Deepshikha Nag Chowdhury

Medicare activity in 2024

Official CMS public-use data for Deepshikha Nag Chowdhury, 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.

Most frequent services

1. Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)70 services
2. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)59 services
3. Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)56 services
4. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)45 services
5. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)27 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 cholesterol75%
• High blood pressure69%
• Arthritis42%
• Anxiety32%
• Diabetes26%
• Depression26%

Hospitals where Deepshikha Nag Chowdhury works

Medicare's Facility Affiliation Data lists Deepshikha Nag Chowdhury 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.

• Catholic Medical CenterManchester, NH · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 300034
• Elliot HospitalManchester, NH · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 300012
• Parkland Medical CenterDerry, NH · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 300017

Practice locations

Addresses where Deepshikha Nag Chowdhury is enrolled with Medicare (CMS data updated October 2, 2026).

• 18 Orchard View Dr, Unit 2Londonderry, NH 03053 (603) 432‑8802

Group practices

Medicare enrollment lists Deepshikha Nag Chowdhury as a member of this group (CMS data updated October 2, 2026).

• Granite State Gastrointestinal Consultants PLLC6 clinicians in the group

Specialties

• Gastroenterologyprimary
• Internal Medicinealso

Find other Gastroenterology doctors in New Hampshire →

Other gastroenterologists in New Hampshire

Clinicians with the same Medicare primary specialty in New Hampshire — not a recommendation.

• Mark K. Detweiler, MD
• Laura Horton, MD
• Michael W. Winter, MD
• Myles D. Keroack, MD
• Jassir Witta, MD
• Michelle C. Le, DO
• Steven Tsistrakis
• Shelby A. Sullivan, MD

All gastroenterologists in New Hampshire →

Other clinicians in Granite State Gastrointestinal Consultants PLLC

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Steven Tsistrakis
• Leon P. McLean, MD
• Laura Horton, MD

Clinician information

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

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians