Dr. Mark Daniel Williams, DO
- Medicare services, 2024
- 1,057
- Medicare patients, 2024
- 475
- Part D claims, 2024
- 136
- Hospital affiliations
- 2
- Industry payments
- $4,319
- Practice address
- 2010 Health Campus Drive, Harrisonburg, VA 22801
- Practice phone
- Call (540) 689-1000
- 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. Mark Daniel Williams is an orthopedic surgeon in Rockingham, Virginia
Dr. Williams practices at Sentara RMH Medical Center in Harrisonburg, Virginia, part of Sentara Health.
Dr. Williams' NPI, 1821484163, was assigned on April 14, 2015. Dr. Williams graduated from Philadelphia College of Osteopathic Medicine in 2015. Dr. Williams holds Virginia license 0102206634.
- NPI
- 1821484163NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0941551634
- NPI enumeration date
- April 14, 2015
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (540) 689-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 37
- Medical school graduation
- 2015
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark Daniel Williams practices at Sentara RMH Medical Center in Harrisonburg, Virginia
Dr. Williams' primary practice is Sentara RMH Medical Center, at 2010 Health Campus Drive, Harrisonburg, VA 22801 in Harrisonburg City. The practice phone is (540) 689-1000.
- Sentara RMH Medical Center2010 Health Campus Drive, Harrisonburg, VA 22801 · Harrisonburg CityPhone(540) 689-1000
Source: Dmand AI Affiliation Data
Dr. Mark Daniel Williams is affiliated with 6 sites of care and 2 medical groups
Dr. Williams' primary practice is Sentara RMH Medical Center in Harrisonburg, Virginia, part of Sentara Health. Dr. Williams is also affiliated with Sentara Martha Jefferson Hospital. The medical group on file is Sentara RMH Medical Group. Dmand AI also links Dr. Williams to 2 more group practices and clinics, 1 home health agency, 1 skilled nursing facility 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. Mark Daniel Williams' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Williams practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Sentara RMH Medical Center | Available with a free account |
| +5 more sites 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 Sentara Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Mark Daniel Williams is one of 498 orthopedic surgeons in Virginia
Orthopaedic surgery is Dr. Williams' primary specialty in the NPI Registry, under taxonomy code 207X00000X. Dmand AI has Dr. Williams' licenses on file in 2 states: Virginia and Kentucky.
Specialties and state licenses
- Orthopaedic surgery, VirginiaPrimary
- Kentucky license
Orthopedic surgeons near Dr. Williams
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. Mark Daniel Williams billed Medicare for 1,057 services in 2024
CMS data shows 1,057 Medicare services from Dr. Williams across 14 procedure codes in 2024, for 475 Medicare patients. Medicare paid $193,115 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Williams' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5362024: 60713%
- Surgery
- 2023: 2362024: 28922%
- Other services
- 2023: 522024: 161210%
Dr. Williams compared with the Virginia median for orthopedic surgeons, 2024
- Dr. Williams
- Virginia median
- Medicare services
- 1,057vs 1,17010% below
- Medicare patients
- 475vs 37028% above
- Part D claims
- 103vs 12115% below
Medians across 475 orthopedic surgeons in Virginia 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 orthopedic surgeons in Virginia.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark Daniel Williams treated 475 Medicare patients in 2024, average age 75
CMS counts 475 Medicare patients who saw Dr. Williams in 2024. The largest group is 65 to 74, with 230 patients. 75% of them have arthritis, and 75% have high blood pressure. 6% are also on Medicaid. Their average risk score is 1.04, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Williams' median patient age at 70, with 60% women.
Dr. Williams' Medicare patients by age, 2024
Dr. Williams' Medicare patients by sex, 2024
- Women31165%
- Men16435%
Chronic conditions among Dr. Williams' Medicare patients, 2024
- Arthritis75%
- High blood pressure75%
- High cholesterol75%
- Mood disorders34%
- Anxiety33%
- Depression33%
- Diabetes27%
- Chronic kidney disease21%
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 70
Patient panel by sex, all payers
- Women60%
- Men39%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mark Daniel Williams wrote 136 Medicare Part D claims in 2024
In 2024, Dr. Williams wrote 136 Medicare Part D claims for 91 patients. 99% of them were for generic drugs. CMS names the drug for 103 of them, across 5 drugs with 11 or more claims each, at $343 in total drug cost. In 2023, CMS named 210 claims across 7 drugs.
Dr. Williams' Part D claims by kind of drug, 2024
- Generic135 claims99%
- Brand-name and other1 claims1%
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
- Opioids38%51 of 136 claims
- Antibiotics24%33 of 136 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: 2102024: 10351%
Drugs named by CMS: 5 in 2024, 7 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. Mark Daniel Williams ranks in the 95th percentile for knee replacement in Medicare
Dr. Williams accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 122 procedures of knee replacement by Dr. Williams, more than 95% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Williams ranks in Medicare procedure volume
- Knee replacement
- 95th percentile122 procedures
- Hip replacement
- 85th percentile44 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)
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. Mark Daniel Williams received $4,319 in industry payments from 2016 to 2024
CMS Open Payments shows 63 general payments to Dr. Williams from 15 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 67% of the total. Medical Device Business Services, Inc. paid the most, $1,641.
General payments to Dr. Williams by program year, 2016 to 2024
General payments to Dr. Williams by kind, 2016 to 2024
- Food and beverage$2,90167%
- Travel and lodging$1,17727%
- Education$2416%
Companies that paid Dr. Williams the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mark Daniel Williams graduated from Philadelphia College of Osteopathic Medicine
Dr. Williams graduated from Philadelphia College of Osteopathic Medicine in 2015.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark Daniel 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) |
| 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. Mark Daniel 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. Mark Daniel Williams' NPI number?
Dr. Mark Daniel Williams' NPI number is 1821484163. It was assigned on April 14, 2015, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark Daniel Williams?
Dr. Mark Daniel Williams is an orthopedic surgeon in Rockingham, Virginia. The primary specialty in the NPI Registry is Orthopaedic Surgery Physician (taxonomy code 207X00000X).
Where does Dr. Mark Daniel Williams practice?
Dr. Williams practices at 2010 Health Campus Drive, Harrisonburg, VA 22801. Dr. Williams' primary practice is Sentara RMH Medical Center in Harrisonburg, Virginia, part of Sentara Health. Dmand AI also links Dr. Williams to 2 group practices and clinics, 1 home health agency, 1 skilled nursing facility and 1 medical group.
What is Dr. Mark Daniel Williams' office phone number?
The practice phone on file for Dr. Williams is (540) 689-1000.
What is Dr. Mark Daniel Williams' medical license number?
Dr. Williams holds Virginia license 0102206634, one of the licenses on file in 2 states.
Which states has Dr. Mark Daniel Williams been licensed in?
Dmand AI has state licenses on file for Dr. Williams in Virginia and Kentucky.
Which hospitals is Dr. Mark Daniel Williams affiliated with?
Dr. Williams practices at Sentara RMH Medical Center in Harrisonburg, Virginia. Dr. Williams is also affiliated with Sentara Martha Jefferson Hospital.
What medical group is Dr. Mark Daniel Williams part of?
Dr. Williams is linked to Sentara RMH Medical Group. Dmand AI links Dr. Williams to 1 more medical group.
Does Dr. Mark Daniel Williams accept Medicare?
Yes. CMS data shows Dr. Williams billed Medicare for 1,057 services in 2024, and Dr. Williams accepts Medicare assignment.
How many Medicare patients does Dr. Mark Daniel Williams see?
CMS counts 475 Medicare patients who saw Dr. Williams in 2024, with an average age of 75.
Show 5 more questionsShow fewer questions
What services does Dr. Mark Daniel Williams bill to Medicare?
In 2024, Dr. Williams' most billed Medicare services were office visit, established patient (99213), office visit, established patient (99215) and surgery: bones and joints (20610).
Where did Dr. Mark Daniel Williams go to medical school?
Dr. Williams graduated from Philadelphia College of Osteopathic Medicine in 2015.
What drugs does Dr. Mark Daniel Williams prescribe most?
In 2024 Medicare Part D data, Dr. Williams' most prescribed drugs by claims were Amoxicillin, Meloxicam and Oxycodone HCl.
Has Dr. Mark Daniel Williams received payments from drug or device companies?
CMS Open Payments shows $4,319 in general payments to Dr. Williams from 15 companies from 2016 to 2024. The largest total came from Medical Device Business Services, Inc.
How long has Dr. Mark Daniel Williams been practicing?
Dr. Williams graduated from medical school in 2015, 11 years ago.
Selling to orthopaedic surgery practices?
See orthopedic surgeons in Virginia 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