Melissa Nastacio, PA-C
Medical Physician Assistant · San Francisco, CA
Melissa Nastacio, PA-C is a medical physician assistant with a practice address in San Francisco, California, and NPI 1982113007, issued on Sep 20, 2017. Check the license (California 54679, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Melissa Nastacio
- Credential
- PA-C
- Primary taxonomy
- Medical Physician Assistant 363AM0700X
- License number
- 54679 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2 Embarcadero Ctr Lbby Level, San Francisco, CA 94111
- Phone
- (888) 663-6331
- Enumerated
- Sep 20, 2017
- Record last updated
- Mar 17, 2025
- Fax
- (415) 252-7176
- Entity
- Type 1 · individual
8 nearest medical physician assistant records → All 3,376 in California → Look up another NPI →
Also registered at 2 Embarcadero Ctr Lbby Level
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Susan AdamNurse Practitioner1033530811
- Julie Ahlrich, FNP-BCFamily Nurse Practitioner1780802629
- Ann Ala, NPFamily Nurse Practitioner1083948012
- Jennifer Alexander, FNPFamily Nurse Practitioner1205179249
- Sameerah Ali, FNP-BCNurse Practitioner1558531566
- Amanda Anderson, P.A.Physician Assistant1104292267
Verify Melissa Nastacio in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 54679Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
73% fewer Medicare Part D claims than the average medical physician assistant in 2024
309 Medicare Part D claims for 208 beneficiaries, against an average of 1,148 among the 23,801 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium23 claims
- Lisinopril22 claims
- Amlodipine Besylate17 claims
- Simvastatin13 claims
- Levothyroxine Sodium11 claims
- Losartan Potassium11 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.
Melissa Nastacio among 3,376 medical physician assistant records in California
Melissa Nastacio, PA-C is one of 3,376 medical physician assistant records with a practice address in California. 69% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 69% of them.
- NPI issued2017 · 69% of these records are older, 29% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileNo · 40% of these records are
- Record last updated2025 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363AM0700X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Physician Assistant providers in California
There are 3,376 medical physician assistant records in California.
All 3,376 in California → Every provider in San Francisco → Medical Physician Assistant nationwide →
The 8 medical physician assistant records with the nearest ZIP codes
- Sarah Kaplan, PA-CSan Francisco, CA 941111982796553
- Karen Katon, PA-CSan Francisco, CA 941111891385274
- Alexis Kofoed, PA-CSan Francisco, CA 941111770078479
- Dana Osipower, PA-CSan Francisco, CA 941111659351625
- Robert Ostrowski, PA-CSan Francisco, CA 941111417112103
- Arju Patel, PA-CSan Francisco, CA 941111790013472
- Angelica Rumley, PA-CSan Francisco, CA 941111801234281
- Rachel Segerdahl, M.S., PA-CSan Francisco, CA 941111689953887
Common questions
What is Melissa Nastacio, PA-C's NPI number?
Melissa Nastacio, PA-C's National Provider Identifier (NPI) is 1982113007, issued on Sep 20, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Melissa Nastacio, PA-C located?
The NPPES record lists a practice address at 2 Embarcadero Ctr Lbby Level, San Francisco, CA, 94111. Phone: (888) 663-6331. Providers update this record themselves, so call before visiting.
How can I verify Melissa Nastacio, PA-C's license?
NPPES lists California license number 54679, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Melissa Nastacio, PA-C prescribe under Medicare Part D?
In 2024, Melissa Nastacio, PA-C had 309 Medicare Part D claims for 208 beneficiaries; the average among medical physician assistant prescribers was 1,148. 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.