Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

BRETTA K. WARREN M.D.
NPI 1932101938
Pathology - Anatomic Pathology & Clinical Pathology in Arlington Heights, IL

Q: What is Bretta Warren's NPI number?

The NPI number for Bretta Warren is 1932101938. It was assigned to this individual provider in the NPPES registry on August 10, 2005.

Q: What is Bretta Warren's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Anatomic Pathology & Clinical Pathology, with taxonomy code 207ZP0102X.

Q: When was this NPI record last updated?

The NPPES record for Bretta Warren was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 39 days 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 August 10, 2005PECOS EnrolledAccepts Medicare Assignment

90/100

CMS Quality Rating

800 W CENTRAL RD, ARLINGTON HEIGHTS, IL 60005(847) 618-6150(847) 618-6159 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

On this page

About Bretta K. Warren M.d. NPPES

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

BRETTA K. WARREN M.D. (NPI 1932101938) is an individual anatomic pathology & clinical pathology provider in Arlington Heights, Illinois and active in the NPI registry since August 2005. She is enrolled in Medicare PECOS, is affiliated with The University Of Chicago Medical Center, and is a graduate of University Of Chicago, Pritzker School Of Medicine (1996).

NPPES Registry Identity

NPI1932101938

Entity TypeIndividualFemale

Primary Taxonomy207ZP0102X

Provider Legal NameBRETTA K. WARRENCredential: M.D.

Location Address800 W CENTRAL RDArlington Heights, IL 60005-2349

Mailing Address520 E 22nd StLombard, IL 60148-6110 · (630) 874-2542 · Fax (630) 874-2642

Phone(847) 618-6150

Fax(847) 618-6159

Sole ProprietorNo

Medical School CMSUniversity Of Chicago, Pritzker School Of MedicineGraduated 1996

Enumeration DateAugust 10, 2005

Last NPPES UpdateJuly 13, 2026

✔ NPI 1932101938 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPathology · Anatomic Pathology & Clinical PathologyAllopathic & Osteopathic Physicians

Taxonomy Code207ZP0102X

Definition

A pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses information gathered from the microscopic examination of tissue specimens, cells and body fluids, and from clinical laboratory tests on body fluids and secretions for the diagnosis, exclusion and monitoring of disease.

800 W CENTRAL RD, Arlington Heights, IL 60005

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Home State Health, Ambetter Health, Ambetter Health of Delaware.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

Bretta K. Warren M.d. 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 ID5395794028

PECOS Enrollment IDI20050119000980

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 24

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.

1,979 services874 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.

526 services119 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.

223 services185 patients

Protein measurement, serum 84165

A serum protein measurement is a blood test that determines the levels of proteins in your blood. It is used to evaluate your overall health, and diagnose nutritional problems, kidney disease, liver disease, or immune disorders.

150 services139 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.

150 services140 patients

Pathology examination of tissue using a microscope, moderately high complexity 88307

A pathology examination of tissue with moderate complexity involves a detailed study of a small tissue sample from your body. Using a microscope, experts analyze the tissue's structure and cells to identify any abnormalities. This helps in diagnosing various health conditions accurately.

149 services93 patients

Immunologic analysis technique on serum (immunofixation) 86334

Immunofixation is a lab test that helps identify proteins called immunoglobulins in your blood serum. These proteins are part of your immune system. Changes in their levels can indicate certain diseases. The test is simple and only requires a blood sample.

109 services104 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.

101 services86 patients

Microscopic genetic analysis of tumor, manual 88360

Microscopic genetic analysis of a tumor involves examining your tumor's genes under a microscope. This helps identify specific genetic changes in the tumor cells. This information can aid in diagnosing, predicting disease progression, and determining the most effective treatment options.

90 services44 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.

79 services76 patients

Pathology examination of specimen during surgery, first tissue block 88331

A pathology examination during surgery involves the immediate analysis of a removed tissue sample. This helps the surgeon make decisions during your operation. The "first tissue block" refers to the initial sample examined. It's a vital step to ensure your health.

76 services40 patients

Evaluation of fine needle aspirate with interpretation and report 88173

This procedure involves using a thin needle to collect a small sample from an abnormal area or lump. The sample is then examined under a microscope to identify any potential issues. A report of the findings is provided for further analysis.

54 services37 patients

Pathology examination of tissue using a microscope, limited examination 88300

A pathology examination of tissue using a microscope is a procedure where a small sample of your tissue is observed under a microscope. This limited examination helps identify any abnormal cells or signs of disease, aiding in accurate diagnosis and treatment planning.

52 services49 patients

Special stained specimen slides to examine tissue including interpretation and report 88313

Special stained specimen slides are used to examine tissue samples. This involves applying special dyes to the tissue, which helps to highlight certain features under a microscope. The findings are then interpreted and a report is provided. This can aid in diagnosing various health conditions.

41 services16 patients

Examination of archival tissue for genetic analysis 88363

Examination of archival tissue for genetic analysis involves studying previously collected tissue samples. This process helps detect any genetic alterations that may be linked to certain diseases. It's a crucial step in understanding your health and planning appropriate treatments.

33 services33 patients

Pathology examination of tissue using a microscope, high complexity 88309

A high complexity pathology examination involves studying body tissue under a microscope to identify any abnormalities. This intricate process helps in diagnosing various conditions and deciding on the best treatment plan.

27 services22 patients

Evaluation of fine needle aspirate 88172

Evaluation of fine needle aspirate is a diagnostic procedure where a thin needle is used to collect cells from a lump or mass. This sample is then examined under a microscope to determine the nature of the lump, whether it's benign (non-cancerous) or malignant (cancerous).

23 services18 patients

Pathology cytologic examination of specimen during surgery, initial site 88333

A pathology cytologic examination during surgery involves taking a small sample of cells from the initial site of concern. This sample is then examined under a microscope by a pathologist to check for any abnormal or disease-causing cells. This helps guide the ongoing surgical procedure.

21 services21 patients

Surgical pathology, gross and microscopic examinations, for prostate needle biopsy, any method G0416

This procedure involves taking a small tissue sample from your gland located beneath your bladder. The sample is then examined under a microscope by a pathologist to check for any abnormalities or diseases. This is a standard method to ensure your well-being.

21 services21 patients

Special stained specimen slides to identify organisms including interpretation and report 88312

This service involves coloring specimen slides in a special way to help identify organisms. The colors make different parts of the organism stand out. Afterward, a detailed interpretation and report on the findings are provided.

20 services16 patients

Immunologic analysis technique on body fluid, other fluids with concentration 86335

Immunologic analysis is a diagnostic method that assesses your body fluids to detect health issues. It involves concentrating these fluids to enhance detection of specific proteins or cells. It helps identify immune system responses, aiding in accurate diagnosis and treatment.

16 services16 patients

Screening cytopathology, cervical or vaginal (any reporting system), collected in preservative fluid, automated thin layer preparation, requiring interpretation by physician G0124

This is a routine health check where a sample of cells is collected from the lower region of the female reproductive system. The sample is preserved and prepared using automated technology for detailed examination. A doctor interprets the results to check for any abnormalities.

16 services16 patients

Protein measurement, body fluid 84166

A protein measurement of body fluid is a test that gauges the amount of proteins in your fluids. This analysis helps in detecting various health conditions. It's done via a simple sample collection process, usually from blood or urine, in a safe and painless manner.

13 services13 patients

Pathology examination of tissue using a microscope 88302

A pathology examination of tissue involves studying a small sample of your body's cells under a microscope. This helps identify any abnormalities or diseases, such as cancer. The process is crucial for accurate diagnosis and treatment planning.

11 services11 patients

Hospital Affiliations CMS Care Compare 2

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

Northwest Community Hospital 1

Acute Care Hospitals · Arlington Heights, IL

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140252

Location800 W Central RoadArlington Heights, IL 60005 · Cook County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60005 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.

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.

90/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

Improvement Activities

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.

DR. ASAD S MEHDI M.D.

Hospitalist