Heather Seierstad, NP
Family Nurse Practitioner · San Marcos, CA
Heather Seierstad, NP is a family nurse practitioner with a practice address in San Marcos, California, and NPI 1356060172, issued on Aug 24, 2022. Check the license (California 95022361, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Heather Seierstad
- Credential
- NP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- 95022361 CA
Self-reported in NPPES; status is on the state search - Practice location
- 417 E Carmel St Ste 200, San Marcos, CA 92078
- Phone
- (345) 326-7858
- Enumerated
- Aug 24, 2022
- Record last updated
- Aug 24, 2022
- Medicare enrollment
- Enrolled (PECOS I20250714003462); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 16,966 in California → Look up another NPI →
Verify Heather Seierstad in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 95022361Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.1 times the Medicare Part D claims of the average family nurse practitioner in 2024
5,347 Medicare Part D claims for 244 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims. 92 claims were for opioids.
Most prescribed
- Atorvastatin Calcium262 claims
- Metformin Hcl210 claims
- Levothyroxine Sodium203 claims
- Amlodipine Besylate191 claims
- Gabapentin183 claims
- Losartan Potassium168 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: $267.46
2 payments; by number, the most common kind was food and beverage; the largest payer was Abiomed. The 99,489 providers of this specialty with any payment received $650.95 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.
Bills Medicare through one group practice
- Ascension Medical Group-Southeast Wisconsin IncRacine, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Heather Seierstad among 16,966 family nurse practitioner records in California
Heather Seierstad, NP is one of 16,966 family nurse practitioner records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 68% of them.
- NPI issued2022 · 68% of these records are older, 25% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 40% of these records are
- Graduated2022 · median 2019 among the 6,793 with a school on file
- Record last updated2022 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
45 family nurse practitioner records list a practice address in San Marcos
They are 45 of the 1,985 NPPES records with a practice address in San Marcos, and 16,966 family nurse practitioner records in California.
All 16,966 in California → Every provider in San Marcos → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Loribette Antonio, F.N.P.San Marcos, CA 920781467882910
- Cecily Arenas, FNPSan Marcos, CA 920781700031507
- Shannon Baker, FNPSan Marcos, CA 920781518191014
- Caitlin Brickman, NP-CSan Marcos, CA 920781902188303
- Jackie Do, FNPSan Marcos, CA 920781356925283
- Jill Elsdon, FNPSan Marcos, CA 920781346327020
- Natassia Francis, FNP, MSN, RN, PHNSan Marcos, CA 920781407547318
- Kelly Halloran, MN,RNC,FNP,DNCSan Marcos, CA 920781851418206
Common questions
What is Heather Seierstad, NP's NPI number?
Heather Seierstad, NP's National Provider Identifier (NPI) is 1356060172, issued on Aug 24, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Heather Seierstad, NP located?
The NPPES record lists a practice address at 417 E Carmel St Ste 200, San Marcos, CA, 92078. Phone: (345) 326-7858. Providers update this record themselves, so call before visiting.
How can I verify Heather Seierstad, NP's license?
NPPES lists California license number 95022361, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Heather Seierstad, NP prescribe under Medicare Part D?
In 2024, Heather Seierstad, NP had 5,347 Medicare Part D claims for 244 beneficiaries; the average among family nurse practitioner prescribers was 1,305. 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.