Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mr. Donald Kevin Zettervall, RPH, CDE, CDM
Pharmacist in Old Saybrook, CT · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1619959053
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Registry record
Entity type Individual (Type 1)
Name Mr. Donald Kevin Zettervall
Credential RPH, CDE, CDM
Sex Male
Practice address 134 Boston Post Rd, Suite 2 the Diabetes Center, Old Saybrook, CT, 06475
Phone (860) 388-6677
Fax (860) 388-3256
Enumeration date Nov 18, 2005
Last updated in NPPES Sep 11, 2025
Taxonomy & licenses
RPH · Registered Pharmacist: A licensed pharmacist registered with a state board of pharmacy.
About the RPH credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| OV6291 | Other | CT | HEALTHNET |
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Donald Zettervall?
Donald Zettervall is registered in NPPES with the primary taxonomy of Pharmacist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.