1. Home
  2. Directory
  3. Indiana
  4. Terre Haute
  5. Pathology
  6. NPI Profile

WILLIAM PATRICK O'NEILL MD
NPI 1922118900
Pathology - Cytopathology in Terre Haute, IN

Active since August 30, 2006PECOS EnrolledAccepts Medicare Assignment
3901 S 7TH ST, TERRE HAUTE, IN 47802(812) 234-8261(812) 234-8262 Get Directions Write a Review

NPPES record last updated: April 15, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About William Patrick O'neill Md NPPES

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

WILLIAM PATRICK O'NEILL MD (NPI 1922118900) is an individual cytopathology provider in Terre Haute, Indiana, licensed in New Jersey (25MA12983000) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS, is affiliated with Hca Florida Largo Hospital, and is a graduate of Other (1987).

NPPES Registry Identity

NPI1922118900
Entity TypeIndividualMale
Primary Taxonomy207ZC0500X
Provider Legal NameWILLIAM PATRICK O'NEILLCredential: MD
Location Address3901 S 7TH STTerre Haute, IN 47802-5709
Mailing Address2901 Ohio Blvd, Suite 127Terre Haute, IN 47803-2239 · (812) 234-8261 · Fax (812) 234-8262
Phone(812) 234-8261
Fax(812) 234-8262
Sole ProprietorNo
Medical School CMSOtherGraduated 1987
Enumeration DateAugust 30, 2006
Last NPPES UpdateApril 15, 2026
NPPES CertifiedApril 15, 2026
✔ NPI 1922118900 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPathology · CytopathologyAllopathic & Osteopathic Physicians
Taxonomy Code207ZC0500X
License✔ Licensed in NJ · 25MA12983000
Definition
A cytopathologist is an anatomic pathologist trained in the diagnosis of human disease by means of the study of cells obtained from body secretions and fluids, by scraping, washing, or sponging the surface of a lesion, or by the aspiration of a tumor mass or body organ with a fine needle. A major aspect of a cytopathologist's practice is the interpretation of Papanicolaou-stained smears of cells from the female reproductive systems, the Pap test. However, the cytopathologist's expertise is applied to the diagnosis of cells from all systems and areas of the body. He/she is a consultant to all medical specialists.
Also ListedPathology · Anatomic PathologyTaxonomy 207ZP0101X · License 25MA12983000 (NJ), 01061109A (IN)
3901 S 7TH ST, Terre Haute, IN 47802
Open in Google Maps ↗

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

William Patrick O'neill 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 ID2062442155
PECOS Enrollment IDI20050818000289, I20260223001764
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

5

Medicare enrollment records show William O'neill reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Rwjbh Emergency Medicine Associates, LLC
688 mi
Emergency Medicine
3 EXECUTIVE DR, STE 400
Somerset, NJ 08873
  • Reassigned Medicare billing, New Jersey enrollment
  • 1,557 clinicians in this Medicare group
NPI 1912510041 (732) 867-9618
Rutgers Health-Rwj Pediatric Critical Care
691 mi
Anesthesiology
125 PATERSON ST STE 5123
New Brunswick, NJ 08901
  • Reassigned Medicare billing, New Jersey enrollment
  • 492 clinicians in this Medicare group
NPI 1063420776 (732) 235-7246
Rwjbh Observation Associates LLC
700 mi
Emergency Medicine
94 OLD SHORT HILLS RD
Livingston, NJ 07039
  • Reassigned Medicare billing, New Jersey enrollment
  • 1,913 clinicians in this Medicare group
NPI 1760095806 (888) 724-7123
Integrated Regional Laboratories Pathology Services, LLC
979 mi
Anatomic Pathology & Clinical Pathology
5301 S CONGRESS AVE, C/O JFK MEDICAL CENTER LABORATORY
Atlantis, FL 33462
  • Reassigned Medicare billing, Florida enrollment
  • 143 clinicians in this Medicare group
NPI 1942526298 (954) 777-0018
Cascade Pathology Services, Corp
1,834 mi
Anatomic Pathology & Clinical Pathology
2211 NE 139TH ST
Vancouver, WA 98686
  • Reassigned Medicare billing, Washington enrollment
  • 34 clinicians in this Medicare group
NPI 1568618239 (360) 487-1000

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

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.

Pathology examination of tissue using a microscope, intermediate complexity 88305
A pathology examination of tissue with intermediate complexity involves studying a small sample of your body tissue under a microscope. This helps in identifying any abnormal cells or signs of disease. It's a detailed process requiring expert analysis to ensure accurate results.
130 services71 patients
Special stained specimen slides to examine tissue, each additional procedure 88341
Special stained specimen slides are used to analyze tissue in detail. In this process, extra procedures may be needed for a more thorough examination. These involve applying special stains to the tissue on slides, enhancing specific elements for closer study.
42 services12 patients
Cell examination of specimen, selective cellular enhancement technique 88112
Cell examination of a specimen using selective cellular enhancement technique is a lab process that improves the visibility of certain cells in a sample. It helps in identifying abnormalities or diseases. The process is non-invasive, safe, and aids in accurate diagnosis.
34 services30 patients
Special stained specimen slides to examine tissue, initial procedure 88342
This procedure involves the use of specially stained slides to examine tissue samples. The initial process involves obtaining a small tissue sample from your body. This sample is then placed on a slide and stained with special dyes to highlight different structures and elements. The stained slide is then examined under a microscope to help diagnose any potential health issues.
23 services21 patients
Pathology examination of tissue using a microscope, moderately low complexity 88304
A pathology examination of tissue, moderately low complexity, involves studying a small sample of your body tissue under a microscope. It helps to identify any abnormal cells or diseases. It's a routine procedure, not complex, and provides crucial insights for your diagnosis.
16 services16 patients
Preparation of tissue for examination by removing any calcium present 88311
This procedure involves treating tissue samples to remove any calcium, which can interfere with the examination. The tissue is soaked in a special solution that safely dissolves the calcium, leaving the tissue intact for accurate analysis. This helps in making precise diagnoses.
16 services12 patients

Hospital Affiliations CMS Care Compare 4

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

Hca Florida Largo Hospital

Acute Care Hospitals · Largo, FL
2/5 CMS rating
OwnershipProprietary
CMS Certification Number100248
Location201 14th St SWLargo, FL 33770 · Pinellas County
Emergency services

Union Hospital Inc

Acute Care Hospitals · Terre Haute, IN
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number150023
Location1606 N Seventh StTerre Haute, IN 47804 · Vigo County
Emergency services Birthing friendly

Robert Wood Johnson University Hospital At Hamilton

Acute Care Hospitals · Hamilton, NJ
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number310110
LocationOne Hamilton Health PlaceHamilton, NJ 08690 · Mercer County
Emergency services

Tacoma General Allenmore Hospital

Acute Care Hospitals · Tacoma, WA
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number500129
Location315 S Mlk Jr WayTacoma, WA 98405 · Pierce County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 47802 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
$122.49 typical visit price
range $53.07 – $161.76
Typical copayment $30.62 (range $13.26 – $40.44)
Most-billed visit code 99204
Established Patient
$94.22 typical visit price
range $16.93 – $132.22
Typical copayment $23.55 (range $4.23 – $33.05)
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.

GLOBALMED LAB AND FORENSICS PROFESSIONAL CORPORATION
Pathology (Anatomic Pathology)
3901 S 7TH ST
TERRE HAUTE, IN 47802
Vigo County (812) 232-0021
ROBERT LUCAS GOMEZ CRNA
Nurse Anesthetist, Certified Registered
3901 S 7TH ST
TERRE HAUTE, IN 47802
Vigo County (812) 237-0211
DOBBS PARK INPATIENT SERVICES LLC
Hospitalist
3901 S 7TH ST
TERRE HAUTE, IN 47802
Vigo County (469) 401-2386
CHARLES G ABELL PHARMD
Pharmacist
3901 S 7TH ST
TERRE HAUTE, IN 47802
Vigo County (812) 237-1640
REBECCA MAUPIN CRNA
Nurse Anesthetist, Certified Registered
3901 S 7TH ST
TERRE HAUTE, IN 47802
Vigo County (812) 232-0021
TERRE HAUTE REGIONAL HOSPITAL, L.P.
General Acute Care Hospital
3901 S 7TH ST
TERRE HAUTE, IN 47802
Vigo County (812) 232-0021
LUCIDUS DIAGNOSTICS LLC
Pathology (Anatomic Pathology & Clinical Pathology)
3901 S 7TH ST
TERRE HAUTE, IN 47802
Vigo County (812) 232-0021
IN-I MEDICAL SERVICES PC
Emergency Medicine
3901 S 7TH ST
TERRE HAUTE, IN 47802
Vigo County (469) 401-2386

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 O'neill's NPI number?

The NPI number for William O'neill is 1922118900. It was assigned to this individual provider in the NPPES registry on August 30, 2006.

Where is William O'neill located?

William O'neill practices at 3901 S 7th St, Terre Haute, IN 47802. The listed phone number is (812) 234-8261.

What is William O'neill's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Cytopathology, with taxonomy code 207ZC0500X.

Is William O'neill enrolled in Medicare?

Yes. William O'neill 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.

Which organizations bill Medicare for William O'neill's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William O'neill reassigns Medicare benefits to 5 organizations: Rwjbh Emergency Medicine Associates, LLC (Somerset, NJ), Rutgers Health-Rwj Pediatric Critical Care (New Brunswick, NJ), Rwjbh Observation Associates LLC (Livingston, NJ), Integrated Regional Laboratories Pathology Services, LLC (Atlantis, FL) and Cascade Pathology Services, Corp (Vancouver, WA). 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 O'neill's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is William O'neill affiliated with any hospitals?

According to CMS data, William O'neill is affiliated with Hca Florida Largo Hospital, Union Hospital Inc, Robert Wood Johnson University Hospital At Hamilton and Tacoma General Allenmore Hospital.

When was this NPI record last updated?

The NPPES record for William O'neill was last updated on April 15, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.