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WILLIAM CRUIKSHANK M.D.
NPI 1639104052
Internal Medicine in Oak Lawn, IL

Active since July 12, 2006PECOS Enrolled
6101 W 95TH ST, OAK LAWN, IL 60453(708) 261-0831 Get Directions Write a Review

NPPES record last updated: July 30, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jul 30, 2021, Jul 13, 2021 (2 updates tracked since 2021).

About William Cruikshank M.d. NPPES

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

WILLIAM CRUIKSHANK M.D. (NPI 1639104052) is an individual internal medicine provider in Oak Lawn, Illinois, licensed in Illinois (036-081634) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1639104052
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameWILLIAM CRUIKSHANKCredential: M.D.
Location Address6101 W 95TH STOak Lawn, IL 60453-2735
Mailing Address1395 Nw 167th StMiami Gardens, FL 33169-5710 · (773) 768-7700
Phone(708) 261-0831
Sole ProprietorNo
Enumeration DateJuly 12, 2006
Last NPPES UpdateJuly 30, 20212 updates tracked since enumeration
NPPES CertifiedJuly 30, 2021
✔ NPI 1639104052 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in IL · 036-081634
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
6101 W 95TH ST, Oak Lawn, IL 60453
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Secondary Practice Locations 2

Location 1100 W 162nd StSouth Holland, IL 60473-2003 · Phone (708) 730-2200
Location 22231 E 95th StChicago, IL 60617-4804 · Phone (773) 768-7700

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

William Cruikshank M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Reassignments

2

Medicare enrollment records show William Cruikshank reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Advocate Health And Hospitals Corporation
1.8 mi
Mental Health (Including Community Mental Health Center)
4700 W 95TH ST, SUITE LOWER LEVEL 5
Oak Lawn, IL 60453
  • Reassigned Medicare billing, Illinois enrollment
  • 4,870 clinicians in this Medicare group
NPI 1174747075 (800) 216-1110
Pmr Illinois Holding, LLC
1,171 mi
Specialist
1395 NW 167TH ST
Miami Gardens, FL 33169
  • Reassigned Medicare billing, Illinois enrollment
  • 75 clinicians in this Medicare group
NPI 1770038671 (305) 831-4760

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60453 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
$138.86 typical visit price
range $60.08 – $183.39
Typical copayment $34.71 (range $15.02 – $45.84)
Most-billed visit code 99204
Established Patient
$105.70 typical visit price
range $18.97 – $148.12
Typical copayment $26.42 (range $4.74 – $37.03)
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 14

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. ALARMELU SAMBANDAM D.O.
Internal Medicine (Cardiovascular Disease)
6101 W 95TH ST
OAK LAWN, IL 60453
Cook County (708) 261-0831
CRISTINA ELENA MARTI AMARISTA MD
Family Medicine
6101 W 95TH ST
OAK LAWN, IL 60453
Cook County (708) 261-0831
THOMAS JOSEPH MD
Internal Medicine
6101 W 95TH ST
OAK LAWN, IL 60453
Cook County (708) 261-0831
DR. JAROM DASZKO M.D.
Family Medicine
6101 W 95TH ST
OAK LAWN, IL 60453
Cook County (708) 261-0831
MUHAMMAD AHMED MD
Family Medicine
6101 W 95TH ST
OAK LAWN, IL 60453
Cook County (708) 261-0831
HINA IQBAL MD
Internal Medicine
6101 W 95TH ST
OAK LAWN, IL 60453
Cook County (708) 261-0831
DR. SAMIRA HANIF GHANIWALA
Family Medicine
6101 W 95TH ST
OAK LAWN, IL 60453
Cook County (708) 261-0831
JENCARE NEIGHBORHOOD MEDICAL CENTER OAK LAWN, LLC
Specialist
6101 W 95TH ST
OAK LAWN, IL 60453
Cook County (305) 628-6117

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 Cruikshank's NPI number?

The NPI number for William Cruikshank is 1639104052. It was assigned to this individual provider in the NPPES registry on July 12, 2006.

Where is William Cruikshank located?

William Cruikshank practices at 6101 W 95th St, Oak Lawn, IL 60453. The listed phone number is (708) 261-0831.

What is William Cruikshank's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is William Cruikshank enrolled in Medicare?

Yes. William Cruikshank is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for William Cruikshank's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Cruikshank reassigns Medicare benefits to 2 organizations: Advocate Health And Hospitals Corporation (Oak Lawn, IL) and Pmr Illinois Holding, LLC (Miami Gardens, FL). Each 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 William Cruikshank's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for William Cruikshank was last updated on July 30, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.