WILLIAM LARSEN
NPI 1356711584
Physician Assistant - Medical in Elk Grove Village, IL

Q: What is William Larsen's NPI number?

The NPI number for William Larsen is 1356711584. It was assigned to this individual provider in the NPPES registry on September 30, 2015.

Q: What is William Larsen's specialty?

The primary specialty registered for this NPI is Physician Assistant, specializing in Medical, with taxonomy code 363AM0700X.

Q: When was this NPI record last updated?

The NPPES record for William Larsen was last updated on September 27, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 22 months 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 September 30, 2015PECOS EnrolledAccepts Medicare Assignment

800 BIESTERFIELD RD, ELK GROVE VILLAGE, IL 60007(847) 437-5500 Get Directions Write a Review

NPPES record last updated: September 27, 2024. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Sep 27, 2024, Oct 18, 2021, Mar 17, 2018 and 1 more (4 updates tracked since 2015).

On this page

About William Larsen NPPES

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

WILLIAM LARSEN (NPI 1356711584) is an individual medical provider in Elk Grove Village, Illinois, licensed in Illinois (085005642) and active in the NPI registry since September 2015. He is enrolled in Medicare PECOS, is affiliated with The University Of Chicago Medical Center, and maintains a secondary practice location in Chicago.

NPPES Registry Identity

NPI1356711584

Entity TypeIndividualMale

Primary Taxonomy363AM0700X

Provider Legal NameWILLIAM LARSEN

Location Address800 BIESTERFIELD RDElk Grove Village, IL 60007-3361

Mailing Address800 Biesterfield RdElk Grove Village, IL 60007-3361 · (847) 437-5500

Phone(847) 437-5500

Sole ProprietorNo

Medical School CMSOtherGraduated 2015

Enumeration DateSeptember 30, 2015

Last NPPES UpdateSeptember 27, 20244 updates tracked since enumeration

NPPES CertifiedSeptember 27, 2024

✔ NPI 1356711584 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician Assistant · MedicalPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363AM0700X

License✔ Licensed in IL · 085005642

800 BIESTERFIELD RD, Elk Grove Village, IL 60007

Open in Google Maps ↗

Secondary Practice Location 1

Location 15841 S Maryland AveChicago, IL 60637-1443 · Phone (773) 702-1000

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

William Larsen 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 ID9537469846

PECOS Enrollment IDI20151118000758

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 3

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

100 services63 patients

Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes 99221

Initial hospital inpatient care refers to the first day of your stay in the hospital. This service typically includes a 30-minute check-up with a healthcare professional. They'll assess your health, discuss your condition, and plan your treatment. It's part of ensuring you receive the best possible care.

18 services18 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

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.

The University Of Chicago Medical Center

Acute Care Hospitals · Chicago, IL

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140088

Location5841 South MarylandChicago, IL 60637 · Cook County

Emergency services Birthing friendly

Presence Mercy Medical Center

Acute Care Hospitals · Aurora, IL

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140174

Location1325 N Highland AvenueAurora, IL 60506 · Kane County

Emergency services Birthing friendly

Alexian Brothers Medical Center 1

Acute Care Hospitals · Elk Grove Village, IL

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140258

Location800 Biesterfield RdElk Grove Village, IL 60007 · Cook County

Emergency services Birthing friendly

St Alexius Medical Center

Acute Care Hospitals · Hoffman Estates, IL

4/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number140290

Location1555 N Barrington RdHoffman Estates, IL 60169 · Cook County

Emergency services Birthing friendly

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.

NATIONAL PAIN CENTERS, LLC

Non-Pharmacy Dispensing Site

800 BIESTERFIELD RD, SUITE 302
ELK GROVE VILLAGE, IL 60007

Cook County (847) 701-3250

ALLISON CLAIRE VAN STAALDUINEN

Physician Assistant

800 BIESTERFIELD RD
ELK GROVE VILLAGE, IL 60007

Cook County (224) 273-3152

GRABOWSKI SURGICAL ASSOCIATES SC

Surgery

800 BIESTERFIELD RD, SUITE 3004
ELK GROVE VILLAGE, IL 60007

Cook County (847) 439-7515

NORTHWEST SUBURBAN UROLOGY ASSOCIATES SC

Urology

800 BIESTERFIELD RD, SUITE 303
ELK GROVE VILLAGE, IL 60007

Cook County (847) 593-0404

JAMIE ELIZABETH BASTEN FNP-BC

Nurse Practitioner (Family)

800 BIESTERFIELD RD
ELK GROVE VILLAGE, IL 60007

Cook County (224) 299-4222

HEALTH & WELLNESS P C

Internal Medicine

800 BIESTERFIELD RD, SUITE 2007
ELK GROVE VILLAGE, IL 60007

Cook County (847) 593-2007

DR. BHUPINDER K CHHABRA M.D.

Internal Medicine (Geriatric Medicine)

800 BIESTERFIELD RD, SUITE 3007
ELK GROVE VILLAGE, IL 60007

Cook County (847) 290-6513

BASSEM GHALY M.D.

Anesthesiology

800 BIESTERFIELD RD, DEPARTMENT OF ANESTHESIA, ABMC
ELK GROVE VILLAGE, IL 60007

Cook County (847) 981-3597

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 Larsen's NPI number?

The NPI number for William Larsen is 1356711584. It was assigned to this individual provider in the NPPES registry on September 30, 2015.

Where is William Larsen located?

William Larsen practices at 800 Biesterfield Rd, Elk Grove Village, IL 60007. The listed phone number is (847) 437-5500.

What is William Larsen's specialty?

The primary specialty registered for this NPI is Physician Assistant, specializing in Medical, with taxonomy code 363AM0700X.

Is William Larsen enrolled in Medicare?

Yes. William Larsen 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.

Is William Larsen affiliated with any hospitals?

According to CMS data, William Larsen is affiliated with The University Of Chicago Medical Center, Presence Mercy Medical Center, Alexian Brothers Medical Center 1 and St Alexius Medical Center.

When was this NPI record last updated?

The NPPES record for William Larsen was last updated on September 27, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 22 months 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.