Mark B. Fabi, M.D., P.C.
NPI 1689927774 · Psychologist · Philadelphia, PA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark B. Fabi, M.D., P.C. is a Psychologist organization in Philadelphia, PA (NPI 1689927774).
Provider details
- NPI number
- 1689927774
- Entity type
- Organization
- Primary specialty
- PsychologistBehavioral Health & Social Service Providers
- Organization subpart
- No
- Authorized official
- Helene Friedman, Assisstant(856) 261-4053
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
13 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
Mailing address
Registry dates
- Enumerated
- 2012-10-26
- Last updated
- 2018-06-20
Frequently asked questions
- What is Mark B. Fabi, M.D., P.C.'s NPI number?
- Mark B. Fabi, M.D., P.C.'s National Provider Identifier (NPI) is 1689927774, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Mark B. Fabi, M.D., P.C.?
- Mark B. Fabi, M.D., P.C. is classified in the NPPES registry as Psychologist (Behavioral Health & Social Service Providers).
- Where is Mark B. Fabi, M.D., P.C. located?
- Mark B. Fabi, M.D., P.C.'s practice location on file with NPPES is 834 Chestnut St, Philadelphia, PA 19107-5127.
- What is Mark B. Fabi, M.D., P.C.'s phone number?
- The practice phone number listed in the NPPES registry for Mark B. Fabi, M.D., P.C. is (856) 261-4053.
- Does Mark B. Fabi, M.D., P.C. accept Medicare?
- Mark B. Fabi, M.D., P.C. is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Mark B. Fabi, M.D., P.C.?
- The authorized official listed on Mark B. Fabi, M.D., P.C.'s NPPES record is Helene Friedman, Assisstant. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Mark B. Fabi, M.D., P.C.'s NPI active?
- Yes — Mark B. Fabi, M.D., P.C.'s NPI (1689927774) is active in the NPPES registry as of the last update on 2018-06-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.