NPPES file of Aug 9, 2026

George L. Schiffman, M.D.

Sleep Medicine (Internal Medicine) Physician · Mission Viejo, CA

George L. Schiffman, M.D. is a sleep medicine (internal medicine) physician with a practice address in Mission Viejo, California, and NPI 1104803188, issued on Dec 29, 2005. Check the license (California G50558, 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
1104803188
Name
George L. Schiffman
Credential
M.D.
Primary taxonomy
Sleep Medicine (Internal Medicine) Physician 207RS0012X
License number
G50558 CA
Self-reported in NPPES; status is on the state search
Practice location
26800 Crown Valley Pkwy Ste 205, Mission Viejo, CA 92691
Phone
(949) 364-3330
Enumerated
Dec 29, 2005
Record last updated
Sep 26, 2023
Fax
(949) 364-2886
Medicaid ID
00G505580 CA
Medicare enrollment
Enrolled (PECOS I20081215000027); accepts Medicare assignment
Medical or professional school
Rush Medical College Of Rush University, 1982
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 sleep medicine (internal medicine) physician records → All 129 in California → Look up another NPI →

Also registered at 26800 Crown Valley Pkwy Ste 205

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

  1. Lauryn Brink, NPAcute Care Nurse Practitioner1275937989
  2. Gisele Kabbach, MDPulmonary Disease Physician1255795076
  3. Kathryn Kennedy, PA-CPhysician Assistant1952052433
  4. Daniel Ponticiello, MDCritical Care Medicine (Internal Medicine) Physician1417185273

Verify George L. Schiffman in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G50558    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

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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36% more Medicare Part D claims than the average sleep medicine (internal medicine) physician in 2024

794 Medicare Part D claims for 114 beneficiaries, against an average of 585 among the 852 providers of this specialty who prescribed in Part D. Brand-name drugs were 49% of claims.

  1. George Schiffman794
  2. Specialty average585

Most prescribed

  1. Albuterol Sulfate Hfa108 claims
  2. Montelukast Sodium99 claims
  3. Breo Ellipta57 claims
  4. Trelegy Ellipta47 claims
  5. Fluticasone-Salmeterol37 claims
  6. Prednisone31 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: $636.93

21 payments; by number, the most common kind was food and beverage; the largest payer was Harmony Biosciences LLC. The 664 providers of this specialty with any payment received $3,724.37 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. George Schiffman$636.93
  2. Specialty average$3,724.37

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

Bills Medicare through one group practice

  1. Providence Medical FoundationFullerton, CA

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

George L. Schiffman among 129 sleep medicine (internal medicine) physician records in California

George L. Schiffman, M.D. is one of 129 sleep medicine (internal medicine) physician records with a practice address in California. 95% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.

  • NPI issued2005 · 0% of these records are older, 95% newer
  • In a Medicare fileYes · 95% of these records are
  • In the CMS Doctors and Clinicians fileYes · 82% of these records are
  • Graduated1982 · median 2006 among the 106 with a school on file
  • Record last updated2023 · 35% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RS0012X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Sleep Medicine (Internal Medicine) Physician providers in California

There are 129 sleep medicine (internal medicine) physician records in California.

All 129 in California → Every provider in Mission Viejo → Sleep Medicine (Internal Medicine) Physician nationwide →

The 8 sleep medicine (internal medicine) physician records with the nearest ZIP codes

  1. Bruce Tammelin, M.D.Newport Beach, CA 926631942288709
  2. Robert Lebby, MDAliso Viejo, CA 926561457344129
  3. Sahil Chopra, MDIrvine, CA 926181245545326
  4. Stacey Gunn, M.D.Irvine, CA 926181710206503
  5. Wesley Fleming, MDIrvine, CA 926041205922945
  6. Rajanigandha Dhokarh, M.DWildomar, CA 925951144417130
  7. Delmer Henninger, MDMurrieta, CA 925631942394390
  8. Peter Fotinakes, M.D.Orange, CA 928681679542518

Common questions

What is George L. Schiffman, M.D.'s NPI number?

George L. Schiffman, M.D.'s National Provider Identifier (NPI) is 1104803188, issued on Dec 29, 2005. An NPI identifies a provider in billing; it is not a license.

Where is George L. Schiffman, M.D. located?

The NPPES record lists a practice address at 26800 Crown Valley Pkwy Ste 205, Mission Viejo, CA, 92691. Phone: (949) 364-3330. Providers update this record themselves, so call before visiting.

How can I verify George L. Schiffman, M.D.'s license?

NPPES lists California license number G50558, 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 George L. Schiffman, M.D. prescribe under Medicare Part D?

In 2024, George L. Schiffman, M.D. had 794 Medicare Part D claims for 114 beneficiaries; the average among sleep medicine (internal medicine) physician prescribers was 585. 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.