DR. MARK DANIEL WILLIAMS D.O.
NPI 1821484163
Orthopaedic Surgery in Rockingham, VA

Q: What is Mark Williams's NPI number?

The NPI number for Mark Williams is 1821484163. It was assigned to this individual provider in the NPPES registry on April 14, 2015.

Q: What is Mark Williams's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.

Q: When was this NPI record last updated?

The NPPES record for Mark Williams was last updated on July 12, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since April 14, 2015PECOS EnrolledAccepts Medicare Assignment

95.11/100

CMS Quality Rating

2509 PLEASANT RUN DR, ROCKINGHAM, VA 22801(540) 689-5500(757) 431-7116 Get Directions Write a Review

NPPES record last updated: July 12, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jul 12, 2021, Jun 3, 2021, Sep 2, 2020 and 3 more (6 updates tracked since 2020).

On this page

About Dr. Mark Daniel Williams D.o. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. MARK DANIEL WILLIAMS D.O. (NPI 1821484163) is an individual orthopaedic surgery provider in Rockingham, Virginia, licensed in Virginia (0102206634) and active in the NPI registry since April 2015. He is enrolled in Medicare PECOS, is affiliated with Sentara Rmh Medical Center, and is a graduate of Philadelphia College Of Osteopathic Medicine (2015).

NPPES Registry Identity

NPI1821484163

Entity TypeIndividualMale

Primary Taxonomy207X00000X

Provider Legal NameDR. MARK DANIEL WILLIAMSCredential: D.O.

Location Address2509 PLEASANT RUN DRRockingham, VA 22801-8720

Mailing Address2509 Pleasant Run DrRockingham, VA 22801-8720 · (540) 689-5500 · Fax (757) 431-7116

Phone(540) 689-5500

Fax(757) 431-7116

Sole ProprietorNo

Medical School CMSPhiladelphia College Of Osteopathic MedicineGraduated 2015

Enumeration DateApril 14, 2015

Last NPPES UpdateJuly 12, 20216 updates tracked since enumeration

NPPES CertifiedJuly 12, 2021

✔ NPI 1821484163 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOrthopaedic SurgeryAllopathic & Osteopathic Physicians

Taxonomy Code207X00000X

Licenses✔ Licensed in VA · 0102206634✔ Licensed in KY · 04750

Definition

An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.

2509 PLEASANT RUN DR, Rockingham, VA 22801

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Other Identifiers 3

Medicaid1821484163VA

Medicaid7100688460KY

Medicaid300041818IN

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Mark Daniel Williams D.o. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID941551634

PECOS Enrollment IDI20210811000741

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Mark Williams reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Rmh Medical Group LLC

0.2 mi

General Practice

2006 HEALTH CAMPUS DR
Rockingham, VA 22801

Reassigned Medicare billing, Virginia enrollment
369 clinicians in this Medicare group

NPI 1669844908 (540) 689-5618

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 14

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

208 services164 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

149 services141 patients

Aspiration and/or injection of fluid from large joint 20610

This procedure involves using a needle to remove (aspiration) or introduce (injection) fluid into a large joint like the knee or hip. It can help diagnose conditions, relieve discomfort, or deliver medication directly to the joint.

146 services102 patients

Replacement of knee joint, both sides of knee 27447

A bilateral knee joint replacement is a procedure where the damaged parts of both your knee joints are replaced with artificial parts. It aims to relieve pain and improve mobility. The process involves a surgical operation under anesthesia.

97 services95 patients

Musculoskeletal surgical navigational orthopedic operation using imaging guidance 0055T

This is a precise orthopedic surgery using advanced imaging technology. It helps the surgeon navigate through your musculoskeletal system (bones, muscles, and joints) accurately. This method reduces the risk of damage to nearby areas and aids in a more successful operation.

95 services93 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

92 services90 patients

Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and G0180

This is a service where a doctor or authorized practitioner certifies that you require Medicare-covered home health services. They will communicate with the home health agency and review reports on your health status to ensure you receive appropriate care. This does not involve an in-person visit.

66 services59 patients

Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212

This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.

46 services43 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

43 services43 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

39 services39 patients

Replacement of thigh bone and hip joint with prosthesis 27130

This procedure, known as hip arthroplasty, involves replacing your damaged thigh bone and hip joint with artificial parts, called a prosthesis. It helps relieve pain, improve mobility, and enhance your quality of life.

34 services32 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

16 services16 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

14 services14 patients

Treatment of broken neck of thigh bone with bone implant 27245

This procedure involves repairing a fractured thigh bone by inserting a bone implant. The implant helps stabilize the bone, allowing it to heal correctly. It's performed under anesthesia and requires a hospital stay for recovery.

12 services12 patients

Hospital Affiliations CMS Care Compare 4

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Sentara Rmh Medical Center

Acute Care Hospitals · Harrisonburg, VA

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number490004

Location2010 Health Campus DriveHarrisonburg, VA 22801 · Harrisonburg City County

Emergency services Birthing friendly

Sentara Martha Jefferson Hospital

Acute Care Hospitals · Charlottesville, VA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number490077

Location500 Martha Jefferson DriveCharlottesville, VA 22911 · Albemarle County

Emergency services Birthing friendly

Shenandoah Memorial Hospital

Critical Access Hospitals · Woodstock, VA

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number491305

Location759 South Main StreetWoodstock, VA 22664 · Shenandoah County

Emergency services

Page Memorial Hospital, Inc

Critical Access Hospitals · Luray, VA

OwnershipVoluntary non-profit - Private

CMS Certification Number491307

Location200 Memorial DriveLuray, VA 22835 · Page County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 22801 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$86.88 typical visit price

range $56.19 – $170.30

Typical copayment $21.72 (range $14.04 – $42.57)

Most-billed visit code 99203

Established Patient

$70.08 typical visit price

range $18.07 – $138.91

Typical copayment $17.52 (range $4.51 – $34.72)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

95.11/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored through an Alternative Payment Model

Quality

86.31

Promoting Interoperability

100

Improvement Activities

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. THOMAS IVAN KRISZTINICZ MD

Orthopaedic Surgery

2509 PLEASANT RUN DR
ROCKINGHAM, VA 22801

Harrisonburg City (540) 689-4500

BENJAMIN PATRICK PERSONS MD

Internal Medicine (Rheumatology)

2509 PLEASANT RUN DR
HARRISONBURG, VA 22801

Harrisonburg City (540) 689-5700

TAYLOR AMANDA ALLEN LAT, ATC

Specialist/Technologist (Athletic Trainer)

2509 PLEASANT RUN DR
HARRISONBURG, VA 22801

Harrisonburg City (540) 689-5500

STEPHEN MICHAEL CROWE ERNST MD

Orthopaedic Surgery

2509 PLEASANT RUN DR
ROCKINGHAM, VA 22801

Harrisonburg City (540) 689-4500

THOMAS S. WEBER M.D.

Family Medicine (Sports Medicine)

2509 PLEASANT RUN DR
HARRISONBURG, VA 22801

Harrisonburg City (540) 689-5500

DR. ERWIN SECRETOV M.D.

Orthopaedic Surgery

2509 PLEASANT RUN DR
ROCKINGHAM, VA 22801

Harrisonburg City (540) 689-5500

THOMAS W COURTNEY MD

Orthopaedic Surgery

2509 PLEASANT RUN DR
HARRISONBURG, VA 22801

Harrisonburg City (540) 689-5500

RMH MEDICAL GROUP LLC

Durable Medical Equipment & Medical Supplies

2509 PLEASANT RUN DR
ROCKINGHAM, VA 22801

Harrisonburg City (540) 689-5500

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mark Williams's NPI number?

The NPI number for Mark Williams is 1821484163. It was assigned to this individual provider in the NPPES registry on April 14, 2015.

Where is Mark Williams located?

Mark Williams practices at 2509 Pleasant Run Dr, Rockingham, VA 22801. The listed phone number is (540) 689-5500.

What is Mark Williams's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.

Is Mark Williams enrolled in Medicare?

Yes. Mark Williams is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Mark Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Williams reassigns Medicare benefits to Rmh Medical Group LLC (Rockingham, VA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Mark Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Mark Williams affiliated with any hospitals?

According to CMS data, Mark Williams is affiliated with Sentara Rmh Medical Center, Sentara Martha Jefferson Hospital, Shenandoah Memorial Hospital and Page Memorial Hospital, Inc.

When was this NPI record last updated?

The NPPES record for Mark Williams was last updated on July 12, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.