David Louisia, MD
David Louisia, MD is an Internal Medicine Physician in Danbury, CT, registered under NPI 1003475971.
Getting there
Here is what surrounds this office in Danbury, based on OpenStreetMap data collected Sep 29, 2026. Parking is available about 0.30 mi away at Terence E. McNally Patriot Garage. There is EV charging 0.30 mi from the office — useful if you are driving in from out of town. The nearest transit stop is 0.48 mi away, served by Pulse Point 7 Link. A pharmacy sits 799 ft from the entrance (Walgreens), which helps if you leave with a prescription.
Getting here and what is nearby
Parking 175 ft ~1 min
Parking 222 ft ~1 min
Pharmacy Walgreens 799 ft ~4 min
Convenience Food Bag 0.20 mi ~5 min
Gas station Citgo 0.20 mi ~5 min
Restaurant Brasilis BBQ 0.21 mi ~5 min
Restaurant Brazil Restaurant 0.22 mi ~5 min
EV charging 0.30 mi ~6 min
Parking Terence E. McNally Patriot Garage 0.30 mi ~6 min
Grocery Price Rite 0.34 mi ~7 min
23 Main Street, Danbury 06810
Gas station BP 0.37 mi ~8 min
Transit Pulse Point 5, 6, 7 0.44 mi ~9 min
3 Kennedy Avenue, Danbury 06810
Restaurant Dunkin' 0.45 mi ~10 min
10 Main Street, Danbury 06810
Mo-Sa 05:00-21:00; Su 06:00-21:00
Transit Pulse Point 1, 2, 3, 4 0.46 mi ~10 min
Drive Kennedy Avenue, Danbury
Transit Pulse Point 7 Link 0.48 mi ~10 min
Drive Kennedy Avenue, Danbury
Gas station Citgo 0.50 mi ~10 min
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 |
|---|---|---|
| 71799 | CT | Internal Medicine Physician primary |
This provider holds licence 71799 issued in CT. 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 - Internal Medicine
- PAC ID
- 8921481284
- Enrollment ID
- I20220818002425
Medicare enrolment is recorded as approved under the provider type Practitioner - Internal Medicine. 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 | 1003475971 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jun 13, 2019 |
| Last updated | Sep 5, 2024 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | MD |
| Practice address |
120 MAIN ST Danbury, CT 06810 (203) 743-0100 |
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 | 4 | 7 | 5 | 9 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 8 | 7 | 1 | 9 | 5 |
Sum = 59 · next multiple of 10 = 60 · check digit = 1 · actual last digit = 1
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.