MARIA CAROLA ZALLES (MD) – Cytopathology Physician, NPI 1134183759
Cytopathology Physician
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Doctor Profile
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Profile Insights
NPPES metrics only — not quality of care.
311 PATHOLOGY in IN
Provider Addresses for MARIA CAROLA ZALLES (MD)
550 University Blvd
Indianapolis, IN 462025149
Phone: (317) 944-5000
Type: Location
250 N SHADELAND AVE
INDIANAPOLIS, IN 462194959
Phone:
Type: Mailing
Seton Medical Center Williamson, 201, Seton Parkway, Round Rock, Williamson County, Texas, 78665, United States
SETON MEDICAL CENTER WILLIAMSON, DEPT. OF PATHOLOGY
ROUND ROCK, TX 786658000
Phone: (203) 676-8400
Type: Location
Law Office of Nels C. Hansen PC, 1000, Heritage Center Circle, Round Rock, Williamson County, Texas, 78664, United States
C/O PATHOLOGY RESOURCE CONSULTANTS
ROUND ROCK, TX 786644463
Phone: (203) 676-8400
Fax: (512) 238-3102
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 2 Open Payments records for all available years, with a total value of $41.
Total Amount is formed as General ($41) + Research ($0) + Ownership ($0) = $41.
Last reported payment date: 2024-05-07 • Largest payer in this snapshot: Merck Sharp & Dohme LLC ($23).
Total Amount
$41
General + Research + Ownership
Payments
2
Total payment records
General Amount
$41
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-05-07
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Merck Sharp & Dohme LLC | $23 |
| Novartis Pharmaceuticals Corporation | $18 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2025-11-29
PECOS data refreshed: 2026-06-15
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 3 Medicare enrollment records; no due dates published yet.
Enrollment records
3
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20111101000749 | I | Pathology | FL | TBD |
| I20250926003960 | I | Pathology | GA | TBD |
| I20251129000145 | I | Pathology | IN | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 88307 | Pathology examination of tissue using a microscope, moderately high complexity | 271 | 81 | $0 |
| 88305 | Pathology examination of tissue using a microscope, intermediate complexity | 266 | 154 | $0 |
| 88360 | Microscopic genetic analysis of tumor, manual | 166 | 42 | $0 |
| 88342 | Special stained specimen slides to examine tissue, initial procedure | 151 | 95 | $0 |
| 88341 | Special stained specimen slides to examine tissue, each additional procedure | 143 | 62 | $0 |
Insurance plans in this area (ZIP 46202)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| PATHOLOGY | TX | 88304 | Pathology examination of tissue using a microscope, moderately low complexity | 65 | 56 |
| PATHOLOGY | TX | 88307 | Pathology examination of tissue using a microscope, moderately high complexity | 35 | 27 |
| PATHOLOGY | TX | 88342 | Tissue or cell analysis by immunologic technique | 24 | 19 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| P A T H O L O G Y | TX | |
| P A T H O L O G Y | GA | |
| P A T H O L O G Y | AL | |
| P A T H O L O G Y | GA | |
| P A T H O L O G Y | GA | |
| P A T H O L O G Y | GA | |
| P A T H O L O G Y | GA | |
| - | FL | |
| P A T H O L O G Y | GA | |
| P A T H O L O G Y | IL |
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