Allan T. Nassar, MD
Internal Medicine Physician · Madera, CA
Allan T. Nassar, MD is an internal medicine physician with a practice address in Madera, California, and NPI 1033129135, issued on Aug 9, 2006. Check the license (California A61181, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Allan T. Nassar
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A61181 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1111 W 4TH St, Madera, CA 93637
- Phone
- (559) 662-2705
- Enumerated
- Aug 9, 2006
- Record last updated
- Mar 22, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (559) 673-1588
- Medicaid IDs
- GR0068140 CA
LAB13493F CA
1699004044 CA - Medicare enrollment
- Enrolled (PECOS I20081213000121); accepts Medicare assignment
- Medical or professional school
- University Of Kansas School Of Med (Kc/Wich/Sal), 1995
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 1111 W 4TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Allan T. Nassar in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A61181Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
51% more Medicare Part D claims than the average internal medicine physician in 2024
4,786 Medicare Part D claims for 339 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims. 78 claims were for opioids.
Most prescribed
- Atorvastatin Calcium389 claims
- Amlodipine Besylate259 claims
- Hydrochlorothiazide206 claims
- Levothyroxine Sodium188 claims
- Losartan Potassium182 claims
- Carvedilol120 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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $169.37
4 payments; by number, the most common kind was food and beverage; the largest payer was Bayer Healthcare Pharmaceuticals Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Advanced Internal Medicine Associates IncMadera, CA
- Community Health PartnersMadera, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Allan T. Nassar among 17,696 internal medicine physician records in California
Allan T. Nassar, MD is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1995 · median 2004 among the 11,065 with a school on file
- Record last updated2011 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Internal Medicine Physician providers in California
There are 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Madera → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Mohammad Ashraf, MDMadera, CA 936371881616159
- Simrat Batth, M.D.Madera, CA 936371245979194
- Steven Gustaveson, MDMadera, CA 936371598777559
- Tahir Hassan, M.DMadera, CA 936371346228780
- Sohaila Mojadaddi, MDMadera, CA 936371447354733
- Robert Nguyen, MDMadera, CA 936371780660704
- Amritpal Pannu, MDMadera, CA 936371306837927
- Satwant Samrao, MDMadera, CA 936371326142688
Common questions
What is Allan T. Nassar, MD's NPI number?
Allan T. Nassar, MD's National Provider Identifier (NPI) is 1033129135, issued on Aug 9, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Allan T. Nassar, MD located?
The NPPES record lists a practice address at 1111 W 4TH St, Madera, CA, 93637. Phone: (559) 662-2705. Providers update this record themselves, so call before visiting.
How can I verify Allan T. Nassar, MD's license?
NPPES lists California license number A61181, 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 Allan T. Nassar, MD prescribe under Medicare Part D?
In 2024, Allan T. Nassar, MD had 4,786 Medicare Part D claims for 339 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Allan T. Nassar, MD's MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.