NPPES file of Aug 9, 2026

Merlyn M. Asuncion, M.D.

Geriatric Medicine (Internal Medicine) Physician · Van Nuys, CA

Merlyn M. Asuncion, M.D. is a geriatric medicine (internal medicine) physician with a practice address in Van Nuys, California, and NPI 1679656193, issued on Oct 21, 2006. Check the license (California A49850, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1679656193
Name
Merlyn M. Asuncion
Credential
M.D.
Primary taxonomy
Geriatric Medicine (Internal Medicine) Physician 207RG0300X
License number
A49850 CA
Self-reported in NPPES; status is on the state search
Practice location
14555 Hamlin St, Van Nuys, CA 91411
Phone
(818) 781-2796
Enumerated
Oct 21, 2006
Record last updated
Jun 3, 2010 (not updated in 16 years: call before relying on the address or phone)
Fax
(818) 781-2797
Medicaid ID
00A498501/6447926 CA
Medicare enrollment
Enrolled (PECOS I20070402000433); accepts Medicare assignment
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Verify Merlyn M. Asuncion in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A49850    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

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32% more Medicare Part D claims than the average geriatric medicine (internal medicine) physician in 2024

5,589 Medicare Part D claims for 438 beneficiaries, against an average of 4,246 among the 3,116 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 83 claims were for opioids.

  1. Merlyn Asuncion5,589
  2. Specialty average4,246

Most prescribed

  1. Atorvastatin Calcium470 claims
  2. Amlodipine Besylate402 claims
  3. Metformin Hcl277 claims
  4. Losartan Potassium205 claims
  5. Albuterol Sulfate Hfa155 claims
  6. Omeprazole136 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Industry payments in 2024: $44.03

2 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 1,004 providers of this specialty with any payment received $1,720.82 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Merlyn Asuncion$44.03
  2. Specialty average$1,720.82

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Geriatric Medicine (Internal Medicine) Physician providers in California

There are 532 geriatric medicine (internal medicine) physician records in California.

All 532 in California → Every provider in Van Nuys →

Other geriatric medicine (internal medicine) physician records in California

  1. Adil Abbasi, M.D.La Jolla, CA1548261316
  2. Shashidar Acharya, M.D.Orange, CA1770685521
  3. Marie AdachiLos Angeles, CA1629496740
  4. Pouya Afshar, M.D.San Diego, CA1184958977
  5. Parag Agnihotri, M.D.San Diego, CA1447351085
  6. Andreas Ahlas, M.D.Bakersfield, CA1326200833
  7. Waseem Ahmed, MDSanta Rosa, CA1386803559
  8. Paul AisenSan Diego, CA1669470753
  9. Mahmuda Alam, M.D.Glendale, CA1568659985
  10. Cathy Alessi, M.D.North Hills, CA1134224983

Common questions

What is Merlyn M. Asuncion, M.D.'s NPI number?

Merlyn M. Asuncion, M.D.'s National Provider Identifier (NPI) is 1679656193, issued on Oct 21, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Merlyn M. Asuncion, M.D. located?

The NPPES record lists a practice address at 14555 Hamlin St, Van Nuys, CA, 91411. Phone: (818) 781-2796. Providers update this record themselves, so call before visiting.

How can I verify Merlyn M. Asuncion, M.D.'s license?

NPPES lists California license number A49850, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Merlyn M. Asuncion, M.D. prescribe under Medicare Part D?

In 2024, Merlyn M. Asuncion, M.D. had 5,589 Medicare Part D claims for 438 beneficiaries; the average among geriatric medicine (internal medicine) physician prescribers was 4,246. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.