Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Carolyn Balcom Holbrook
Social Worker in Portland, ME · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1851336788
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Registry record
Entity type Individual (Type 1)
Name Carolyn Balcom Holbrook
Sex Female
Practice address 205 Ocean Ave, Portland, ME, 04103
Phone (207) 775-1335
Enumeration date Jun 17, 2006
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 048028 | Other | ME | BC/BS |
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 Carolyn Holbrook?
Carolyn Holbrook is registered in NPPES with the primary taxonomy of Social Worker. 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.
Other providers at this practice address
Browse all → Casco Bay Substance Abuse Resource Center Case Management Agency · Portland, ME NPI 1366406886 William Harrison Clinical Social Worker · Portland, ME NPI 1568426799 James Weaver Psychologist · Portland, ME NPI 1447293741 Ronald Breazeale Psychologist · Portland, ME NPI 1780627026 Eric Johnson Social Worker · Portland, ME NPI 1043254493 Katherine Renz Social Worker · Portland, ME NPI 1083659312 Ellen Zimmerman Clinical Social Worker · Portland, ME NPI 1659300457 William Sandberg Clinical Psychologist · Portland, ME NPI 1174548572
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.