Witmer Neonatology Associates,inc
NPI 1063543627 · Neonatal-Perinatal Medicine Physician · Los Angeles, CA
Witmer Neonatology Associates,inc is a Neonatal-Perinatal Medicine Physician organization in Los Angeles, CA (NPI 1063543627).
Provider details
- NPI number
- 1063543627
- Entity type
- Organization
- Primary specialty
- Neonatal-Perinatal Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Bijan Siassi, Co-Owner(323) 226-3499
- License
- FNP 29985 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-03-07
- Last updated
- 2020-08-22
Frequently asked questions
- What is Witmer Neonatology Associates,inc's NPI number?
- Witmer Neonatology Associates,inc's National Provider Identifier (NPI) is 1063543627, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Witmer Neonatology Associates,inc?
- Witmer Neonatology Associates,inc is classified in the NPPES registry as Neonatal-Perinatal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Witmer Neonatology Associates,inc located?
- Witmer Neonatology Associates,inc's practice location on file with NPPES is 1245 Wilshire Blvd, Los Angeles, CA 90017-4810.
- What is Witmer Neonatology Associates,inc's phone number?
- The practice phone number listed in the NPPES registry for Witmer Neonatology Associates,inc is (213) 977-4123.
- Who is the authorized official for Witmer Neonatology Associates,inc?
- The authorized official listed on Witmer Neonatology Associates,inc's NPPES record is Bijan Siassi, Co-Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Witmer Neonatology Associates,inc's NPI active?
- Yes — Witmer Neonatology Associates,inc's NPI (1063543627) is active in the NPPES registry as of the last update on 2020-08-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.