Andres Nieto, M.D.
Andres Nieto, M.D. is an Internal Medicine Physician in San Francisco, CA, registered under NPI 1740342492. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
The practice address on file is 1 CALIFORNIA ST STE 2300, San Francisco, CA 94111. 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 |
|---|---|---|
| 0101242364 | VA | Internal Medicine Physician primary |
| ME130371 | FL | Internal Medicine Physician |
| 269158 | MA | Internal Medicine Physician |
| C1-0011949 | DE | Internal Medicine Physician |
| 25MA10054800 | NJ | Internal Medicine Physician |
| D82114 | MD | Internal Medicine Physician |
| MD15546 | RI | Internal Medicine Physician |
| 01077411A | IN | Internal Medicine Physician |
| 285948 | NY | Internal Medicine Physician |
| MD459148 | PA | Internal Medicine Physician |
| 4301111101 | MI | Internal Medicine Physician |
| 55884 | CT | Internal Medicine Physician |
| 042.0013646 | VT | Internal Medicine Physician |
| MD21235 | ME | Internal Medicine Physician |
Licences are recorded in 14 states: VA, FL, MA, DE, NJ, MD, RI, IN, NY, PA, MI, CT, VT, ME. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
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.
Licensed in 14 states
This provider holds licences in 14 states: Connecticut, Delaware, Florida, Indiana, Massachusetts, Maryland, Maine, Michigan, New Jersey, New York, Pennsylvania, Rhode Island, Virginia and Vermont. Multi-state licensure often means the provider works near a state border, covers more than one office, or delivers care by telehealth. If the address above is far from you, it is worth calling to ask whether they practise closer to where you live.
Licence numbers are self-reported to NPPES at registration. They do not confirm a licence is currently active, in good standing, or valid for the specialty shown — only the state board can tell you that, which is why we link to each one.
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 14 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 | 0101242364 | VA | primary |
| 207R00000X | Internal Medicine Physician | ME130371 | FL | |
| 207R00000X | Internal Medicine Physician | 269158 | MA | |
| 207R00000X | Internal Medicine Physician | C1-0011949 | DE | |
| 207R00000X | Internal Medicine Physician | 25MA10054800 | NJ | |
| 207R00000X | Internal Medicine Physician | D82114 | MD | |
| 207R00000X | Internal Medicine Physician | MD15546 | RI | |
| 207R00000X | Internal Medicine Physician | 01077411A | IN | |
| 207R00000X | Internal Medicine Physician | 285948 | NY | |
| 207R00000X | Internal Medicine Physician | MD459148 | PA | |
| 207R00000X | Internal Medicine Physician | 4301111101 | MI | |
| 207R00000X | Internal Medicine Physician | 55884 | CT | |
| 207R00000X | Internal Medicine Physician | 042.0013646 | VT | |
| 207R00000X | Internal Medicine Physician | MD21235 | ME |
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 | 1740342492 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Dec 15, 2006 |
| Last updated | Dec 20, 2023 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | M.D. |
| Practice address |
1 CALIFORNIA ST STE 2300 San Francisco, CA 94111 (800) 997-6196 Fax (415) 504-1367 |
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 | 7 | 4 | 0 | 3 | 4 | 2 | 4 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 7 | 8 | 0 | 6 | 4 | 4 | 4 | 9 |
Sum = 68 · next multiple of 10 = 70 · check digit = 2 · actual last digit = 2
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.