Quick answers
- Does Gnanaraj Koilpillai accept Medicare assignment?
- Yes. Medicare's clinician data says Gnanaraj Koilpillai 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 Gnanaraj Koilpillai see?
- In 2024, CMS data shows 110 Original Medicare patients and 365 services for Gnanaraj Koilpillai. This counts Original Medicare only and measures volume, not quality.
- What is Gnanaraj Koilpillai's NPI number?
- 1245218064. 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 Gnanaraj Koilpillai, 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 | 110 |
|---|---|
| Services billed to Medicare | 365 |
| Different services or procedures | 22 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Anticoagulant management of patient taking warfarin (93793)69 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)57 services
- Assessment of emotional or behavioral problems (96127)38 services
- Blood glucose (sugar) test performed by hand-held instrument (82962)37 services
- Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report (95251)28 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%
- Diabetes52%
- Ischemic heart disease45%
- Atrial fibrillation45%
- Arthritis43%
Practice locations
Addresses where Gnanaraj Koilpillai is enrolled with Medicare (CMS data updated October 2, 2026).
- 201 S Cleveland AveHagerstown, MD 21740 (301) 745‑3777
- 201 S Cleveland Ave, Family Healthcare of HagerstownHagerstown, MD 21740 (301) 745‑3777
Group practices
Medicare enrollment lists Gnanaraj Koilpillai as a member of this group (CMS data updated October 2, 2026).
- Walnut Street Community Health Center, Inc.18 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Hagerstown
Clinicians with the same Medicare primary specialty in Hagerstown, MD — not a recommendation.
Other clinicians in Walnut Street Community Health Center, Inc.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1994 (32 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1245218064 |
| 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
- 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