Mary Shirk, PSYD
NPI 1629698774 · Clinical Psychologist · Philadelphia, PA
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Shirk, PSYD is a Clinical Psychologist provider in Philadelphia, PA (NPI 1629698774).
Provider details
- NPI number
- 1629698774
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PSYD
- Sex
- Female
- Sole proprietor
- No
- License
- PS019648 (PA)
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
6 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Additional practice locations (1)
- 255 S 17th StPhiladelphia, PA 19103-6231Phone: (610) 892-3800
Registry dates
- Enumerated
- 2020-04-19
- Last updated
- 2025-03-21
- Certified
- 2025-03-21
Frequently asked questions
- What is Mary Shirk's NPI number?
- Mary Shirk's National Provider Identifier (NPI) is 1629698774, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Shirk's specialty?
- Mary Shirk is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Mary Shirk located?
- Mary Shirk's practice location on file with NPPES is 3535 Market St Ste 1230, Philadelphia, PA 19104-6509.
- What is Mary Shirk's phone number?
- The practice phone number listed in the NPPES registry for Mary Shirk is (610) 892-3800.
- Does Mary Shirk accept Medicare?
- Mary Shirk is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Shirk's NPI active?
- Yes — Mary Shirk's NPI (1629698774) is active in the NPPES registry as of the last update on 2025-03-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.