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Internal Medicine

Sandeep K. Mallipattu, MD

Works at hospitals in Stony Brook, NY · New York

Summary

Dr. Sandeep K. Mallipattu, MD is an internal medicine doctor at 100 Nicolls Rd, Stony Brook, NY 11794. Phone: (631) 444-1560. Accepts Medicare assignment. In 2024, Sandeep K. Mallipattu had 115 Original Medicare patients and 241 services. NPI 1619139094. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: Internal medicine doctor (Medicare lists Internal Medicine)
  • Address: 100 Nicolls Rd, Stony Brook, NY 11794 · Directions (2 more locations)
  • Phone: (631) 444‑1560
  • Medicare: Accepts Medicare assignment
  • Hospital: Suny/Stony Brook University Hospital
  • Group practice: Stony Brook Internists University Faculty Practice Corporation
  • Medical school: Boston University School Of Medicine · graduated 2007 (19 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Sandeep K. Mallipattu, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Sandeep K. Mallipattu accept Medicare assignment?
Yes. Medicare's clinician data says Sandeep K. Mallipattu 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 Sandeep K. Mallipattu see?
In 2024, CMS data shows 115 Original Medicare patients and 241 services for Sandeep K. Mallipattu. This counts Original Medicare only and measures volume, not quality.
What is Sandeep K. Mallipattu's NPI number?
1619139094. 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 Sandeep K. Mallipattu, 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 patients115
Services billed to Medicare241
Different services or procedures10
Participating Medicare providerYes
Average age of these patients71

Most frequent services

  1. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)135 services
  2. Hemodialysis procedure with physician evaluation (90935)26 services
  3. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)25 services
  4. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)21 services
  5. Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)15 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%
  • Chronic kidney disease75%
  • Ischemic heart disease70%
  • Heart failure66%
  • Diabetes55%

Hospitals where Sandeep K. Mallipattu works

Medicare's Facility Affiliation Data lists Sandeep K. Mallipattu 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.

Practice locations

Addresses where Sandeep K. Mallipattu is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Sandeep K. Mallipattu as a member of this group (CMS data updated October 2, 2026).

  • Stony Brook Internists University Faculty Practice Corporation428 clinicians in the group

Specialties

Find other Internal Medicine doctors in New York →

Other internal medicine doctors in Stony Brook

Clinicians with the same Medicare primary specialty in Stony Brook, NY — not a recommendation.

All internal medicine doctors in Stony Brook →

Other clinicians in Stony Brook Internists University Faculty Practice Corporation

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

Clinician information

CredentialMD
Medical schoolBoston University School Of Medicine
Graduation year2007 (19 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1619139094
CorrectionsReport 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

  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