NPPES file of Aug 9, 2026

Viken S. Melkonian, M.D.

Specialist · Mission Viejo, CA

Viken S. Melkonian, M.D. is a specialist with a practice address in Mission Viejo, California, and NPI 1932154721, issued on May 23, 2006. Check the license (California A37783, as entered in NPPES) with the California board that licenses this profession; 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
1932154721
Name
Viken S. Melkonian
Credential
M.D.
Primary taxonomy
Specialist 174400000X
License number
A37783 CA
Self-reported in NPPES; status is on the state search
Practice location
26691 Plaza, Mission Viejo, CA 92691
Phone
(949) 364-5514
Enumerated
May 23, 2006
Record last updated
Apr 5, 2013 (not updated in 13 years: call before relying on the address or phone)
Fax
(949) 380-6301
Medicaid ID
00A377830 CA
Medicare enrollment
Enrolled (PECOS I20120511000265); accepts Medicare assignment
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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Also registered at 26691 Plaza

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Rachel BunettaPhysical Therapy Assistant1366144354
  2. Arpi MelkonianPsychologist1952489155
  3. George Miranda, MDHematology & Oncology Physician1558545038
  4. Lloyd Nagasawa, M.D.Hematology & Oncology Physician1487647335
  5. Fred Nour, MDNeurology Physician1881629350
  6. Hamid Salehi, MDNeurology Physician1992733257

Verify Viken S. Melkonian in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license A37783    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
Find the California license search

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93% fewer Medicare Part D claims than the average specialist in 2024

99 Medicare Part D claims for 15 beneficiaries, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims.

  1. Viken Melkonian99
  2. Specialty average1,380

Most prescribed

  1. Estradiol20 claims
  2. Intrarosa13 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: $243.26

2 payments; by number, the most common kind was food and beverage; the largest payer was Mayne Pharma Commercial LLC. The 5,844 providers of this specialty with any payment received $4,760.79 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Viken Melkonian$243.26
  2. Specialty average$4,760.79

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

Specialist providers in California

There are 5,749 specialist records in California.

All 5,749 in California → Every provider in Mission Viejo →

Other specialist records in California

  1. Fatemeh Abbasi, PTVan Nuys, CA1558496760
  2. Erlinda Abcede, M.D.Cudahy, CA1831228675
  3. Maher Abdallah, M.D.Palm Springs, CA1205988011
  4. Farinaz AbdiSan Marcos, CA1063153963
  5. Mai Abe, LESanta Monica, CA1609405158
  6. Hamid Abedi, HEARING AID SPECIALISan Diego, CA1659410744
  7. Jonas AbellaSan Francisco, CA1679760938
  8. Shreedhar Abhyankar, M.D.Indio, CA1861530669
  9. Elaine AbichRiverside, CA1780458927
  10. Mussarat Abidi, MDLadera Ranch, CA1053307769

Common questions

What is Viken S. Melkonian, M.D.'s NPI number?

Viken S. Melkonian, M.D.'s National Provider Identifier (NPI) is 1932154721, issued on May 23, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Viken S. Melkonian, M.D. located?

The NPPES record lists a practice address at 26691 Plaza, Mission Viejo, CA, 92691. Phone: (949) 364-5514. Providers update this record themselves, so call before visiting.

How can I verify Viken S. Melkonian, M.D.'s license?

NPPES lists California license number A37783, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.

How much does Viken S. Melkonian, M.D. prescribe under Medicare Part D?

In 2024, Viken S. Melkonian, M.D. had 99 Medicare Part D claims for 15 beneficiaries; the average among specialist prescribers was 1,380. 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.