Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Douglas Martin Siegmund, FNP-C

Individual provider Registered Nurse · NPI 1437837879

Douglas Martin Siegmund, FNP-C is a Nurse Practitioner in Santa Ana, California. Qualified in 2023, 3 years ago. Practices with Coastal Family Medicine Inc, a 35-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
3
Licensed in
CA
In the registry since
2023
Specialties on file
2
What do these letters mean?
FNP-C — Family Nurse Practitioner, Certified
A family nurse practitioner certified by the AANP.

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Practice location Address checks out

2010 E 1st St Ste 100
Santa Ana, CA 92705-4086
Phone: (714) 556-7246
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 660 Baker St Ste A102, Costa Mesa, CA 92626-4407 — (714) 668-2505
  • 4950 Barranca Pkwy Ste 104, Irvine, CA 92604-8644 — (949) 857-1248

Specialties & licences

Family Nurse Practitioner (primary) Taxonomy 363LF0000X · Licence 95025832 (CA)
Registered Nurse Taxonomy 163W00000X · Licence 95128967 (CA)

Record details

NPI number1437837879
Entity typeIndividual (Type 1)
GenderMale
Credentials FNP-C
Sole proprietorNo
NPI enumeratedJuly 6, 2023
Last updated in NPPESMay 7, 2025
Certification dateMay 7, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2023 (3 years in practice)
Group practice Coastal Family Medicine Inc — 35 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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