Paul Ziesmer, MD
NPI 1649202714 · Emergency Medicine Physician · Orange, CA
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Paul Ziesmer, MD is a Emergency Medicine Physician provider in Orange, CA (NPI 1649202714).
Provider details
- NPI number
- 1649202714
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G52989 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
4 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$39 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (3)
- 2251 N Harbor BlvdFullerton, CA 92835-2601Phone: (714) 449-6230
- 2501 E Chapman AveOrange, CA 92869-3204Phone: (714) 633-1011
- 2212 E 4th St Ste 201Santa Ana, CA 92705-3872Phone: (714) 288-3230Fax: (714) 744-5294
Registry dates
- Enumerated
- 2006-07-07
- Last updated
- 2020-10-26
- Certified
- 2020-10-26
Frequently asked questions
- What is Paul Ziesmer's NPI number?
- Paul Ziesmer's National Provider Identifier (NPI) is 1649202714, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Paul Ziesmer's specialty?
- Paul Ziesmer is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Paul Ziesmer located?
- Paul Ziesmer's practice location on file with NPPES is 1100 West Stewart Drive, Orange, CA 92868-3849.
- What is Paul Ziesmer's phone number?
- The practice phone number listed in the NPPES registry for Paul Ziesmer is (714) 633-9111.
- Does Paul Ziesmer accept Medicare?
- Paul Ziesmer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Paul Ziesmer's NPI active?
- Yes — Paul Ziesmer's NPI (1649202714) is active in the NPPES registry as of the last update on 2020-10-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.