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MARK S WILLIAMS D.O.
NPI 1215920186
Family Medicine in Scottdale, PA

Active since August 25, 2005PECOS EnrolledAccepts Medicare AssignmentCLIA 39D0181323 · Waiver
305 EVERSON AVE, SCOTTDALE, PA 15683(724) 887-4550(724) 887-7485 Get Directions Write a Review

NPPES record last updated: February 12, 2008. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Mark S Williams D.o. NPPES

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

MARK S WILLIAMS D.O. (NPI 1215920186) is an individual family medicine provider in Scottdale, Pennsylvania, licensed in Pennsylvania (OS005170L) and active in the NPI registry since August 2005. He is enrolled in Medicare PECOS, holds a CLIA Waiver certificate valid through August 31, 2026, and is affiliated with Uniontown Hospital.

NPPES Registry Identity

NPI1215920186
Entity TypeIndividualMale
Primary Taxonomy207Q00000X
Provider Legal NameMARK S WILLIAMSCredential: D.O.
Location Address305 EVERSON AVEScottdale, PA 15683-1512
Mailing Address305 Everson AveScottdale, PA 15683-1512 · (724) 887-4550 · Fax (724) 887-7485
Phone(724) 887-4550
Fax(724) 887-7485
Sole ProprietorYes
Medical School CMSPhiladelphia College Of Osteopathic MedicineGraduated 1982
Enumeration DateAugust 25, 2005
Last NPPES UpdateFebruary 12, 2008
✔ NPI 1215920186 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in PA · OS005170L
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
305 EVERSON AVE, Scottdale, PA 15683
Open in Google Maps ↗

Other Identifiers 3

Medicaid0009761700002PA
Medicare ID-Type Unspecified148309PA
Medicare UPINC31882PA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mark S 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 ID8527072248
PECOS Enrollment IDI20101014000862
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.

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 39D0181323

Mark S Williams Do · Scottdale, PA
Active · expires Aug 31, 2026
CLIA Number39D0181323
Laboratory TypePhysician Office
Certificate Effective DateSeptember 1, 2024
Certificate Expiration DateAugust 31, 2026
Laboratory DirectorMark S. Williams Do
Laboratory Phone(724) 887-4550
Laboratory LocationMark S Williams Do305 Everson Ave, Scottdale, PA 15683
CLIA data matches this NPI record on: Address Phone
This certificate is issued to a laboratory to perform only waived tests.

Areas of Expertise CMS Part B claims 7

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.
412 services213 patients
Administration of influenza virus vaccine G0008
The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.
134 services130 patients
Influenza vaccine split virus, preservative free 90662
The Influenza Vaccine Split Virus, preservative-free, is a flu shot to protect against the influenza virus. It is made from parts of inactivated flu viruses and doesn't contain preservatives, reducing potential side effects. It helps your body develop immunity to the flu.
119 services118 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
94 services94 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.
78 services68 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.
52 services43 patients

Hospital Affiliations CMS Care Compare 5

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

Uniontown Hospital

Acute Care Hospitals · Uniontown, PA
1/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number390041
Location500 West Berkeley StreetUniontown, PA 15401 · Fayette County
Emergency services

Excela Health Westmoreland Regional Hospital

Acute Care Hospitals · Greensburg, PA
3/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number390145
Location532 West Pittsburgh StreetGreensburg, PA 15601 · Westmoreland County
Emergency services Birthing friendly

Penn Highlands Connellsville

Acute Care Hospitals · Connellsville, PA
OwnershipVoluntary non-profit - Private
CMS Certification Number390184
Location401 East Murphy AvenueConnellsville, PA 15425 · Fayette County
Emergency services

Excela Health - Frick Hospital

Acute Care Hospitals · Mount Pleasant, PA
OwnershipVoluntary non-profit - Other
CMS Certification Number390217
Location508 South Church StreetMount Pleasant, PA 15666 · Westmoreland County
Emergency services

Excela Health Latrobe Hospital

Acute Care Hospitals · Latrobe, PA
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number390219
LocationOne Mellon WayLatrobe, PA 15650 · Westmoreland County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 15683 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
$96.82 typical visit price
range $17.33 – $135.84
Typical copayment $24.20 (range $4.33 – $33.96)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 3

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

Portable liquid oxygen system, rental; includes portable container, supply reservoir, humidifier, flowmeter, refill adaptor, contents gauge, cannula or mask, and tubing E0434
DME-Oxygen and Supplies · category DC000N
1 supplier12 claims12 services$31.76 avg. paid by Medicare
Stationary liquid oxygen system, rental; includes container, contents, regulator, flowmeter, humidifier, nebulizer, cannula or mask, & tubing E0439
DME-Oxygen and Supplies · category DC000N
1 supplier12 claims12 services$67.88 avg. paid by Medicare
Supply allowance for therapeutic continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service K0553
DME-Other DME · category DE017N
2 suppliers31 claims31 services$190.18 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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 1215920186. It was assigned to this individual provider in the NPPES registry on August 25, 2005.

Where is Mark Williams located?

Mark Williams practices at 305 Everson Ave, Scottdale, PA 15683. The listed phone number is (724) 887-4550.

What is Mark Williams's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

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.

Does Mark Williams hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 39D0181323) is associated with this NPI, valid through August 31, 2026. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

Is Mark Williams affiliated with any hospitals?

According to CMS data, Mark Williams is affiliated with Uniontown Hospital, Excela Health Westmoreland Regional Hospital, Penn Highlands Connellsville, Excela Health - Frick Hospital and Excela Health Latrobe Hospital.

When was this NPI record last updated?

The NPPES record for Mark Williams was last updated on February 12, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.