Ennis Zaitoon, M.D.
NPI 1235307141 · Internal Medicine Physician · Corona, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ennis Zaitoon, M.D. is a Internal Medicine Physician provider in Corona, CA (NPI 1235307141).
Provider details
- NPI number
- 1235307141
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 01067223 (IN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
18 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
621 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 238 | $131 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 162 | $17 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 61 | $133 |
| Annual Depression Screening, 5 to 15 MinutesG0444 | 58 | $20 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 49 | $94 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 85 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 285 | 93 |
| Amlodipine Besylate | 205 | 62 |
| Losartan Potassium | 196 | 62 |
| Metformin Hcl | 142 | 50 |
| Lisinopril | 142 | 45 |
| Levothyroxine Sodium | 122 | 40 |
| Tamsulosin Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$227 across 11 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
Additional practice locations (1)
- 7905 Calumet AveMunster, IN 46321-1215Phone: (219) 836-5800Fax: (219) 836-8073
Registry dates
- Enumerated
- 2008-02-13
- Last updated
- 2024-09-17
- Certified
- 2024-09-17
Frequently asked questions
- What is Ennis Zaitoon's NPI number?
- Ennis Zaitoon's National Provider Identifier (NPI) is 1235307141, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ennis Zaitoon's specialty?
- Ennis Zaitoon is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ennis Zaitoon located?
- Ennis Zaitoon's practice location on file with NPPES is 21634 Retreat Pkwy, Corona, CA 92883-6100.
- What is Ennis Zaitoon's phone number?
- The practice phone number listed in the NPPES registry for Ennis Zaitoon is (951) 493-6870.
- Does Ennis Zaitoon accept Medicare?
- Ennis Zaitoon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ennis Zaitoon's NPI active?
- Yes — Ennis Zaitoon's NPI (1235307141) is active in the NPPES registry as of the last update on 2024-09-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.