Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Carla J Williams, M.D.
Specialist in Greenwich, CT · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1073589396
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Registry record
Entity type Individual (Type 1)
Name Dr. Carla J Williams
Credential M.D.
Sex Female
Practice address 159 W Putnam Ave, Greenwich, CT, 06830
Phone (203) 869-7080
Fax (203) 869-7034
Enumeration date Feb 27, 2006
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 2647207 | Other | CT | AETNA |
| P696779 | Other | CT | OXFORD |
| 031982 | Other | CT | CONNECTICARE |
| CV5863 | Other | CT | HEALTHNET |
| 010031982CT01 | Other | CT | ANTHEM BCBS OF CT |
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 is the NPI number for Carla Williams?
The National Provider Identifier (NPI) for Carla Williams is 1073589396, a Type 1 (individual) record in the CMS NPPES registry.
Where does Carla Williams practice?
The practice location on file with NPPES is in Greenwich, CT. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.