Douglas Martin Siegmund, FNP-C
Family Nurse Practitioner · Santa Ana, CA
Douglas Martin Siegmund, FNP-C is a family nurse practitioner with a practice address in Santa Ana, California, and NPI 1437837879, issued on Jul 6, 2023. Check the license (California 95025832, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Douglas Martin Siegmund
- Credential
- FNP-C
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License numbers
- 95025832 CA
95128967 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2010 E 1St St Ste 100, Santa Ana, CA 92705
- Phone
- (714) 556-7246
- Enumerated
- Jul 6, 2023
- Record last updated
- May 7, 2025
- Medicare enrollment
- Enrolled (PECOS I20241226001554); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 2010 E 1St St Ste 100
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Nhu Pham, FNPNurse Practitioner1912511718
- Kaloni Sam, FNP-BCFamily Nurse Practitioner1306681929
- Anissa Spada, NURSE PRACTITIONERAcute Care Nurse Practitioner1114469111
Verify Douglas Martin Siegmund in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 95025832Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
72% fewer Medicare Part D claims than the average family nurse practitioner in 2024
369 Medicare Part D claims for 238 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D.
Most prescribed
- Methylprednisolone56 claims
- Mupirocin29 claims
- Amoxicillin-Clavulanate Potass26 claims
- Azithromycin25 claims
- Sulfamethoxazole-Trimethoprim25 claims
- Nitrofurantoin Mono-Macro23 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: $163.11
2 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Pharmaceuticals, Inc. 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
- Coastal Family Medicine IncCosta Mesa, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
113 family nurse practitioner records list a practice address in Santa Ana
They are 113 of the 8,904 NPPES records with a practice address in Santa Ana, and 16,966 family nurse practitioner records in California.
All 113 in Santa Ana → All 16,966 in California → Every provider in Santa Ana →
Other family nurse practitioner records in California
- Danielle Aaroe, FAMILY NURSE PRACTITOroville, CA1750767083
- Joshua AaronMission Hills, CA1477291805
- Orly Aaron, NPSan Francisco, CA1376912451
- Paris Gilbert Russ AaronSacramento, CA1871079111
- Tiffanne Aaronsen, FNPIndio, CA1568191807
- Alvin Joseph Abad, FNP-CSan Francisco, CA1154919306
- Frances Abad, FNPLos Angeles, CA1053504514
- Nnenna AbaezeLong Beach, CA1457820763
- Raymond Abagat, FNPTorrance, CA1306685821
- Ashley AbalCastaic, CA1740140698
Common questions
What is Douglas Martin Siegmund, FNP-C's NPI number?
Douglas Martin Siegmund, FNP-C's National Provider Identifier (NPI) is 1437837879, issued on Jul 6, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Douglas Martin Siegmund, FNP-C located?
The NPPES record lists a practice address at 2010 E 1St St Ste 100, Santa Ana, CA, 92705. Phone: (714) 556-7246. Providers update this record themselves, so call before visiting.
How can I verify Douglas Martin Siegmund, FNP-C's license?
NPPES lists California license number 95025832, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Douglas Martin Siegmund, FNP-C prescribe under Medicare Part D?
In 2024, Douglas Martin Siegmund, FNP-C had 369 Medicare Part D claims for 238 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.