Dr. Zachary R. Williams, MD
- Medicare services, 2024
- 5,477
- Medicare patients, 2024
- 2,737
- Part D claims, 2024
- 2,125
- Publications
- 1
- Hospital affiliations
- 5
- Practice address
- 1380 East Medical Center Drive, Saint George, UT 84790
- Practice phone
- Call (435) 251-2100
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Williams' 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. Zachary R. Williams is an internist in Saint George, Utah
Dr. Williams practices at St. George Regional Hospital in Saint George, Utah, part of Intermountain Health.
Dr. Williams' NPI, 1134372584, was assigned on October 29, 2008. Dr. Williams graduated from University of Utah School of Medicine in 2007. Dr. Williams holds New York license 258290.
- NPI
- 1134372584NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4688860422
- NPI enumeration date
- October 29, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (435) 251-2100
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 45
- Medical school graduation
- 2007
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Zachary R. Williams practices at St. George Regional Hospital in Saint George, Utah
Dr. Williams' primary practice is St. George Regional Hospital, at 1380 East Medical Center Drive, Saint George, UT 84790 in Washington County. The practice phone is (435) 251-2100.
- St. George Regional Hospital1380 East Medical Center Drive, Saint George, UT 84790 · Washington CountyPhone(435) 251-2100
Source: Dmand AI Affiliation Data
Dr. Zachary R. Williams is affiliated with 9 sites of care and 4 medical groups
Dr. Williams' primary practice is St. George Regional Hospital in Saint George, Utah, part of Intermountain Health. Dr. Williams is also affiliated with Memorial Hospital in Belleville. The medical group on file is Intermountain Health. Dmand AI also links Dr. Williams to 3 more hospitals, 3 medical groups, 2 group practices and clinics, 1 behavioral health center and 1 rural health clinic, 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. Zachary R. Williams' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Williams practices, 9 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| St. George Regional Hospital | Available with a free account |
| +8 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Zachary R. Williams is one of 663 internists in Utah
Internal medicine is Dr. Williams' primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dmand AI has Dr. Williams' licenses on file in 2 states: New York and Utah.
Specialties and state licenses
- Internal medicine, New YorkPrimary
- Utah license
Clinical focus
Dmand AI lists angioplasty, atrial fibrillation and flutter, cardiac catheterization, cardiomyopathy, cerebrovascular disease, chronic hypertension, circulation problems and coronary artery disease among the conditions Dr. Williams treats.
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. Zachary R. Williams billed Medicare for 5,477 services in 2024
CMS data shows 5,477 Medicare services from Dr. Williams across 25 procedure codes in 2024, for 2,737 Medicare patients. Medicare paid $193,306 for them.
Dr. Williams' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 4,0122024: 4,3619%
- Imaging
- 2023: 4892024: 66937%
- Office and hospital visits
- 2023: 5742024: 43225%
- Surgery
- 2023: 272024: 1544%
- Other services
- 2023: 242024: 0100%
Where Dr. Williams' Medicare services took place, 2024
- In an office2,46445%
- In a facility3,01355%
Dr. Williams compared with the Utah median for internists, 2024
- Dr. Williams
- Utah median
- Medicare services
- 5,477vs 44612.3 times
- Medicare patients
- 2,737vs 19114.3 times
- Part D claims
- 1,942vs 2338.3 times
Medians across 623 internists in Utah 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.
Need commercial claims for Dr. Williams?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Williams and other internists in Utah.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Zachary R. Williams treated 2,737 Medicare patients in 2024, average age 77
CMS counts 2,737 Medicare patients who saw Dr. Williams in 2024. The largest group is 75 to 84, with 1,252 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 4% are also on Medicaid. Their average risk score is 1.55, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Williams' median patient age at 75, with 46% women.
Dr. Williams' Medicare patients by age, 2024
Dr. Williams' Medicare patients by sex, 2024
- Women1,22245%
- Men1,51555%
Chronic conditions among Dr. Williams' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis52%
- Ischemic heart disease52%
- Atrial fibrillation41%
- Chronic kidney disease34%
- Heart failure34%
- Diabetes29%
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 75
Patient panel by sex, all payers
- Women46%
- Men53%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Zachary R. Williams wrote 2,125 Medicare Part D claims in 2024
In 2024, Dr. Williams wrote 2,125 Medicare Part D claims for 440 patients. 84% of them were for generic drugs. CMS names the drug for 1,942 of them, across 30 drugs with 11 or more claims each, at $374,266 in total drug cost. In 2023, CMS named 2,107 claims across 33 drugs.
Dr. Williams' Part D claims by kind of drug, 2024
- Generic1,792 claims84%
- Brand-name333 claims16%
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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2,1072024: 1,9428%
Drugs named by CMS: 30 in 2024, 33 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. Zachary R. Williams ranks in the 84th percentile for pacemaker insertion or repair in Medicare
Dr. Williams accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 39 procedures of pacemaker insertion or repair by Dr. Williams, more than 84% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Williams ranks in Medicare procedure volume
- Pacemaker insertion or repair
- 84th percentile39 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Zachary R. Williams has 1 publication on record
Dmand AI links 1 paper to Dr. Williams in 2017. Dr. Williams' most frequent co-author is Karl Q. Schwarz, MD.
Dr. Williams' most frequent co-authors
Recent publications by Dr. Williams
See who Dr. Williams researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Williams 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. Zachary R. Williams received $2,741 in industry payments from 2017 to 2025
CMS Open Payments shows 24 general payments to Dr. Williams from 6 drug and device companies from 2017 to 2025. Travel and lodging make up the largest share, 69% of the total. Edwards Lifesciences Corporation paid the most, $2,238.
General payments to Dr. Williams by program year, 2017 to 2025
General payments to Dr. Williams by kind, 2017 to 2025
- Travel and lodging$1,90069%
- Food and beverage$84131%
Companies that paid Dr. Williams the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Zachary R. Williams graduated from University of Utah School of Medicine
Dr. Williams graduated from University of Utah School of Medicine in 2007.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. Zachary R. Williams accepts plans from 18 insurance carriers
Dr. Williams is in network with 18 carriers, including Elevance, Excellus BlueCross BlueShield and United Healthcare. PPO plans come from the most carriers, 12. Check the plan with the practice before a visit.
- Elevance
- Excellus BlueCross BlueShield
- United Healthcare
- Blue Cross Blue Shield of Michigan
- HCSC
- Molina
- Aetna
- Alliant Health Plans
- +10 more carriersWith a free account
Plan types Dr. Williams accepts, by number of carriers
- PPO12
- Medicare10
- HMO9
- EPO4
- POS4
- Medicaid2
Source: Dmand AI Insurance Network Data
Sources for Dr. Zachary R. 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)Doctors and Clinicians Utilization Data (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 |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Zachary R. 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. Zachary R. Williams' NPI number?
Dr. Zachary R. Williams' NPI number is 1134372584. It was assigned on October 29, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Zachary R. Williams?
Dr. Zachary R. Williams is an internist in Saint George, Utah. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Zachary R. Williams practice?
Dr. Williams practices at 1380 East Medical Center Drive, Saint George, UT 84790. Dr. Williams' primary practice is St. George Regional Hospital in Saint George, Utah, part of Intermountain Health. Dmand AI also links Dr. Williams to 3 hospitals, 3 medical groups, 2 group practices and clinics, 1 behavioral health center and 1 rural health clinic.
What is Dr. Zachary R. Williams' office phone number?
The practice phone on file for Dr. Williams is (435) 251-2100.
What is Dr. Zachary R. Williams' medical license number?
Dr. Williams holds New York license 258290, one of the licenses on file in 2 states.
Which states has Dr. Zachary R. Williams been licensed in?
Dmand AI has state licenses on file for Dr. Williams in New York and Utah.
Which hospitals is Dr. Zachary R. Williams affiliated with?
Dr. Williams practices at St. George Regional Hospital in Saint George, Utah. Dr. Williams is also affiliated with Memorial Hospital in Belleville. Dmand AI links Dr. Williams to 3 more hospitals.
What medical group is Dr. Zachary R. Williams part of?
Dr. Williams is linked to Intermountain Health. Dmand AI links Dr. Williams to 3 more medical groups.
Does Dr. Zachary R. Williams accept Medicare?
Yes. CMS data shows Dr. Williams billed Medicare for 5,477 services in 2024, and Dr. Williams accepts Medicare assignment.
How many Medicare patients does Dr. Zachary R. Williams see?
CMS counts 2,737 Medicare patients who saw Dr. Williams in 2024, with an average age of 77.
Show 8 more questionsShow fewer questions
What services does Dr. Zachary R. Williams bill to Medicare?
In 2024, Dr. Williams' most billed Medicare services were heart test or procedure (93306), heart test or procedure (93010) and heart test or procedure (93294).
Where did Dr. Zachary R. Williams go to medical school?
Dr. Williams graduated from University of Utah School of Medicine in 2007.
What drugs does Dr. Zachary R. Williams prescribe most?
In 2024 Medicare Part D data, Dr. Williams' most prescribed drugs by claims were Eliquis, Metoprolol Succinate and Atorvastatin Calcium.
Has Dr. Zachary R. Williams received payments from drug or device companies?
CMS Open Payments shows $2,741 in general payments to Dr. Williams from 6 companies from 2017 to 2025. The largest total came from Edwards Lifesciences Corporation.
How long has Dr. Zachary R. Williams been practicing?
Dr. Williams graduated from medical school in 2007, 19 years ago.
Does Dr. Zachary R. Williams do research?
Dmand AI links 1 publication to Dr. Williams.
Who does Dr. Zachary R. Williams publish with?
Dr. Williams' most frequent co-authors are Karl Q. Schwarz, MD (1 shared paper).
What insurance does Dr. Zachary R. Williams accept?
Dr. Williams is in network with 18 carriers, including Elevance, Excellus BlueCross BlueShield and United Healthcare. PPO plans come from the most carriers, 12. Check the plan with the practice before a visit.
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