Essam Mostafa, M.D.
NPI 1316932270 · Nephrology Physician · Fountain Valley, CA
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Essam Mostafa, M.D. is a Nephrology Physician provider in Fountain Valley, CA (NPI 1316932270).
Provider details
- NPI number
- 1316932270
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- C55143 (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
20 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
4,854 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 2,843 | $122 |
| Critical Care, First 30-74 Minutes99291 | 901 | $216 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 386 | $179 |
| Hemodialysis Procedure With Physician Evaluation90935 | 261 | $73 |
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960 | 186 | $369 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 144 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Furosemide | 48 | 18 |
| Hydralazine Hcl | 44 | 13 |
| Parenteral Amino Acid 20% No.1brand: Prosol | 41 | — |
| Calcitriol | 38 | — |
| Amlodipine Besylate | 33 | — |
| Clonidine Hcl | 28 | — |
| Bumetanide | 24 | — |
| Sevelamer Carbonate | 23 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$294 across 14 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
- 2005-09-16
- Last updated
- 2019-09-16
Frequently asked questions
- What is Essam Mostafa's NPI number?
- Essam Mostafa's National Provider Identifier (NPI) is 1316932270, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Essam Mostafa's specialty?
- Essam Mostafa is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Essam Mostafa located?
- Essam Mostafa's practice location on file with NPPES is 11100 Warner Ave Ste 158, Fountain Valley, CA 92708-7510.
- What is Essam Mostafa's phone number?
- The practice phone number listed in the NPPES registry for Essam Mostafa is (714) 486-2586.
- Does Essam Mostafa accept Medicare?
- Essam Mostafa is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Essam Mostafa's NPI active?
- Yes — Essam Mostafa's NPI (1316932270) is active in the NPPES registry as of the last update on 2019-09-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.