Stephanie Messina, PA
Physician Assistant · San Francisco, CA
Stephanie Messina, PA is a physician assistant with a practice address in San Francisco, California, and NPI 1912202987, issued on Jan 21, 2011. Check the license (California PA21409, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Stephanie Messina
- Credential
- PA
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA21409 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2340 Clay St FL 6, San Francisco, CA 94115
- Phone
- (424) 444-7399
- Enumerated
- Jan 21, 2011
- Record last updated
- Jun 30, 2026
- Fax
- (424) 253-0814
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 2340 Clay St FL 6
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Alicia Connor, R.D.Registered Dietitian1861927808
- James Davis, M.D.Specialist1811017254
- Anita Demas, M.D.Internal Medicine Physician1174646012
Verify Stephanie Messina in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA21409Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
63% more Medicare Part D claims than the average physician assistant in 2024
1,356 Medicare Part D claims for 195 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D.
Most prescribed
- Memantine Hcl128 claims
- Donepezil Hcl102 claims
- Quetiapine Fumarate78 claims
- Carbidopa-Levodopa77 claims
- Emgality Pen72 claims
- Citalopram Hbr69 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $2,714.72
120 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 64,719 providers of this specialty with any payment received $841.65 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Stephanie Messina among 14,451 physician assistant records in California
Stephanie Messina, PA is one of 14,451 physician assistant records with a practice address in California. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 30% of them.
- NPI issued2011 · 30% of these records are older, 67% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 50% of these records are
- Record last updated2026 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Physician Assistant providers in California
There are 14,451 physician assistant records in California.
All 14,451 in California → Every provider in San Francisco → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Melody Berman, PACSan Francisco, CA 941151538206875
- Julianne Blythe, PA-CSan Francisco, CA 941151912058017
- Sandra Hansen, P.A-CSan Francisco, CA 941151104871334
- Laura Kirk, PA-CSan Francisco, CA 941151003814989
- Brent Price, P.A.-C.San Francisco, CA 941151548308752
- Elizabeth Price, PASan Francisco, CA 941151669687687
- James Row, NP,PA-CSan Francisco, CA 941151760565691
- Jessica Stark, PA-CSan Francisco, CA 941151215117643
Common questions
What is Stephanie Messina, PA's NPI number?
Stephanie Messina, PA's National Provider Identifier (NPI) is 1912202987, issued on Jan 21, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Stephanie Messina, PA located?
The NPPES record lists a practice address at 2340 Clay St FL 6, San Francisco, CA, 94115. Phone: (424) 444-7399. Providers update this record themselves, so call before visiting.
How can I verify Stephanie Messina, PA's license?
NPPES lists California license number PA21409, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Stephanie Messina, PA prescribe under Medicare Part D?
In 2024, Stephanie Messina, PA had 1,356 Medicare Part D claims for 195 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.