DR. CLARK L WILLIAMS MD
NPI 1710911417
Emergency Medicine in Lancaster, WI

Active since July 10, 2006PECOS EnrolledAccepts Medicare Assignment
507 S MONROE ST, LANCASTER, WI 53813(608) 723-2143 Get Directions Write a Review

NPPES record last updated: September 3, 2024. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Sep 3, 2024, Jan 25, 2023, Jul 12, 2019 (3 updates tracked since 2019).

About Dr. Clark L Williams Md NPPES

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

DR. CLARK L WILLIAMS MD (NPI 1710911417) is an individual emergency medicine provider in Lancaster, Wisconsin, licensed in Wisconsin (42618) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with Finley Hospital, and is a graduate of University Of Wisconsin School Of Medicine (1999).

NPPES Registry Identity

NPI1710911417
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameDR. CLARK L WILLIAMSCredential: MD
Location Address507 S MONROE STLancaster, WI 53813-2054
Mailing Address507 S Monroe StLancaster, WI 53813-2054 · (608) 723-2143
Sole ProprietorNo
Medical School CMSUniversity Of Wisconsin School Of MedicineGraduated 1999
Enumeration DateJuly 10, 2006
Last NPPES UpdateSeptember 3, 20243 updates tracked since enumeration
NPPES CertifiedSeptember 3, 2024
NPI 1710911417 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
Licenses Licensed in WI · 42618 Licensed in IA · 37010
Definition

An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.

507 S MONROE ST, Lancaster, WI 53813

Accepted Insurance

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

Dr. Clark L Williams Md 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 ID749173151
PECOS Enrollment IDI20070521000078
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.

Areas of Expertise CMS Part B claims

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.

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010
A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.
12 services11 patients

Hospital Affiliations CMS Care Compare 3

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

Finley Hospital

Acute Care Hospitals · Dubuque, IA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number160117
Location350 North Grandview AvenueDubuque, IA 52001 · Dubuque County
Emergency services Birthing friendly

Mercyone Elkader Medical Center

Critical Access Hospitals · Elkader, IA
OwnershipVoluntary non-profit - Private
CMS Certification Number161319
Location901 Davidson Street NWElkader, IA 52043 · Clayton County
Emergency services

Grant Regional Health Center

Critical Access Hospitals · Lancaster, WI
OwnershipVoluntary non-profit - Private
CMS Certification Number521322
Location507 S Monroe StLancaster, WI 53813 · Grant County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 53813 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
$82.92 typical visit price
range $53.90 – $163.24
Typical copayment $20.73 (range $13.47 – $40.81)
Most-billed visit code 99203
Established Patient
$95.41 typical visit price
range $17.40 – $133.76
Typical copayment $23.85 (range $4.35 – $33.44)
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.

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.

Dietitian, Registered
507 S MONROE ST
LANCASTER, WI 53813
Nurse Practitioner (Family)
507 S MONROE ST
LANCASTER, WI 53813
Obstetrics & Gynecology (Reproductive Endocrinology)
507 S MONROE ST
LANCASTER, WI 53813
Nurse Anesthetist, Certified Registered
507 S MONROE ST
LANCASTER, WI 53813
Physical Therapist
507 S MONROE ST
LANCASTER, WI 53813
Physical Therapist
507 S MONROE ST
LANCASTER, WI 53813
Non-Pharmacy Dispensing Site
507 S MONROE ST
LANCASTER, WI 53813
Surgery
507 S MONROE ST
LANCASTER, WI 53813

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 Clark Williams's NPI number?

The NPI number for Clark Williams is 1710911417. It was assigned to this individual provider in the NPPES registry on July 10, 2006.

Where is Clark Williams located?

Clark Williams practices at 507 S Monroe St, Lancaster, WI 53813. The listed phone number is (608) 723-2143.

What is Clark Williams's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Clark Williams enrolled in Medicare?

Yes. Clark 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.

What insurance does Clark Williams accept?

Health plans from Group Health Cooperative-SCW and Medica list Clark 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 Clark Williams affiliated with any hospitals?

According to CMS data, Clark Williams is affiliated with Finley Hospital, Mercyone Elkader Medical Center and Grant Regional Health Center.

When was this NPI record last updated?

The NPPES record for Clark Williams was last updated on September 3, 2024. NPI Profile syncs with the weekly NPPES data releases published by CMS.