Diana Gritsenko
Diana Gritsenko is a Critical Care Pharmacist in New Haven, CT, registered under NPI 1043862121. 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 20 YORK ST, New Haven, CT 06510. 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 |
|---|---|---|
| 0014031 | CT | Critical Care Pharmacist primary |
This provider holds licence 0014031 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 Critical Care covers
A licensed pharmacist who has demonstrated specialized knowledge and skill in the delivery of patient care services by pharmacists, as integral members of interprofessional teams, working to ensure the safe and effective use of medications in critically ill patients. NUCC Health Care Provider Taxonomy, code 1835C0205X
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 | 1043862121 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jul 10, 2019 |
| Last updated | Jul 10, 2019 |
| Status | Active |
| Sole proprietor | Yes |
| Practice address |
20 YORK ST New Haven, CT 06510 (203) 688-7782 |
| Mailing address |
27223 TOWN WALK DR Hamden, CT 06518 |
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 | 4 | 3 | 8 | 6 | 2 | 1 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 8 | 3 | 7 | 6 | 4 | 1 | 4 |
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.