Allison Leong, M.D.
NPI 1952440562 · Obstetrics & Gynecology Physician · Santa Monica, CA
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Allison Leong, M.D. is a Obstetrics & Gynecology Physician provider in Santa Monica, CA (NPI 1952440562).
Provider details
- NPI number
- 1952440562
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- G48658 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
618 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 426 | $173 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 66 | $88 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 44 | $210 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 33 | $123 |
| Office Or Other Outpatient Visit for the Evaluation and Management of Established Patient That May Not Require Presence of Healthcare Professional99211 | 22 | $23 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Estradiol | 291 | 105 |
| Progesterone, Micronizedbrand: Progesterone | 177 | 56 |
| Estradiolbrand: Estradiol (twice Weekly) | 134 | 35 |
| Estradiolbrand: Yuvafem | 67 | 20 |
| Estradiol/Norethindrone Acetbrand: Estradiol-Norethindrone Acetat | 55 | 12 |
| Valacyclovir Hclbrand: Valacyclovir | 50 | 16 |
| Estrogens, Conjugatedbrand: Premarin |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$271 across 8 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
Registry dates
- Enumerated
- 2007-02-06
- Last updated
- 2007-07-08
Frequently asked questions
- What is Allison Leong's NPI number?
- Allison Leong's National Provider Identifier (NPI) is 1952440562, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Allison Leong's specialty?
- Allison Leong is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is Allison Leong located?
- Allison Leong's practice location on file with NPPES is 2121 Wilshire Blvd, Santa Monica, CA 90403-5720.
- What is Allison Leong's phone number?
- The practice phone number listed in the NPPES registry for Allison Leong is (310) 264-1777.
- Does Allison Leong accept Medicare?
- Allison Leong is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Allison Leong's NPI active?
- Yes — Allison Leong's NPI (1952440562) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.