NPPES file of Aug 9, 2026

George S. Lakner, M.D.

Geriatric Psychiatry Physician · Rancho Cucamonga, CA

George S. Lakner, M.D. is a geriatric psychiatry physician with a practice address in Rancho Cucamonga, California, and NPI 1265568844, issued on Feb 26, 2007. Check the license on the Medical Board of California; the Medicare figures below come from public CMS files.

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

NPPES recordNPPES file of Aug 9, 2026
1265568844
Name
George S. Lakner
Credential
M.D.
Primary taxonomy
Geriatric Psychiatry Physician 2084P0805X
License number
50841 MA
Self-reported in NPPES; status is on the state search
Practice location
9377 Haven Ave Ste 100, Rancho Cucamonga, CA 91730
Phone
(909) 906-0535
Enumerated
Feb 26, 2007
Record last updated
Mar 24, 2021 (not updated in 5 years: call before relying on the address or phone)
Fax
(909) 906-1505
Medicare enrollment
Enrolled (PECOS I20210712000904); 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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8 nearest geriatric psychiatry physician records → All 87 in California → Look up another NPI →

Also registered at 9377 Haven Ave Ste 100

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

  1. Dejaney ConwayBehavior Technician1649987884
  2. Ronald Frank, DHMHomeopath1649930546
  3. Antoinette HarrisBehavior Technician1922795673
  4. Kattya LowPhysician Assistant1083211197
  5. Roula LuftiBehavior Technician1669242806
  6. Colin MahlerMental Health Counselor1194455154

Verify George S. Lakner in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of CaliforniaCheck 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

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Gregor Medical CorporationRancho Cucamonga, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

George S. Lakner among 87 geriatric psychiatry physician records in California

George S. Lakner, M.D. is one of 87 geriatric psychiatry physician records with a practice address in California. 61% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 55% of them.

  • NPI issued2007 · 55% of these records are older, 30% newer
  • In a Medicare fileYes · 61% of these records are
  • In the CMS Doctors and Clinicians fileYes · 36% of these records are
  • Graduated1965 · median 2000 among the 31 with a school on file
  • Record last updated2021 · 63% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0805X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Geriatric Psychiatry Physician providers in California

There are 87 geriatric psychiatry physician records in California.

All 87 in California → Every provider in Rancho Cucamonga → Geriatric Psychiatry Physician nationwide →

The 8 geriatric psychiatry physician records with the nearest ZIP codes

  1. Howard Nguyen, DOBaldwin Park, CA 917061558896381
  2. Patricia Gilbert, MDEl Cajon, CA 920211134160203
  3. Michael Newhouse, M.D.Escondido, CA 920251932131224
  4. Enid Rockwell, M.D.La Jolla, CA 920371386669695
  5. Sarah Brunelle, M.D.La Jolla, CA 920931467730812
  6. Indumathi Raghavan, M.D.Thousand Oaks, CA 913601851516934
  7. Kavita Barron, MDSan Diego, CA 921031821418542
  8. Beverly Chang, MDSan Diego, CA 921031063716009

Common questions

What is George S. Lakner, M.D.'s NPI number?

George S. Lakner, M.D.'s National Provider Identifier (NPI) is 1265568844, issued on Feb 26, 2007. An NPI identifies a provider in billing; it is not a license.

Where is George S. Lakner, M.D. located?

The NPPES record lists a practice address at 9377 Haven Ave Ste 100, Rancho Cucamonga, CA, 91730. Phone: (909) 906-0535. Providers update this record themselves, so call before visiting.

How can I verify George S. Lakner, M.D.'s license?

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.

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.