Allan Nassar, MD
NPI 1033129135 · Internal Medicine Physician · Madera, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Allan Nassar, MD is a Internal Medicine Physician provider in Madera, CA (NPI 1033129135).
Provider details
- NPI number
- 1033129135
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A61181 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,528 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 629 | $95 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 268 | $136 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 193 | $141 |
| Annual Depression Screening, 5 to 15 MinutesG0444 | 187 | $21 |
| Administration of Influenza Virus VaccineG0008 | 74 | $33 |
| Urinalysis, Manual Test81002 | 57 | $3 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 88 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 389 | 116 |
| Amlodipine Besylate | 259 | 73 |
| Hydrochlorothiazide | 206 | 54 |
| Levothyroxine Sodium | 188 | 50 |
| Losartan Potassium | 182 | 53 |
| Carvedilol | 120 | 36 |
| Omeprazole | 112 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$169 across 4 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-09
- Last updated
- 2011-03-22
Frequently asked questions
- What is Allan Nassar's NPI number?
- Allan Nassar's National Provider Identifier (NPI) is 1033129135, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Allan Nassar's specialty?
- Allan Nassar is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Allan Nassar located?
- Allan Nassar's practice location on file with NPPES is 1111 W 4th St, Madera, CA 93637-4474.
- What is Allan Nassar's phone number?
- The practice phone number listed in the NPPES registry for Allan Nassar is (559) 662-2705.
- Does Allan Nassar accept Medicare?
- Allan Nassar is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Allan Nassar's NPI active?
- Yes — Allan Nassar's NPI (1033129135) is active in the NPPES registry as of the last update on 2011-03-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.