentile14 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Hip replacement: 1 to 10 procedures (CMS shows small counts as a range)
Lower limb (leg) arthroscopy (minimally invasive joint repair): 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. Michael Williamson received $2,841 in industry payments from 2016 to 2025
CMS Open Payments shows 43 general payments to Dr. Williamson from 4 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 70% of the total. Stryker Corporation paid the most, $1,952.
General payments to Dr. Williamson by program year, 2016 to 2025
General payments to Dr. Williamson by kind, 2016 to 2025
- Food and beverage$1,98770%
- Travel and lodging$85430%
Companies that paid Dr. Williamson 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. Michael Williamson graduated from University of Missouri, Columbia School of Medicine
Dr. Williamson graduated from University of Missouri, Columbia School of Medicine in 2005.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Michael Williamson'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)Doctors and Clinicians Utilization Data (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. Michael Williamson
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. Michael Williamson's NPI number?
Dr. Michael Williamson's NPI number is 1285751859. It was assigned on March 26, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael Williamson?
Dr. Michael Williamson is an orthopedic surgeon in Chillicothe, Missouri. The primary specialty in the NPI Registry is Orthopaedic Surgery Physician (taxonomy code 207X00000X).
Where does Dr. Michael Williamson practice?
Dr. Williamson practices at 2799 North Washington Street, Chillicothe, MO 64601. Dr. Williamson's primary practice is Hedrick Medical Center in Chillicothe, Missouri, part of BJC Health. Dmand AI also links Dr. Williamson to 3 hospitals, 2 group practices and clinics, 1 home health agency and 1 medical group.
What is Dr. Michael Williamson's office phone number?
The practice phone on file for Dr. Williamson is (660) 646-1480.
What is Dr. Michael Williamson's medical license number?
Dr. Williamson holds Missouri license 2011024871, one of the licenses on file in 2 states.
Which states has Dr. Michael Williamson been licensed in?
Dmand AI has state licenses on file for Dr. Williamson in Missouri and Pennsylvania.
Which hospitals is Dr. Michael Williamson affiliated with?
Dr. Williamson practices at Hedrick Medical Center in Chillicothe, Missouri. Dr. Williamson is also affiliated with Saint Luke's Hospital of Kansas City. Dmand AI links Dr. Williamson to 3 more hospitals.
What medical group is Dr. Michael Williamson part of?
Dr. Williamson is linked to Saint Luke's Medical Group. Dmand AI links Dr. Williamson to 1 more medical group.
Does Dr. Michael Williamson accept Medicare?
Yes. CMS data shows Dr. Williamson billed Medicare for 4,817 services in 2024, and Dr. Williamson accepts Medicare assignment.
What is Dr. Michael Williamson's MIPS score?
Dr. Williamson's MIPS final score for performance year 2024 is 93 out of 100, reported as part of a group.
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How many Medicare patients does Dr. Michael Williamson see?
CMS counts 455 Medicare patients who saw Dr. Williamson in 2024, with an average age of 75.
What services does Dr. Michael Williamson bill to Medicare?
In 2024, Dr. Williamson's most billed Medicare services were injected or infused drug (J1010), surgery: bones and joints (20610) and office visit, established patient (99214).
Where did Dr. Michael Williamson go to medical school?
Dr. Williamson graduated from University of Missouri, Columbia School of Medicine in 2005.
What drugs does Dr. Michael Williamson prescribe most?
In 2024 Medicare Part D data, Dr. Williamson's most prescribed drugs by claims were Hydrocodone-Acetaminophen, Oxycodone HCl and Oxycodone-Acetaminophen.
Has Dr. Michael Williamson received payments from drug or device companies?
CMS Open Payments shows $2,841 in general payments to Dr. Williamson from 4 companies from 2016 to 2025. The largest total came from Stryker Corporation.
How long has Dr. Michael Williamson been practicing?
Dr. Williamson graduated from medical school in 2005, 21 years ago.
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