Dr. Anthony Paul Williamson, MD
- Medicare services, 2024
- 539
- Medicare patients, 2024
- 240
- Part D claims, 2024
- 1,002
- MIPS score, 2024
- 84
- Hospital affiliations
- 3
- Practice address
- 2475 Broadway, Helena, MT 59601
- Practice phone
- Call (406) 442-2480
- 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. Anthony Paul Williamson is a neurologist in Helena, Montana
Dr. Williamson practices at St. Peter's Health Regional Medical Center in Helena, Montana, part of St. Peter's Health.
Dr. Williamson's NPI, 1609829845, was assigned on May 18, 2006. Dr. Williamson graduated from University of Arkansas College of Medicine in 1998. Dr. Williamson holds Montana license 10121.
- NPI
- 1609829845NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9436293560
- NPI enumeration date
- May 18, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (406) 442-2480
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 54
- Medical school graduation
- 1998
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Anthony Paul Williamson practices at St. Peter's Health Regional Medical Center in Helena, Montana
Dr. Williamson's primary practice is St. Peter's Health Regional Medical Center, at 2475 Broadway, Helena, MT 59601 in Lewis And Clark County. The practice phone is (406) 442-2480.
- St. Peter's Health Regional Medical Center2475 Broadway, Helena, MT 59601 · Lewis And Clark CountyPhone(406) 442-2480
Source: Dmand AI Affiliation Data
Dr. Anthony Paul Williamson is affiliated with 4 sites of care and 2 medical groups
Dr. Williamson's primary practice is St. Peter's Health Regional Medical Center in Helena, Montana, part of St. Peter's Health. Dr. Williamson is also affiliated with St. James Hospital. The medical group on file is St. Peter's Health Medical Group. Dmand AI also links Dr. Williamson to 1 more hospital, 1 group practice or clinic 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. Anthony Paul Williamson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Williamson practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| St. Peter's Health Regional Medical Center | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Anthony Paul Williamson is one of 57 neurologists in Montana
Neurology is Dr. Williamson's primary specialty in the NPI Registry, under taxonomy code 2084N0400X. Dr. Williamson is licensed in Montana.
Specialties and state licenses
- Neurology, MontanaPrimary
Neurologists near Dr. Williamson
Counts of neurologists 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. Anthony Paul Williamson billed Medicare for 539 services in 2024
CMS data shows 539 Medicare services from Dr. Williamson across 8 procedure codes in 2024, for 240 Medicare patients. Medicare paid $49,708 for them.
Dr. Williamson's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,0802024: 36566%
- Tests and treatments
- 2023: 3202024: 17446%
- Drugs given in the office
- 2023: 4,5802024: 0100%
Where Dr. Williamson's Medicare services took place, 2024
- In an office5510%
- In a facility48490%
Dr. Williamson compared with the Montana median for neurologists, 2024
- Dr. Williamson
- Montana median
- Medicare services
- 539vs 34954% above
- Medicare patients
- 240vs 18728% above
- Part D claims
- 798vs 46472% above
Medians across 56 neurologists in Montana 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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Williamson and other neurologists in Montana.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Anthony Paul Williamson treated 240 Medicare patients in 2024, average age 73
CMS counts 240 Medicare patients who saw Dr. Williamson in 2024. The largest group is 75 to 84, with 111 patients. 68% of them have high cholesterol, and 67% have high blood pressure. 14% are also on Medicaid. Their average risk score is 1.19, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Williamson's median patient age at 74, with 55% women.
Dr. Williamson's Medicare patients by age, 2024
Dr. Williamson's Medicare patients by sex, 2024
- Women12653%
- Men11448%
Chronic conditions among Dr. Williamson's Medicare patients, 2024
- High cholesterol68%
- High blood pressure67%
- Arthritis55%
- Mood disorders40%
- Anxiety35%
- Depression35%
- Diabetes25%
- Ischemic heart disease20%
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 74
Patient panel by sex, all payers
- Women55%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Anthony Paul Williamson wrote 1,002 Medicare Part D claims in 2024
In 2024, Dr. Williamson wrote 1,002 Medicare Part D claims for 310 patients. 92% of them were for generic drugs. CMS names the drug for 798 of them, across 20 drugs with 11 or more claims each, at $78,139 in total drug cost. In 2023, CMS named 1,589 claims across 36 drugs.
Dr. Williamson's Part D claims by kind of drug, 2024
- Generic923 claims92%
- Brand-name79 claims8%
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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,5892024: 79850%
Drugs named by CMS: 20 in 2024, 36 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. Anthony Paul Williamson scored 84 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 84 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 lists Dr. Williamson as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Williamson's MIPS scores, performance year 2024
- 84of 100Final score
- 71of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 75of 100Cost
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. Anthony Paul Williamson received $2,285 in industry payments from 2016 to 2025
CMS Open Payments shows 154 general payments to Dr. Williamson from 26 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 98% of the total. Biogen, Inc. paid the most, $440.
General payments to Dr. Williamson by program year, 2016 to 2025
General payments to Dr. Williamson by kind, 2016 to 2025
- Food and beverage$2,24498%
- Speaker and faculty fees$392%
- Education$20%
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. Anthony Paul Williamson graduated from University of Arkansas College of Medicine
Dr. Williamson graduated from University of Arkansas College of Medicine in 1998.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Anthony Paul 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) |
| 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. Anthony Paul 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. Anthony Paul Williamson's NPI number?
Dr. Anthony Paul Williamson's NPI number is 1609829845. It was assigned on May 18, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Anthony Paul Williamson?
Dr. Anthony Paul Williamson is a neurologist in Helena, Montana. The primary specialty in the NPI Registry is Neurology Physician (taxonomy code 2084N0400X).
Where does Dr. Anthony Paul Williamson practice?
Dr. Williamson practices at 2475 Broadway, Helena, MT 59601. Dr. Williamson's primary practice is St. Peter's Health Regional Medical Center in Helena, Montana, part of St. Peter's Health. Dmand AI also links Dr. Williamson to 1 hospital, 1 group practice or clinic and 1 medical group.
What is Dr. Anthony Paul Williamson's office phone number?
The practice phone on file for Dr. Williamson is (406) 442-2480.
What is Dr. Anthony Paul Williamson's medical license number?
Dr. Williamson holds Montana license 10121.
Which hospitals is Dr. Anthony Paul Williamson affiliated with?
Dr. Williamson practices at St. Peter's Health Regional Medical Center in Helena, Montana. Dr. Williamson is also affiliated with St. James Hospital. Dmand AI links Dr. Williamson to 1 more hospital.
What medical group is Dr. Anthony Paul Williamson part of?
Dr. Williamson is linked to St. Peter's Health Medical Group. Dmand AI links Dr. Williamson to 1 more medical group.
Does Dr. Anthony Paul Williamson accept Medicare?
Yes. CMS data shows Dr. Williamson billed Medicare for 539 services in 2024, and Dr. Williamson accepts Medicare assignment.
Does Dr. Anthony Paul Williamson offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Williamson as offering telehealth services.
What is Dr. Anthony Paul Williamson's MIPS score?
Dr. Williamson's MIPS final score for performance year 2024 is 84 out of 100, reported as part of a group.
Show 6 more questionsShow fewer questions
How many Medicare patients does Dr. Anthony Paul Williamson see?
CMS counts 240 Medicare patients who saw Dr. Williamson in 2024, with an average age of 73.
What services does Dr. Anthony Paul Williamson bill to Medicare?
In 2024, Dr. Williamson's most billed Medicare services were office visit, new patient (99205), office visit, established patient (99215) and office visit, established patient (99214).
Where did Dr. Anthony Paul Williamson go to medical school?
Dr. Williamson graduated from University of Arkansas College of Medicine in 1998.
What drugs does Dr. Anthony Paul Williamson prescribe most?
In 2024 Medicare Part D data, Dr. Williamson's most prescribed drugs by claims were Memantine HCl, Gabapentin and Memantine HCl ER.
Has Dr. Anthony Paul Williamson received payments from drug or device companies?
CMS Open Payments shows $2,285 in general payments to Dr. Williamson from 26 companies from 2016 to 2025. The largest total came from Biogen, Inc.
How long has Dr. Anthony Paul Williamson been practicing?
Dr. Williamson graduated from medical school in 1998, 28 years ago.
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