NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Randolph Mark Diamond, D.D.S., M.S.

General Practice Dentistry in New York, NY · enumerated 2007 · practices at Georgia Rose, Cnm, Inc.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1023213485

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Randolph Mark Diamond
Credential D.D.S., M.S.
Sex Male
Practice address New York, NY, 10023
Phone (212) 873-2651
Enumeration date Jun 17, 2007
Last updated in NPPES Feb 8, 2017

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 034048 (NY) Primary
DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential

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.

Read the full guide → Validate an NPI →

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 Randolph Diamond?
Randolph Diamond is registered in NPPES with the primary taxonomy of General Practice Dentistry. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-02-08.