Diana Yao, M.D.
NPI 1588678833 · Specialist · Long Beach, CA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Diana Yao, M.D. is a Specialist provider in Long Beach, CA (NPI 1588678833).
Provider details
- NPI number
- 1588678833
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- G73884 (CA)
Specialties & taxonomies
Other Service Providers
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
726 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 155 | $92 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 141 | $137 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 105 | $101 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 83 | $174 |
| Colorectal Cancer Screening; Colonoscopy on Individual at High RiskG0105 | 65 | $189 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 204 | 86 |
| Famotidine | 118 | 39 |
| Pantoprazole Sodium | 75 | 28 |
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 44 | 44 |
| Linaclotidebrand: Linzess | 30 | — |
| Sucralfate | 21 | — |
| Lansoprazole | 20 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,511 across 55 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
- 2006-07-29
- Last updated
- 2022-01-10
- Certified
- 2022-01-10
Frequently asked questions
- What is Diana Yao's NPI number?
- Diana Yao's National Provider Identifier (NPI) is 1588678833, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diana Yao's specialty?
- Diana Yao is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Diana Yao located?
- Diana Yao's practice location on file with NPPES is 3833 Worsham Avenue, Long Beach, CA 90808-1766.
- What is Diana Yao's phone number?
- The practice phone number listed in the NPPES registry for Diana Yao is (562) 595-5421.
- Does Diana Yao accept Medicare?
- Diana Yao is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Diana Yao's NPI active?
- Yes — Diana Yao's NPI (1588678833) is active in the NPPES registry as of the last update on 2022-01-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.