Physician Profile
Maria C. Zalles, MD
Unclaimed ProfileAbout Dr. Zalles
Maria C. Zalles, MD is a healthcare provider in Round Rock, TX specializing in pathology. Maria is also listed as specializing in cytopathology and anatomic & clinical pathology. Medicare claims data shows Maria provided 1,435 services to 738 patients. The services billed most often include pathology examination of tissue using a microscope, intermediate complexity, special stained specimen slides to examine tissue, each additional procedure, and pathology examination of tissue using a microscope, moderately high complexity. This provider record is associated with NPI 1134183759.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (203) 676-8400
- Email not available
Practice Locations
201 SETON PKWY SETON MEDICAL CENTER WILLIAMSON, DEPT. OF PATHOLOGY
Round Rock, TX 78665
550 University Blvd
Indianapolis, IN 46202
Conditions Evaluated or Diagnosed
Within Pathology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Autoimmune & Joints
Autopsy & Forensic
Blood & Metabolism
Blood Disorders
- Bleeding Disorders
- Blood Clotting Gene Mutation
- Iron-deficiency anemia
- Leukemia
- Lymphoma
- Multiple Myeloma
- Sickle cell disease
Cancer
- Bladder cancer
- Bone tumors
- Brain tumor
- Breast cancer
- Cervical cancer
- Colon cancer
- Endometrial cancer
- Kidney cancer
- Liver cancer
- Lung cancer
- Oral cavity cancer
- Ovarian cancer
- Pancreatic cancer
- Prostate cancer
- Soft-tissue sarcoma
- Stomach cancer
- Testicular cancer
- Thyroid cancer
Cervical & Gynecologic
Digestive
Digestive System
Endocrine
Genetics
Hormones
Immune System
Infections
Kidney
Liver
Metabolic & Routine Lab
Pregnancy & Fertility
Skin Cancer
Women's Health
Procedures & services
Autopsy & Forensic
Blood Tests
- Blood Clotting Tests
- Blood Type Test
- Cholesterol screening
- Complete Blood Count
- Comprehensive Metabolic Panel
- Hemoglobin A1c Test
- Iron Level Blood Test
- Thyroid Blood Test
Cytology
Cytology & Screening
- Fine-needle aspiration of a neck mass
- Human papillomavirus testing
- Pap Smear Test
- Thyroid Nodule Biopsy Review
Genetic & Molecular Tests
Genetics
Immune & Allergy Tests
Infection Testing
Infection Tests
Lab & Blood Tests
- Cardiac enzyme blood test
- Pregnancy blood test
- Sed rate inflammation test
- Testosterone blood test
- Vitamin D blood test
Pathology Review
Pregnancy & Fertility
Routine Lab Tests
Tissue Biopsy
- Bone Marrow Biopsy Interpretation
- Breast Biopsy Analysis
- Cervical biopsy lab review
- Colon Polyp Testing
- Kidney Biopsy Examination
- Liver Biopsy Examination
- Lung biopsy lab review
- Lymph Node Biopsy Analysis
- Oral biopsy lab review
- Prostate Biopsy Analysis
- Skin Biopsy Lab Review
- Stomach biopsy lab review
- Uterine biopsy lab review
Procedures Most Often Billed to Medicare
1,435 services · 738 patients · 13 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Pathology examination of tissue using a microscope, intermediate complexity | Lab test | 88305 |
343 | As often as other peers in Pathology |
| Special stained specimen slides to examine tissue, each additional procedure | Lab test | 88341 |
225 | As often as other peers in Pathology |
| Pathology examination of tissue using a microscope, moderately high complexity | Lab test | 88307 |
186 | More often than most peers in Pathology |
| Microscopic genetic analysis of tumor, manual | Lab test | 88360 |
175 | More often than most peers in Pathology |
| Special stained specimen slides to examine tissue, initial procedure | Lab test | 88342 |
153 | More often than most peers in Pathology |
| Cell examination of specimen, selective cellular enhancement technique | Lab test | 88112 |
67 | As often as other peers in Pathology |
| Evaluation of fine needle aspirate with interpretation and report | Lab test | 88173 |
61 | More often than most peers in Pathology |
| Pathology examination of specimen during surgery, first tissue block | Lab test | 88331 |
57 | More often than most peers in Pathology |
| Pap test, evaluation of fine needle aspirate, immediate, each additional evaluation episode | Lab test | 88177 |
49 | As often as other peers in Pathology |
| Pathology examination of tissue using a microscope, limited examination | Lab test | 88300 |
35 | More often than most peers in Pathology |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other pathologists at this location 4
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other pathologists in Round Rock 4
Same specialty, same city.
More connections — 16 related providers in 2 groups
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 1984 at Other 8
Providers who graduated from the same medical school in the same year.
Common questions
What is Dr. Zalles's specialty?
Dr. Zalles is a pathologist in Round Rock, TX. That is the designation recorded for this NPI in the federal registry, where it is listed as “Pathology”.
NPI registry
Where can I find Dr. Zalles?
Dr. Zalles is listed at 201 Seton Pkwy Seton Medical Center Williamson, Dept. of Pathology, Round Rock, TX 78665. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Zalles?
The number on file is (203) 676-8400. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Dr. Zalles?
Dr. Zalles's National Provider Identifier is 1134183759. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Dr. Zalles's medical education?
Dr. Zalles attended Other, graduating in 1984. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Zalles have?
Dr. Zalles has 42 years experience. Calculated from a graduation year of 1984, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Zalles known for?
According to Medicare billing data, Dr. Zalles the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Zalles's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Zalles. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.