Merlyn Asuncion, M.D.
NPI 1679656193 · Geriatric Medicine (Internal Medicine) Physician · Van Nuys, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Merlyn Asuncion, M.D. is a Geriatric Medicine (Internal Medicine) Physician provider in Van Nuys, CA (NPI 1679656193).
Provider details
- NPI number
- 1679656193
- Entity type
- Individual
- Primary specialty
- Geriatric Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- A49850 (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
886 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 | 308 | $99 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 130 | $9 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 95 | $10 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 61 | $13 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 60 | $8 |
| Hemoglobin A1c Level83036 | 55 | $10 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 91 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 470 | 169 |
| Amlodipine Besylate | 402 | 142 |
| Metformin Hcl | 277 | 107 |
| Losartan Potassium | 205 | 73 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 155 | 58 |
| Omeprazole | 136 | 53 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$44 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
Registry dates
- Enumerated
- 2006-10-21
- Last updated
- 2010-06-03
Frequently asked questions
- What is Merlyn Asuncion's NPI number?
- Merlyn Asuncion's National Provider Identifier (NPI) is 1679656193, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Merlyn Asuncion's specialty?
- Merlyn Asuncion is listed in the NPPES registry with a primary specialty of Geriatric Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Merlyn Asuncion located?
- Merlyn Asuncion's practice location on file with NPPES is 14555 Hamlin St, Van Nuys, CA 91411-1612.
- What is Merlyn Asuncion's phone number?
- The practice phone number listed in the NPPES registry for Merlyn Asuncion is (818) 781-2796.
- Does Merlyn Asuncion accept Medicare?
- Merlyn Asuncion is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Merlyn Asuncion's NPI active?
- Yes — Merlyn Asuncion's NPI (1679656193) is active in the NPPES registry as of the last update on 2010-06-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.