IndividualActive
Caleb Siefert, PHD
NPI 1598837379 · Psychologist · Boston, MA
Caleb Siefert, PHD is a Psychologist provider in Boston, MA (NPI 1598837379).
Provider details
- NPI number
- 1598837379
- Entity type
- Individual
- Primary specialty
- PsychologistBehavioral Health & Social Service Providers
- Credential
- PHD
- Sex
- Male
- Sole proprietor
- No
- License
- PSY8611 (MA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(90/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
55 Fruit Street
Blk 11 Mgh Psychiatry Service
Boston, MA 02114
Phone: (617) 724-9144
Street-level locationGet directions
Mailing address
Po Box 9142
Charlestown, MA 02129-9142
Registry dates
- Enumerated
- 2006-11-15
- Last updated
- 2007-07-08
Frequently asked questions
- What is Caleb Siefert's NPI number?
- Caleb Siefert's National Provider Identifier (NPI) is 1598837379, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Caleb Siefert's specialty?
- Caleb Siefert is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).
- Where is Caleb Siefert located?
- Caleb Siefert's practice location on file with NPPES is 55 Fruit Street, Boston, MA 02114.
- What is Caleb Siefert's phone number?
- The practice phone number listed in the NPPES registry for Caleb Siefert is (617) 724-9144.
- Is Caleb Siefert's NPI active?
- Yes — Caleb Siefert's NPI (1598837379) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.