THE GREENWICH MEDICAL GROUP
THE GREENWICH MEDICAL GROUP is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1558436766, based in Greenwich, CT. The organization lists 4 taxonomy classifications, with Internal Medicine Physician recorded as primary.
Getting there
The practice address on file is 75 HOLLY HILL LN, Greenwich, CT 06830. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 001163 | CT | Medical Physician Assistant |
This provider holds licence 001163 issued in CT. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
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
All registered taxonomy codes
This provider registers 4 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207R00000X | Internal Medicine Physician | — | CT | primary |
| 207RC0000X | Cardiovascular Disease Physician Cardiovascular Disease | — | CT | |
| 207RP1001X | Pulmonary Disease Physician Pulmonary Disease | — | CT | |
| 363AM0700X | Medical Physician Assistant Medical | 001163 | CT |
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-2 identifies an organization — a clinic, hospital, group practice, laboratory, or supplier. Individual clinicians working there hold their own NPI-1 numbers separately, so a bill may reference both.
| NPI | 1558436766 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Nov 22, 2006 |
| Last updated | Jun 17, 2009 |
| Status | Active |
| Practice address |
75 HOLLY HILL LN Greenwich, CT 06830 (203) 869-6960 |
| Other identifiers |
004393948
· Medicaid (CT) C30447 · Other (CT) 471501 · Other (CT) 8170815 · Other (CT) |
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 | 5 | 5 | 8 | 4 | 3 | 6 | 7 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 5 | 1 | 8 | 8 | 3 | 3 | 7 | 3 |
Sum = 64 · next multiple of 10 = 70 · check digit = 6 · actual last digit = 6
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.