MARIA CAROLA ZALLES MD
NPI 1134183759
Pathology - Anatomic Pathology & Clinical Pathology in Round Rock, TX

Q: What is Maria Zalles's NPI number?

The NPI number for Maria Zalles is 1134183759. It was assigned to this individual provider in the NPPES registry on April 12, 2006.

Q: What is Maria Zalles'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 Maria Zalles was last updated on November 21, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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 April 12, 2006PECOS EnrolledAccepts Medicare Assignment

201 SETON PKWY, SETON MEDICAL CENTER WILLIAMSON, DEPT. OF PATHOLOGY, ROUND ROCK, TX 78665(203) 676-8400 Get Directions Write a Review

NPPES record last updated: November 21, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

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About Maria Carola Zalles Md NPPES

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

MARIA CAROLA ZALLES MD (NPI 1134183759) is an individual anatomic pathology & clinical pathology provider in Round Rock, Texas, licensed in Connecticut (044040) and active in the NPI registry since April 2006. She is enrolled in Medicare PECOS, is affiliated with Baptist Health Medical Center - Jacksonville, and is a graduate of Other (1984).

NPPES Registry Identity

NPI1134183759

Entity TypeIndividualFemale

Primary Taxonomy207ZP0102X

Provider Legal NameMARIA CAROLA ZALLESCredential: MD

Location Address201 SETON PKWY, SETON MEDICAL CENTER WILLIAMSON, DEPT. OF PATHOLOGYRound Rock, TX 78665-8000

Mailing Address250 N Shadeland AveIndianapolis, IN 46219-4959

Phone(203) 676-8400

Sole ProprietorNo

Medical School CMSOtherGraduated 1984

Enumeration DateApril 12, 2006

Last NPPES UpdateNovember 21, 2025

NPPES CertifiedNovember 21, 2025

✔ NPI 1134183759 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

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

Taxonomy Code207ZP0102X

Licenses✔ Licensed in CT · 044040✔ Licensed in MO · 101977✔ Licensed in GA · 102400✔ Licensed in IN · 01098530A✔ Licensed in KS · 04-23856

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.

Also ListedPathology · CytopathologyTaxonomy 207ZC0500X · License 044040 (CT), 102400 (GA)

Also ListedPathology · Pediatric PathologyTaxonomy 207ZP0213X · License 102400 (GA)

201 SETON PKWY, Round Rock, TX 78665

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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

Maria Carola Zalles 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 ID4587639463

PECOS Enrollment IDI20111101000749, I20250926003960

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 13

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.

343 services187 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.

225 services72 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.

186 services61 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.

175 services48 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 services110 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.

67 services60 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.

61 services49 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.

57 services25 patients

Pap test, evaluation of fine needle aspirate, immediate, each additional evaluation episode 88177

A Pap test is a procedure that checks for abnormal cells in the body, which could indicate a serious condition. The evaluation of a fine needle aspirate is a process where a small sample is taken with a thin needle for examination. This can be done multiple times for a thorough analysis.

49 services17 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.

35 services32 patients

Surgical pathology consultation and report on referred slides prepared elsewhere 88321

A surgical pathology consultation involves reviewing slides prepared at a different lab to confirm or clarify a diagnosis. It's a second opinion to ensure accuracy. A report with findings and interpretations is then provided for your doctor's reference.

32 services32 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).

27 services21 patients

Cell examination of specimen, concentration technique 88108

Cell examination of a specimen using a concentration technique is a lab process that enhances the detection of cells in a sample. This method helps to focus on key areas of the sample, making it easier to spot abnormalities or changes. It's a crucial part of diagnosing and monitoring certain health conditions.

25 services24 patients

Hospital Affiliations CMS Care Compare 4

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

Baptist Health Medical Center - Jacksonville

Acute Care Hospitals · Jacksonville, FL

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number100088

Location800 Prudential DrJacksonville, FL 32207 · Duval County

Emergency services Birthing friendly

Baptist Medical Center Beaches

Acute Care Hospitals · Jacksonville Beach, FL

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number100117

Location1350 13th Ave SJacksonville Beach, FL 32250 · Duval County

Emergency services Birthing friendly

Baptist Medical Center - Nassau

Acute Care Hospitals · Fernandina Beach, FL

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number100140

Location1250 S 18th StFernandina Beach, FL 32034 · Nassau County

Emergency services

Emory University Hospital Midtown

Acute Care Hospitals · Atlanta, GA

2/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number110078

Location550 Peachtree Street, NEAtlanta, GA 30308 · Fulton County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 78665 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

$126.40 typical visit price

range $54.84 – $166.88

Typical copayment $31.60 (range $13.71 – $41.72)

Most-billed visit code 99204

Established Patient

$97.05 typical visit price

range $17.52 – $136.11

Typical copayment $24.26 (range $4.38 – $34.02)

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.

KATJA PRIESTER IBCLC

Lactation Consultant, Non-RN

201 SETON PKWY
ROUND ROCK, TX 78665

Williamson County (512) 324-4000

DR. JODIE L PEPIN PHARMD

Pharmacist (Pharmacotherapy)

201 SETON PKWY, SETON MEDICAL CENTER WILLIAMSON
ROUND ROCK, TX 78665

Williamson County (512) 324-4000

WILLIAM J. REITMEYER M.D.

Pathology (Anatomic Pathology & Clinical Pathology)

201 SETON PKWY, SETON MEDICAL CENTER WILLIAMSON
ROUND ROCK, TX 78665

Williamson County (512) 814-0298

SAYF YASSIN M.D.

Internal Medicine

201 SETON PKWY
ROUND ROCK, TX 78665

Williamson County (512) 324-4170

PAULA GILHEANY ACNP-BC

Nurse Practitioner (Acute Care)

201 SETON PKWY
ROUND ROCK, TX 78665

Williamson County (512) 324-4000

MRS. ABIGAIL RUTH JAEGER

Nurse Practitioner (Acute Care)

201 SETON PKWY
ROUND ROCK, TX 78665

Williamson County (512) 324-4000

KAITLYN N. STEININGER PA-C

Physician Assistant

201 SETON PKWY
ROUND ROCK, TX 78665

Williamson County (512) 324-4170

BRITTNI MARIE ARRIGOTTI

Physician Assistant (Surgical)

201 SETON PKWY
ROUND ROCK, TX 78665

Williamson County (512) 324-4000

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 Maria Zalles's NPI number?

The NPI number for Maria Zalles is 1134183759. It was assigned to this individual provider in the NPPES registry on April 12, 2006.

Where is Maria Zalles located?

Maria Zalles practices at 201 Seton Pkwy Seton Medical Center Williamson, Dept. Of Pathology, Round Rock, TX 78665. The listed phone number is (203) 676-8400.

What is Maria Zalles's specialty?

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

Is Maria Zalles enrolled in Medicare?

Yes. Maria Zalles 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 Maria Zalles affiliated with any hospitals?

According to CMS data, Maria Zalles is affiliated with Baptist Health Medical Center - Jacksonville, Baptist Medical Center Beaches, Baptist Medical Center - Nassau and Emory University Hospital Midtown.

When was this NPI record last updated?

The NPPES record for Maria Zalles was last updated on November 21, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.