Sylvia Knowlton, M.D.
Sylvia Knowlton, M.D. is an Allergy & Immunology (Internal Medicine) Physician in Alfred Station, NY, registered under NPI 1164553319.
Getting there
The practice address on file is 1549 WATERWELLS RD, Alfred Station, NY 14803. 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 |
|---|---|---|
| 193544 | NY | Allergy & Immunology (Internal Medicine)… primary |
| ME34668 | FL | Allergy & Immunology (Internal Medicine)… |
| 2722A | WY | Allergy & Immunology (Internal Medicine)… |
| 01026292A | IN | Allergy & Immunology (Internal Medicine)… |
| 21239 | CO | Allergy & Immunology (Internal Medicine)… |
Licences are recorded in 5 states: NY, FL, WY, IN, CO. 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 5 states
This provider holds licences in 5 states: Colorado, Florida, Indiana, New York and Wyoming. The practice address on file is in Alfred Station, NY, but a licence in another state usually means they see patients there too — either at a second location or 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
- 193544
- Specialty
- Allergy & Immunology (Internal…
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 Allergy & Immunology covers
An internist doctor of osteopathy that specializes in the treatment of allergy and immunologic disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine can obtain a Certificate of Special Qualifications in the field of Allergy & Immunology. NUCC Health Care Provider Taxonomy, code 207RA0201X
All registered taxonomy codes
This provider registers 5 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207RA0201X | Allergy & Immunology (Internal Medicine) Physician Allergy & Immunology | 193544 | NY | primary |
| 207RA0201X | Allergy & Immunology (Internal Medicine) Physician Allergy & Immunology | ME34668 | FL | |
| 207RA0201X | Allergy & Immunology (Internal Medicine) Physician Allergy & Immunology | 2722A | WY | |
| 207RA0201X | Allergy & Immunology (Internal Medicine) Physician Allergy & Immunology | 01026292A | IN | |
| 207RA0201X | Allergy & Immunology (Internal Medicine) Physician Allergy & Immunology | 21239 | CO |
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 | 1164553319 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 8, 2007 |
| Last updated | Jul 8, 2007 |
| Status | Active |
| Sole proprietor | No |
| Credential | M.D. |
| Practice address |
1549 WATERWELLS RD Alfred Station, NY 14803 (607) 587-9008 |
| Mailing address |
PO BOX 64 Alfred Station, NY 14803 |
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 | 1 | 6 | 4 | 5 | 5 | 3 | 3 | 1 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 1 | 3 | 4 | 1 | 5 | 6 | 3 | 2 |
Sum = 51 · next multiple of 10 = 60 · check digit = 9 · actual last digit = 9
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.