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DR. WILLIAM S. CLARK DO
NPI 1770690430
Emergency Medicine in Escalon, CA

Active since August 25, 2006PECOS EnrolledAccepts Medicare Assignment
94.62/100
CMS Quality Rating
1631 4TH ST, ESCALON, CA 95320(209) 838-3434 Get Directions Write a Review

NPPES record last updated: May 12, 2022. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: May 12, 2022, Mar 17, 2018, Jul 12, 2017 and 1 more (4 updates tracked since 2016).

About Dr. William S. Clark Do NPPES

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

DR. WILLIAM S. CLARK DO (NPI 1770690430) is an individual emergency medicine provider in Escalon, California, licensed in California (20A8748) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Modesto, and is a graduate of Chicago College Of Osteopathy (2000).

NPPES Registry Identity

NPI1770690430
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameDR. WILLIAM S. CLARKCredential: DO
Location Address1631 4TH STEscalon, CA 95320-2007
Mailing Address1235 Mchenry AveModesto, CA 95350-5370 · (818) 398-8527 · Fax (209) 254-7900
Phone(209) 838-3434
Sole ProprietorNo
Medical School CMSChicago College Of OsteopathyGraduated 2000
Enumeration DateAugust 25, 2006
Last NPPES UpdateMay 12, 20224 updates tracked since enumeration
NPPES CertifiedMay 12, 2022
✔ NPI 1770690430 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
Licenses✔ Licensed in CA · 20A8748✔ Licensed in IN · 02002521A
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.
Also ListedCounselor · Addiction (Substance Use Disorder)Taxonomy 101YA0400X · License 20A8748 (CA)
Also ListedGeneral PracticeTaxonomy 208D00000X · License 20A8748 (CA)
1631 4TH ST, Escalon, CA 95320
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Secondary Practice Location 1

Location 11235 McHenry AveModesto, CA 95350-5370 · Phone (818) 398-8527 · Fax (209) 254-7900

Other Identifiers 1

Medicaid00AX87480CA

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. William S. Clark 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 ID4981593464
PECOS Enrollment IDI20041001000742
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 6

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.

Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
437 services376 patients
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.
336 services285 patients
Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
143 services123 patients
Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
77 services70 patients
X-ray of chest, 1 view 71045
A chest X-ray, 1 view, is a quick, painless test that produces images of the structures within your chest, such as your heart, lungs, and blood vessels. It helps in diagnosing conditions like pneumonia, heart problems, or lung cancer. You'll stand in front of a machine that emits X-rays, which pass through your body to create the image.
26 services26 patients
Insertion of non-tunneled central venous tube for infusion (5 years or older) 36556
This procedure involves placing a thin tube into a large vein, usually in the neck or chest, to administer medication or fluids. It's done under local anesthesia to minimize discomfort. It's a standard, safe procedure for individuals aged 5 and above.
11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95320 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
$90.32 typical visit price
range $58.87 – $176.60
Typical copayment $22.58 (range $14.71 – $44.15)
Most-billed visit code 99203
Established Patient
$103.36 typical visit price
range $19.28 – $144.60
Typical copayment $25.84 (range $4.82 – $36.15)
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.

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.

94.62/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality76.67
Improvement Activities40
Cost97.14

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 William Clark's NPI number?

The NPI number for William Clark is 1770690430. It was assigned to this individual provider in the NPPES registry on August 25, 2006.

Where is William Clark located?

William Clark practices at 1631 4th St, Escalon, CA 95320. The listed phone number is (209) 838-3434.

What is William Clark's specialty?

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

Is William Clark enrolled in Medicare?

Yes. William Clark 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.

When was this NPI record last updated?

The NPPES record for William Clark was last updated on May 12, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.