NPPES file of Aug 9, 2026

Louis P. Kartsonis, M.D.

Ophthalmology Physician · San Diego, CA

Louis P. Kartsonis, M.D. is an ophthalmology physician with a practice address in San Diego, California, and NPI 1285637702, issued on May 30, 2005. Check the license (California G37754, 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
1285637702
Name
Louis P. Kartsonis
Credential
M.D.
Primary taxonomy
Ophthalmology Physician 207W00000X
License number
G37754 CA
Self-reported in NPPES; status is on the state search
Practice location
4747 Mission Blvd, San Diego, CA 92109
Phone
(858) 581-3838
Enumerated
May 30, 2005
Record last updated
Feb 23, 2010 (not updated in 16 years: call before relying on the address or phone)
Fax
(858) 581-3333
Medicaid ID
00G377540 CA
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Also registered at 4747 Mission Blvd

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

  1. Janelle Bacino, D.D.S.General Practice Dentistry1558587857
  2. Robert Buechel, D.C.Chiropractor1518067610
  3. Mary Duvall, D.P.T.Physical Therapist1013159805
  4. Donna Franco, L.ACAcupuncturist1356664403
  5. Anna Grant, PT, DPT, OCSPhysical Therapist1730743576
  6. Meghan Griffin, L.AC.Acupuncturist1639446248

Verify Louis P. Kartsonis in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G37754    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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92% fewer Medicare Part D claims than the average ophthalmology physician in 2024

125 Medicare Part D claims for 24 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 42% of claims.

  1. Louis Kartsonis125
  2. Specialty average1,518

Most prescribed

  1. Latanoprost37 claims
  2. Brimonidine Tartrate20 claims
  3. Dorzolamide Hcl16 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.

Ophthalmology Physician providers in California

There are 2,899 ophthalmology physician records in California.

All 2,899 in California → Every provider in San Diego →

Other ophthalmology physician records in California

  1. Sam Abbassi, MD, MSWest Hills, CA1881937720
  2. Richard Abbott, M.D.San Francisco, CA1346276573
  3. Jean-Paul Abboud, M.D., PH.D.Del Mar, CA1760776728
  4. Nizar Abdelfattah, MDPasadena, CA1801359393
  5. Parastou Abedi, MDAliso Viejo, CA1720067333
  6. Shahla Abedi, MDAliso Viejo, CA1467431072
  7. Lilit Ablabutyan, M.D.Glendale, CA1497013064
  8. Nathan Abraham, M.D.Valencia, CA1306224456
  9. James Abrams, M.D.San Bruno, CA1912903329
  10. Adam Abroms, MDWestlake Village, CA1497743702

Common questions

What is Louis P. Kartsonis, M.D.'s NPI number?

Louis P. Kartsonis, M.D.'s National Provider Identifier (NPI) is 1285637702, issued on May 30, 2005. An NPI identifies a provider in billing; it is not a license.

Where is Louis P. Kartsonis, M.D. located?

The NPPES record lists a practice address at 4747 Mission Blvd, San Diego, CA, 92109. Phone: (858) 581-3838. Providers update this record themselves, so call before visiting.

How can I verify Louis P. Kartsonis, M.D.'s license?

NPPES lists California license number G37754, 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 Louis P. Kartsonis, M.D. prescribe under Medicare Part D?

In 2024, Louis P. Kartsonis, M.D. had 125 Medicare Part D claims for 24 beneficiaries; the average among ophthalmology physician prescribers was 1,518. 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.