Joanna Mazer, PAC
NPI 1821276908 · Physician Assistant · Coatesville, PA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joanna Mazer, PAC is a Physician Assistant provider in Coatesville, PA (NPI 1821276908).
Provider details
- NPI number
- 1821276908
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PAC
- Sex
- Female
- Sole proprietor
- No
- License
- MA050871 (PA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 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
- 2008-01-31
- Last updated
- 2009-09-10
Frequently asked questions
- What is Joanna Mazer's NPI number?
- Joanna Mazer's National Provider Identifier (NPI) is 1821276908, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joanna Mazer's specialty?
- Joanna Mazer is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Joanna Mazer located?
- Joanna Mazer's practice location on file with NPPES is 201 Reeceville Rd, Coatesville, PA 19320-1542.
- What is Joanna Mazer's phone number?
- The practice phone number listed in the NPPES registry for Joanna Mazer is (610) 383-8434.
- Does Joanna Mazer accept Medicare?
- Joanna Mazer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joanna Mazer's NPI active?
- Yes — Joanna Mazer's NPI (1821276908) is active in the NPPES registry as of the last update on 2009-09-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.