NPPES file of Aug 9, 2026

Nader A. Nassif, M.D.

Adult Reconstructive Orthopaedic Surgery Physician · Newport Beach, CA

Nader A. Nassif, M.D. is an adult reconstructive orthopaedic surgery physician with a practice address in Newport Beach, California, and NPI 1629262183, issued on Aug 28, 2007. Check the license (California A125009, 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 2023 and 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1629262183
Name
Nader A. Nassif
Credential
M.D.
Primary taxonomy
Adult Reconstructive Orthopaedic Surgery Physician 207XS0114X
License numbers
A125009 CA
2006023684 MO
260892-1 NY
Self-reported in NPPES; status is on the state search
Practice location
22 Corporate Plaza Dr, Newport Beach, CA 92660
Phone
(949) 722-7038
Enumerated
Aug 28, 2007
Record last updated
Feb 17, 2020 (not updated in 6 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20130729000694); accepts Medicare assignment
Medical or professional school
Harvard Medical School, 2006
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 22 Corporate Plaza Dr

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

  1. Zachary Adler, MDOrthopaedic Surgery Physician1396884391
  2. Joyce Anderson, R.N.F.A.Registered Nurse First Assistant1952630006
  3. Justin Anderson, PA-CSurgical Physician Assistant1487924007
  4. Nicholas Bacher, MDPain Medicine (Anesthesiology) Physician1972130771
  5. Dennis Bansil, PA-CPhysician Assistant1740629047
  6. Lindsay Baumhefner, PA-CMedical Physician Assistant1043398977

Verify Nader A. Nassif in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A125009
    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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12% more Medicare Part D claims than the average adult reconstructive orthopaedic surgery physician in 2024

649 Medicare Part D claims for 380 beneficiaries, against an average of 579 among the 1,112 providers of this specialty who prescribed in Part D. 103 claims were for opioids.

  1. Nader Nassif649
  2. Specialty average579

Most prescribed

  1. Meloxicam210 claims
  2. Amoxicillin172 claims
  3. Tramadol Hcl65 claims
  4. Methocarbamol46 claims
  5. Oxycodone Hcl31 claims
  6. Clindamycin Hcl24 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.

The practice group's MIPS final score for 2023 (Medicare payment program): 83.6 of 100

The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.

  1. Qualityout of 100 · 30% of the final score95.0
  2. Costout of 100 · 30%54.7
  3. Promoting interoperabilitynot scored (reweighted)
  4. Improvement activities40 of 40 points · 15%100.0

Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).

Industry payments in 2024: $44,849.59

43 payments; by number, the most common kind was food and beverage; the largest payer was DePuy Synthes Products, Inc. The 1,060 providers of this specialty with any payment received $68,015.27 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Nader Nassif$44,850
  2. Specialty average$68,015

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. Orthopedic Institute OF Newport Beach Limited PartnershipIrvine, CA

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

Nader A. Nassif among 147 adult reconstructive orthopaedic surgery physician records in California

Nader A. Nassif, M.D. is one of 147 adult reconstructive orthopaedic surgery physician records with a practice address in California. 88% 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 32% of them.

  • NPI issued2007 · 32% of these records are older, 54% newer
  • In a Medicare fileYes · 88% of these records are
  • In the CMS Doctors and Clinicians fileYes · 76% of these records are
  • Graduated2006 · median 2009 among the 112 with a school on file
  • Record last updated2020 · 47% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207XS0114X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Adult Reconstructive Orthopaedic Surgery Physician providers in California

There are 147 adult reconstructive orthopaedic surgery physician records in California.

The 8 adult reconstructive orthopaedic surgery physician records with the nearest ZIP codes

  1. James Caillouette, M.D.Newport Beach, CA 926601467489492
  2. Steven Gausewitz, M.D.Newport Beach, CA 926601215979695
  3. Matthew Siljander, MDNewport Beach, CA 926601831509355
  4. Larry Gersten, M.D.Laguna Woods, CA 926371417950064
  5. Abraham Kim, M.D.Laguna Woods, CA 926371902123789
  6. Robert Montgomery, M.D.Laguna Woods, CA 926371952304594
  7. Gilbert Roc, M.D.Laguna Woods, CA 926371104147172
  8. James Chen, M.D.Mission Viejo, CA 926911104210152

Common questions

What is Nader A. Nassif, M.D.'s NPI number?

Nader A. Nassif, M.D.'s National Provider Identifier (NPI) is 1629262183, issued on Aug 28, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Nader A. Nassif, M.D. located?

The NPPES record lists a practice address at 22 Corporate Plaza Dr, Newport Beach, CA, 92660. Phone: (949) 722-7038. Providers update this record themselves, so call before visiting.

How can I verify Nader A. Nassif, M.D.'s license?

NPPES lists California license number A125009, 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 Nader A. Nassif, M.D. prescribe under Medicare Part D?

In 2024, Nader A. Nassif, M.D. had 649 Medicare Part D claims for 380 beneficiaries; the average among adult reconstructive orthopaedic surgery physician prescribers was 579. Part D covers Medicare prescriptions only.

What is Nader A. Nassif, M.D.'s MIPS final score?

The 2023 MIPS final score is 83.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.

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.

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.