Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MARK STANLEY WILLIAMS DO
NPI 1477554624
Orthopaedic Surgery in Bloomsburg, PA

Q: What is Mark Williams's NPI number?

The NPI number for Mark Williams is 1477554624. It was assigned to this individual provider in the NPPES registry on August 9, 2005.

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 October 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 days 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 August 09, 2005PECOS EnrolledAccepts Medicare Assignment

90.45/100

CMS Quality Rating

6850 LOWS RD, BLOOMSBURG, PA 17815(570) 784-7300(570) 784-7331 Get Directions Write a Review

NPPES record last updated: October 16, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Oct 16, 2026, Mar 19, 2021 (2 updates tracked since 2021).

On this page

About Mark Stanley Williams Do NPPES

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

MARK STANLEY WILLIAMS DO (NPI 1477554624) is an individual orthopaedic surgery provider in Bloomsburg, Pennsylvania, licensed in Pennsylvania (05008141L) and active in the NPI registry since August 2005. He is enrolled in Medicare PECOS, is affiliated with Geisinger-bloomsburg Hospital, and is a graduate of Philadelphia College Of Osteopathic Medicine (1992).

NPPES Registry Identity

NPI1477554624

Entity TypeIndividualMale

Primary Taxonomy207X00000X

Provider Legal NameMARK STANLEY WILLIAMSCredential: DO

Location Address6850 LOWS RDBloomsburg, PA 17815-8729

Mailing Address6850 Lows RoadBloomsburg, PA 17815 · (570) 784-7300 · Fax (570) 784-7331

Phone(570) 784-7300

Fax(570) 784-7331

Sole ProprietorNo

Medical School CMSPhiladelphia College Of Osteopathic MedicineGraduated 1992

Enumeration DateAugust 9, 2005

Last NPPES UpdateOctober 16, 20262 updates tracked since enumeration

NPPES CertifiedOctober 16, 2026

✔ NPI 1477554624 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyOrthopaedic SurgeryAllopathic & Osteopathic Physicians

Taxonomy Code207X00000X

License✔ Licensed in PA · 05008141L

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.

Also ListedFamily MedicineTaxonomy 207Q00000X · License OS008141L (PA)

6850 LOWS RD, Bloomsburg, PA 17815

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Other Identifiers 1

Medicaid0016392810001PA

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Buckeye Health Plan, Ambetter Health, Ambetter Health of Delaware.Insurance ›

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

Mark Stanley Williams Do 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 ID3971495342

PECOS Enrollment IDI20040329001372

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.

Susquehanna Valley Medical Specialties, PC

Same address

Orthopaedic Surgery

6850 LOWS RD
Bloomsburg, PA 17815

Reassigned Medicare billing, Pennsylvania enrollment
9 clinicians in this Medicare group

NPI 1386637296 (570) 784-7300

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 19

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.

Injection, betamethasone acetate 3 mg and betamethasone sodium phosphate 3 mg J0702

This injection contains two medications, betamethasone acetate and betamethasone sodium phosphate. It is used to reduce inflammation and pain. It's given by a healthcare professional, often directly into the area causing discomfort.

1,264 services228 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.

271 services194 patients

X-ray of knee, 1-2 views 73560

An X-ray of the knee with 1-2 views is a quick, painless test that produces images of the knee bones. It helps identify fractures, infections, or changes in the knee joint. During the procedure, you'll be asked to stay still while the X-ray machine captures the images.

218 services141 patients

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.

166 services148 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.

95 services95 patients

X-ray of both knees while standing 73565

An X-ray of both knees while standing is a diagnostic procedure that captures images of your knee joints. You'll stand in front of an X-ray machine, and it will take pictures showing the bones and tissues in your knees. This helps doctors identify any abnormalities or injuries.

48 services48 patients

X-ray of shoulder, minimum of 2 views 73030

An X-ray of the shoulder, with a minimum of 2 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of your shoulder bones. This helps in diagnosing conditions like fractures, arthritis, or other abnormalities. The procedure is quick and painless.

41 services35 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.

40 services36 patients

X-ray of pelvis, minimum of 3 views 72190

An X-ray of the pelvis with a minimum of 3 views is a diagnostic procedure that uses radiation to create images of your lower body area. This helps in detecting issues like fractures, arthritis, or other abnormalities. It's quick, non-invasive, and typically painless.

33 services33 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.

29 services29 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.

25 services25 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.

23 services23 patients

Aspiration and/or injection of fluid from medium joint 20605

This procedure involves a needle being inserted into a medium-sized joint, such as a knee or shoulder, to remove (aspirate) excess fluid. Sometimes, medication may also be injected into the joint to reduce inflammation and pain.

21 services18 patients

Incision of tendon covering of finger 26055

This procedure involves making a small cut into the protective sheath around a finger tendon. It's typically done to relieve pressure or inflammation, improve finger movement, or treat conditions like trigger finger. It's a safe, often outpatient procedure.

18 services16 patients

Release and/or relocation of hand nerve 64721

This procedure involves adjusting or moving a nerve in your hand to alleviate discomfort or improve function. The nerve may be compressed, causing pain or numbness. By releasing or relocating the nerve, these symptoms can be reduced, enhancing hand usage.

17 services17 patients

X-ray of lower and sacral spine, minimum of 4 views 72110

An X-ray of the lower and sacral spine involves capturing images of your lower back and tailbone area. It helps in identifying issues like fractures, arthritis, or other abnormalities. At least four different angles or 'views' are taken to get a comprehensive picture.

15 services15 patients

Removal of both knee cartilages using an endoscope 29880

This procedure, also known as bilateral knee arthroscopy, involves using a small camera (endoscope) to view and remove damaged cartilage from both knees. It's a minimally invasive surgery aimed at relieving pain and improving mobility.

14 services14 patients

X-ray of pelvis, 1-2 views 72170

An X-ray of the pelvis, 1-2 views, is a quick and painless imaging test. It uses a small amount of radiation to produce images of the lower part of your torso. These images help to detect any abnormalities or injuries in your hip bones and surrounding structures.

14 services13 patients

Ultrasonic guidance during surgery 76998

Ultrasonic guidance during surgery is a technique that uses sound waves to create real-time images of the inside of your body. This helps the surgeon navigate and perform procedures more accurately, reducing the risk of complications. It's like a GPS for your body's internal structures.

12 services12 patients

Hospital Affiliations CMS Care Compare 2

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

Geisinger-Bloomsburg Hospital

Acute Care Hospitals · Bloomsburg, PA

OwnershipVoluntary non-profit - Private

CMS Certification Number390003

Location549 East Fair StreetBloomsburg, PA 17815 · Columbia County

Emergency services Birthing friendly

Geisinger Medical Center

Acute Care Hospitals · Danville, PA

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number390006

Location100 North Academy AvenueDanville, PA 17822 · Montour County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 17815 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

$84.88 typical visit price

range $54.64 – $166.87

Typical copayment $21.22 (range $13.66 – $41.71)

Most-billed visit code 99203

Established Patient

$68.36 typical visit price

range $17.33 – $135.84

Typical copayment $17.09 (range $4.33 – $33.96)

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.

90.45/100

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

Scored through an Alternative Payment Model

Quality

80.91

Promoting Interoperability

100

Improvement Activities

Referred Medical Equipment & Supplies CMS DME claims 2

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Continuous passive motion exercise device for use on knee only E0935

DME-Other DME · category DE000N

2 suppliers20 claims382 services$21.98 avg. paid by Medicare

Shoulder orthosis, figure of eight design abduction restrainer, canvas and webbing, prefabricated, off-the-shelf L3660

DME-Orthotic Devices · category DF000N

2 suppliers18 claims18 services$78.58 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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.

MICHAEL MARINO DO

Internal Medicine (Sleep Medicine)

6850 LOWS RD
BLOOMSBURG, PA 17815

Columbia County (570) 271-7089

TARA STAUFFER PTA

Physical Therapy Assistant

6850 LOWS RD
BLOOMSBURG, PA 17815

Columbia County (570) 784-7300

MRS. SANDRA J. MCGINLEY M.S., CCC-A

Audiologist

6850 LOWS RD, SUITE 320
BLOOMSBURG, PA 17815

Columbia County (570) 387-4368

DR. CHRIS MANSEL O'NEIL DO

Family Medicine

6850 LOWS RD, STE 325
BLOOMSBURG, PA 17815

Columbia County (570) 784-5545

ELIZABETH ANN FRITZ CRNP

Nurse Practitioner

6850 LOWS RD, STE 325
BLOOMSBURG, PA 17815

Columbia County (570) 784-5545

MISS EMMA N WYLLIE PTA

Physical Therapy Assistant

6850 LOWS RD
BLOOMSBURG, PA 17815

Columbia County (570) 784-6860

ARIEL NICHOLE SANTORE PA-C

Physician Assistant

6850 LOWS RD, STE 325
BLOOMSBURG, PA 17815

Columbia County (570) 784-5545

HANNAH JOAN HARVEY PA-C

Obstetrics & Gynecology

6850 LOWS RD
BLOOMSBURG, PA 17815

Columbia County (570) 416-0437

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 1477554624. It was assigned to this individual provider in the NPPES registry on August 9, 2005.

Where is Mark Williams located?

Mark Williams practices at 6850 Lows Rd, Bloomsburg, PA 17815. The listed phone number is (570) 784-7300.

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 Susquehanna Valley Medical Specialties, PC (Bloomsburg, PA). 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.

What insurance does Mark Williams accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Ambetter from Buckeye Health Plan list Mark Williams as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Mark Williams affiliated with any hospitals?

According to CMS data, Mark Williams is affiliated with Geisinger-Bloomsburg Hospital and Geisinger Medical Center.

When was this NPI record last updated?

The NPPES record for Mark Williams was last updated on October 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 days 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.