Serena Yang-Loudin, MD
NPI 1649613365 · Urology Physician · Stanford, CA
Enrolled with Medicare as Practitioner - Urology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Serena Yang-Loudin, MD is a Urology Physician provider in Stanford, CA (NPI 1649613365).
Provider details
- NPI number
- 1649613365
- Entity type
- Individual
- Primary specialty
- Urology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A156420 (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
13 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,662 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 | 366 | $113 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 338 | $157 |
| Ultrasound Measurement of Bladder Capacity After Voiding51798 | 237 | $16 |
| Urinalysis, Manual Test81002 | 231 | $3 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 133 | $203 |
| Diagnostic Exam of Bladder and Urethra Using an Endoscope52000 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 20 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tamsulosin Hcl | 314 | 109 |
| Finasteride | 229 | 77 |
| Vibegronbrand: Gemtesa | 219 | 61 |
| Mirabegronbrand: Myrbetriq | 154 | 36 |
| Methenamine Hippurate | 123 | 41 |
| Estradiol | 98 | 67 |
| Nitrofurantoin Monohyd/M-Crystbrand: Nitrofurantoin Mono-Macro | 96 | 63 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,781 across 62 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)
- 3300 Webster St Ste 710Oakland, CA 94609-3122Phone: (510) 465-5800
Registry dates
- Enumerated
- 2013-04-11
- Last updated
- 2025-09-02
- Certified
- 2025-09-02
Frequently asked questions
- What is Serena Yang-Loudin's NPI number?
- Serena Yang-Loudin's National Provider Identifier (NPI) is 1649613365, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Serena Yang-Loudin's specialty?
- Serena Yang-Loudin is listed in the NPPES registry with a primary specialty of Urology Physician (Allopathic & Osteopathic Physicians).
- Where is Serena Yang-Loudin located?
- Serena Yang-Loudin's practice location on file with NPPES is 300 Pasteur Dr, Stanford, CA 94305-2200.
- What is Serena Yang-Loudin's phone number?
- The practice phone number listed in the NPPES registry for Serena Yang-Loudin is (650) 723-4000.
- Does Serena Yang-Loudin accept Medicare?
- Serena Yang-Loudin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Serena Yang-Loudin's NPI active?
- Yes — Serena Yang-Loudin's NPI (1649613365) is active in the NPPES registry as of the last update on 2025-09-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.