Stephanie Messina, PA
NPI 1912202987 · Physician Assistant · San Francisco, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephanie Messina, PA is a Physician Assistant provider in San Francisco, CA (NPI 1912202987).
Provider details
- NPI number
- 1912202987
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA
- Sex
- Female
- Sole proprietor
- No
- License
- PA21409 (CA)
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 tenure33% of score
15 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 32 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Memantine Hcl | 128 | 33 |
| Donepezil Hcl | 102 | 35 |
| Quetiapine Fumarate | 78 | 21 |
| Carbidopa/Levodopabrand: Carbidopa-Levodopa | 77 | 17 |
| Galcanezumab-Gnlmbrand: Emgality Pen | 72 | 13 |
| Citalopram Hydrobromidebrand: Citalopram Hbr | 69 | 15 |
| Pramipexole Di-Hclbrand: Pramipexole Dihydrochloride |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,715 across 120 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-01-21
- Last updated
- 2026-03-30
- Certified
- 2026-03-30
Frequently asked questions
- What is Stephanie Messina's NPI number?
- Stephanie Messina's National Provider Identifier (NPI) is 1912202987, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephanie Messina's specialty?
- Stephanie Messina is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Stephanie Messina located?
- Stephanie Messina's practice location on file with NPPES is 2340 Clay St Fl 6, San Francisco, CA 94115-1932.
- What is Stephanie Messina's phone number?
- The practice phone number listed in the NPPES registry for Stephanie Messina is (424) 444-7399.
- Does Stephanie Messina accept Medicare?
- Stephanie Messina is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephanie Messina's NPI active?
- Yes — Stephanie Messina's NPI (1912202987) is active in the NPPES registry as of the last update on 2026-03-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.