Sydney Messlein, PA-C
NPI 1215507447 · Physician Assistant · Galveston, TX
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sydney Messlein, PA-C is a Physician Assistant provider in Galveston, TX (NPI 1215507447).
Provider details
- NPI number
- 1215507447
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Female
- Sole proprietor
- No
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
4 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
- 2021-06-29
- Last updated
- 2023-03-02
- Certified
- 2023-03-02
Frequently asked questions
- What is Sydney Messlein's NPI number?
- Sydney Messlein's National Provider Identifier (NPI) is 1215507447, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sydney Messlein's specialty?
- Sydney Messlein is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Sydney Messlein located?
- Sydney Messlein's practice location on file with NPPES is 815 Market St, Galveston, TX 77550-2725.
- What is Sydney Messlein's phone number?
- The practice phone number listed in the NPPES registry for Sydney Messlein is (409) 770-6515.
- Does Sydney Messlein accept Medicare?
- Sydney Messlein is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sydney Messlein's NPI active?
- Yes — Sydney Messlein's NPI (1215507447) is active in the NPPES registry as of the last update on 2023-03-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.