Quick answers
- Does Maria C. Castellano accept Medicare assignment?
- Yes. Medicare's clinician data says Maria C. Castellano accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Maria C. Castellano see?
- In 2024, CMS data shows 633 Original Medicare patients and 1,477 services for Maria C. Castellano. This counts Original Medicare only and measures volume, not quality.
- What is Maria C. Castellano's NPI number?
- 1306950100. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Maria C. Castellano, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 633 |
|---|---|
| Services billed to Medicare | 1,477 |
| Different services or procedures | 26 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)402 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)291 services
- Biopsy of large bowel using a flexible endoscope (45380)185 services
- Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)124 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)104 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Arthritis55%
- Diabetes36%
- Anxiety30%
- Chronic kidney disease27%
Hospitals where Maria C. Castellano works
Medicare's Facility Affiliation Data lists Maria C. Castellano at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- SGMC HealthValdosta, GA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 110122
- SGMC Health LanierLakeland, GA · Critical Access Hospital · Emergency services: listed by Medicare · CCN 111326
Practice locations
Addresses where Maria C. Castellano is enrolled with Medicare (CMS data updated October 2, 2026).
- 2501 N Patterson StValdosta, GA 31602 (229) 588‑4688
Specialties
- Gastroenterologyprimary
- Internal Medicinealso
Other gastroenterologists in Valdosta
Clinicians with the same Medicare primary specialty in Valdosta, GA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1990 (36 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1306950100 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians