Holly Muller, PHD
NPI 1679183230 · Psychologist · Boston, MA
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Holly Muller, PHD is a Psychologist provider in Boston, MA (NPI 1679183230).
Provider details
- NPI number
- 1679183230
- Entity type
- Individual
- Primary specialty
- PsychologistBehavioral Health & Social Service Providers
- Credential
- PHD
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
5 yrs in NPPES registry
- Profile completeness38% of score
83% 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
Mailing address
Registry dates
- Enumerated
- 2020-08-07
- Last updated
- 2020-08-21
- Certified
- 2020-08-21
Frequently asked questions
- What is Holly Muller's NPI number?
- Holly Muller's National Provider Identifier (NPI) is 1679183230, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Holly Muller's specialty?
- Holly Muller is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).
- Where is Holly Muller located?
- Holly Muller's practice location on file with NPPES is 225 Friend St, Boston, MA 02114-1800.
- What is Holly Muller's phone number?
- The practice phone number listed in the NPPES registry for Holly Muller is (703) 727-5619.
- Does Holly Muller accept Medicare?
- Holly Muller is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Holly Muller's NPI active?
- Yes — Holly Muller's NPI (1679183230) is active in the NPPES registry as of the last update on 2020-08-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.