DR. KATHLEEN BYRNES MD
NPI 1417399676
Pathology - Anatomic Pathology & Clinical Pathology in Saint Louis, MO

Active since July 29, 2013PECOS EnrolledAccepts Medicare Assignment
79.29/100
CMS Quality Rating
425 S EUCLID AVE, DIV PA, ANATOMIC AND MOLECULAR PATHOLOGY, SAINT LOUIS, MO 63110(314) 362-5641(314) 362-0369 Get Directions Write a Review

NPPES record last updated: April 15, 2025. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Apr 25, 2024, Apr 10, 2024, Nov 15, 2021 and 3 more (6 updates tracked since 2017).

About Dr. Kathleen Byrnes Md NPPES

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

DR. KATHLEEN BYRNES MD (NPI 1417399676) is an individual anatomic pathology & clinical pathology provider in Saint Louis, Missouri, licensed in Missouri (2017008742) and active in the NPI registry since July 2013. She is enrolled in Medicare PECOS, is affiliated with Memorial Hospital, and is a graduate of Tulane University School Of Medicine (2013).

NPPES Registry Identity

NPI1417399676
Entity TypeIndividualFemale
Primary Taxonomy207ZP0102X
Provider Legal NameDR. KATHLEEN BYRNESCredential: MD
Location Address425 S EUCLID AVE, DIV PA, ANATOMIC AND MOLECULAR PATHOLOGYSaint Louis, MO 63110-1005
Mailing AddressPo Box 7412011Chicago, IL 60674-2011 · (314) 362-5641 · Fax (314) 362-0369
Fax(314) 362-0369
Sole ProprietorNo
Medical School CMSTulane University School Of MedicineGraduated 2013
Enumeration DateJuly 29, 2013
Last NPPES UpdateApril 15, 20256 updates tracked since enumeration
NPI 1417399676 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyPathology · Anatomic Pathology & Clinical PathologyAllopathic & Osteopathic Physicians
Taxonomy Code207ZP0102X
License Licensed in MO · 2017008742
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.
425 S EUCLID AVE, Saint Louis, MO 63110

Other Identifiers 1

Medicaid200057464MO

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. Kathleen Byrnes 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 ID4486924065
PECOS Enrollment IDI20180821003242
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 11

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.
1,291 services578 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.
310 services92 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.
245 services61 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.
154 services117 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.
153 services128 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.
54 services18 patients

Hospital Affiliations CMS Care Compare 5

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

Memorial Hospital

Acute Care Hospitals · Belleville, IL
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140185
Location4500 Memorial DriveBelleville, IL 62226 · St. Clair County
Emergency services Birthing friendly

Barnes Jewish Hospital

Acute Care Hospitals · Saint Louis, MO
4/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number260032
LocationOne Barnes-Jewish Hospital PlazaSaint Louis, MO 63110 · St. Louis City County
Emergency services Birthing friendly

Missouri Baptist Medical Center

Acute Care Hospitals · Town And Country, MO
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260108
Location3015 N Ballas RdTown And Country, MO 63131 · St. Louis County
Emergency services Birthing friendly

Barnes-Jewish West County Hospital

Acute Care Hospitals · Creve Coeur, MO
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260162
Location12634 Olive BoulevardCreve Coeur, MO 63141 · St. Louis County
Emergency services

St Lukes Hospital

Acute Care Hospitals · Chesterfield, MO
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260179
Location232 S Woods Mill RdChesterfield, MO 63017 · St. Louis County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63110 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
$128.28 typical visit price
range $55.65 – $169.38
Typical copayment $32.07 (range $13.91 – $42.34)
Most-billed visit code 99204
Established Patient
$98.37 typical visit price
range $17.76 – $137.92
Typical copayment $24.59 (range $4.44 – $34.48)
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.

79.29/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality71.46
Promoting Interoperability100
Improvement Activities40
Cost59.51

Other Providers at the Same Location NPPES 13

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

Pathology (Anatomic Pathology)
425 S EUCLID AVE, DIV PA, ANATOMIC AND MOLECULAR PATHOLOGY
SAINT LOUIS, MO 63110
Pathology (Clinical Pathology)
425 S EUCLID AVE, DIV PA LAB AND GENOMIC MED
SAINT LOUIS, MO 63110
Pathology (Anatomic Pathology)
425 S EUCLID AVE, DIV PA, ANATOMIC AND MOLECULAR PATHOLOGY
SAINT LOUIS, MO 63110
Pathology (Anatomic Pathology)
425 S EUCLID AVE
SAINT LOUIS, MO 63110
Pathology (Anatomic Pathology & Clinical Pathology)
425 S EUCLID AVE, 3RD FLOOR
SAINT LOUIS, MO 63110
Internal Medicine (Allergy & Immunology)
425 S EUCLID AVE
SAINT LOUIS, MO 63110
Pathology (Anatomic Pathology & Clinical Pathology)
425 S EUCLID AVE, DEPT PATHOLOGY
SAINT LOUIS, MO 63110
Pathology (Anatomic Pathology)
425 S EUCLID AVE, DIV PA, ANATOMIC AND MOLECULAR PATHOLOGY
SAINT LOUIS, MO 63110

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 Kathleen Byrnes's NPI number?

The NPI number for Kathleen Byrnes is 1417399676. It was assigned to this individual provider in the NPPES registry on July 29, 2013.

Where is Kathleen Byrnes located?

Kathleen Byrnes practices at 425 S Euclid Ave Div PA, Anatomic And Molecular Pathology, Saint Louis, MO 63110. The listed phone number is (314) 362-5641.

What is Kathleen Byrnes's specialty?

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

Is Kathleen Byrnes enrolled in Medicare?

Yes. Kathleen Byrnes 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 Kathleen Byrnes affiliated with any hospitals?

According to CMS data, Kathleen Byrnes is affiliated with Memorial Hospital, Barnes Jewish Hospital, Missouri Baptist Medical Center, Barnes-Jewish West County Hospital and St Lukes Hospital.

When was this NPI record last updated?

The NPPES record for Kathleen Byrnes was last updated on April 15, 2025. NPI Profile syncs with the weekly NPPES data releases published by CMS.