Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. Mark Daniel Williams, DO

Individual provider Orthopaedic Surgery Physician · NPI 1821484163

Dr. Mark Daniel Williams, DO practises Orthopedic Surgery in Rockingham, Virginia. Graduated from Philadelphia College of Osteopathic Medicine in 2015, 11 years ago. Practices with Select Physical Therapy Holdings Inc, a 2,121-clinician group and accepts Medicare assignment. Licensed in Kentucky and Virginia.

Years since qualifying
11
Trained at
Philadelphia College of Osteopathic Medicine
Licensed in
KY, VA
In the registry since
2015
Specialties on file
2
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

2509 Pleasant Run Dr
Rockingham, VA 22801-8720
Phone: (540) 689-5500
Fax: (757) 431-7116
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Orthopaedic Surgery Physician (primary) Taxonomy 207X00000X · Licence 0102206634 (VA)
Orthopaedic Surgery Physician Taxonomy 207X00000X · Licence 04750 (KY)

Record details

NPI number1821484163
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedApril 14, 2015
Last updated in NPPESJuly 12, 2021
Certification dateJuly 12, 2021

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyORTHOPEDIC SURGERY
Medical schoolPHILADELPHIA COLLEGE OF OSTEOPATHIC MEDICINE
Graduated 2015 (11 years in practice)
Group practice Select Physical Therapy Holdings Inc — 2121 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Knee replacement 127 times · 96th percentile
Hip replacement 52 times · 88th percentile

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients475
Services billed 1,121 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Select Physical Therapy Holdings Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2121 clinicians in the practice; 12 are shown here.

Other providers in Rockingham