Narinder Singh, M.D.
Narinder Singh, M.D. is an Internal Medicine Physician in Stony Brook, NY, registered under NPI 1003279035. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
Here is what surrounds this office in Stony Brook, based on OpenStreetMap data collected Sep 15, 2026. Parking is available about 0.23 mi away. The nearest transit stop is 0.44 mi away, served by H Quad. If you arrive early, there is a coffee shop 0.44 mi away.
Getting here and what is nearby
Restaurant Curry Club 709 ft ~3 min
10 Woods Corner Road, Setauket-East Setauket 11733
Parking 796 ft ~4 min
Parking 805 ft ~4 min
Restaurant Eastern Pavillion 954 ft ~4 min
Restaurant Xiao Si Chuan 0.20 mi ~4 min
Parking 0.23 mi ~5 min
Gas station BP 0.24 mi ~5 min
Route 25A, Setauket-East Setauket 11733
Transit Benedict 0.34 mi ~7 min
Transit North P Lot 0.35 mi ~8 min
Gas station Sunoco 0.40 mi ~9 min
Convenience 7-Eleven 0.42 mi ~9 min
1001 North Country Road, Setauket-East Setauket 11790
Transit H Quad 0.44 mi ~9 min
Coffee Kung Fu Tea 0.44 mi ~9 min
1009 Route 25A, Stony Brook 11790
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 300611 | NY | Internal Medicine Physician primary |
This provider holds licence 300611 issued in NY. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Hospitalist
- PAC ID
- 6709115926
- Enrollment ID
- I20190912001104
Medicare enrolment is recorded as approved under the provider type Practitioner - Hospitalist. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Internal Medicine covers
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs. NUCC Health Care Provider Taxonomy, code 207R00000X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1003279035 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 29, 2016 |
| Last updated | Sep 10, 2019 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Credential | M.D. |
| Practice address |
101 NICOLLS RD Stony Brook, NY 11794 (631) 444-4000 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 0 | 0 | 3 | 2 | 7 | 9 | 0 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 4 | 7 | 9 | 0 | 6 |
Sum = 55 · next multiple of 10 = 60 · check digit = 5 · actual last digit = 5
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.