Siamak Abai, D.D.S., M.MED.SC.
NPI 1699923375 · Prosthodontics · Tustin, CA
Siamak Abai, D.D.S., M.MED.SC. is a Prosthodontics provider in Tustin, CA (NPI 1699923375).
Provider details
- NPI number
- 1699923375
- Entity type
- Individual
- Primary specialty
- ProsthodonticsDental Providers
- Credential
- D.D.S., M.MED.SC.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 54930 (CA)
Specialties & taxonomies
Dental Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
17 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 2 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amoxicillin | 85 | 79 |
| Ibuprofen | 78 | 72 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$84 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
Registry dates
- Enumerated
- 2008-09-05
- Last updated
- 2020-12-01
- Certified
- 2020-12-01
Frequently asked questions
- What is Siamak Abai's NPI number?
- Siamak Abai's National Provider Identifier (NPI) is 1699923375, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Siamak Abai's specialty?
- Siamak Abai is listed in the NPPES registry with a primary specialty of Prosthodontics (Dental Providers).
- Where is Siamak Abai located?
- Siamak Abai's practice location on file with NPPES is 1431 Warner Ave Ste E, Tustin, CA 92780-6444.
- What is Siamak Abai's phone number?
- The practice phone number listed in the NPPES registry for Siamak Abai is (949) 648-0303.
- Is Siamak Abai's NPI active?
- Yes — Siamak Abai's NPI (1699923375) is active in the NPPES registry as of the last update on 2020-12-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.