Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Ms. Constance Ann Castelli Greene, RN MS CDE RD CDN CMH
Nutritionist in Milford, CT · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1811191554
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Registry record
Entity type Individual (Type 1)
Name Ms. Constance Ann Castelli Greene
Credential RN MS CDE RD CDN CMH
Sex Female
Practice address 284 Quarry Road, Suite 7, Milford, CT, 06460
Phone (203) 414-7612
Fax (203) 877-5918
Enumeration date Jun 14, 2007
Last updated in NPPES Sep 11, 2025
Taxonomy & licenses
133V00000X Registered Dietitian Dietary & Nutritional Service Providers · License 000245 RD (CT) Secondary
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| OV6321 | Other | CT | HEALTHNET |
| P2593836 | Other | CT | OXFORD |
| 270000245CT01 | Other | CT | ANTHEM |
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
What specialty is Constance Greene?
Constance Greene is registered in NPPES with the primary taxonomy of Nutritionist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
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.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.