Allison Saiz, MD
NPI 1174910657 · Gynecologic Oncology Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Gynecological Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Allison Saiz, MD is a Gynecologic Oncology Physician provider in Chicago, IL (NPI 1174910657).
Provider details
- NPI number
- 1174910657
- Entity type
- Individual
- Primary specialty
- Gynecologic Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
11 yrs in NPPES registry
- Profile completeness33% of score
83% of core fields populated
- Practice footprint20% of score
2 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 3 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Oxycodone Hcl | 48 | 45 |
| Ondansetronbrand: Ondansetron Odt | 40 | 39 |
| Ibuprofen | 38 | 38 |
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.
$164 across 2 records (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 (1)
- 4860 Y St Ste 2500Sacramento, CA 95817-2307Phone: (916) 734-6900
Registry dates
- Enumerated
- 2015-04-22
- Last updated
- 2022-12-07
- Certified
- 2022-12-07
Frequently asked questions
- What is Allison Saiz's NPI number?
- Allison Saiz's National Provider Identifier (NPI) is 1174910657, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Allison Saiz's specialty?
- Allison Saiz is listed in the NPPES registry with a primary specialty of Gynecologic Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Allison Saiz located?
- Allison Saiz's practice location on file with NPPES is 250 E Superior St Ste 5-2175, Chicago, IL 60611-2914.
- What is Allison Saiz's phone number?
- The practice phone number listed in the NPPES registry for Allison Saiz is (312) 472-3970.
- Does Allison Saiz accept Medicare?
- Allison Saiz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Allison Saiz's NPI active?
- Yes — Allison Saiz's NPI (1174910657) is active in the NPPES registry as of the last update on 2022-12-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.