Mahtab Naji, MD
NPI 1558949693 · Internal Medicine Physician · San Clemente, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mahtab Naji, MD is a Internal Medicine Physician provider in San Clemente, CA (NPI 1558949693).
Provider details
- NPI number
- 1558949693
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
5 yrs in NPPES registry
- Profile completeness25% of score
83% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
244 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 | 134 | $89 |
| 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 | 59 | $17 |
| Administration of Influenza Virus VaccineG0008 | 31 | $35 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 20 | $128 |
Typical Medicare-allowed amounts for these services range $17–$128 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 19 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 52 | 45 |
| Levothyroxine Sodium | 43 | 32 |
| Amlodipine Besylate | 42 | 36 |
| Pantoprazole Sodium | 36 | 28 |
| Losartan Potassium | 34 | 30 |
| Rosuvastatin Calcium | 33 | 27 |
| Tamsulosin Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$15 across 1 record (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)
- 28188 Moulton Pkwy Apt 1228Laguna Niguel, CA 92677-7515Phone: (949) 702-8475
Registry dates
- Enumerated
- 2021-03-30
- Last updated
- 2024-08-08
- Certified
- 2024-08-08
Frequently asked questions
- What is Mahtab Naji's NPI number?
- Mahtab Naji's National Provider Identifier (NPI) is 1558949693, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mahtab Naji's specialty?
- Mahtab Naji is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mahtab Naji located?
- Mahtab Naji's practice location on file with NPPES is 638 Camino De Los Mares Ste D4, San Clemente, CA 92673-2855.
- What is Mahtab Naji's phone number?
- The practice phone number listed in the NPPES registry for Mahtab Naji is (949) 542-8865.
- Does Mahtab Naji accept Medicare?
- Mahtab Naji is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mahtab Naji's NPI active?
- Yes — Mahtab Naji's NPI (1558949693) is active in the NPPES registry as of the last update on 2024-08-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.