Mustafa Ammar, M.D.
NPI 1558363168 · Internal Medicine Physician · Yuba City, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mustafa Ammar, M.D. is a Internal Medicine Physician provider in Yuba City, CA (NPI 1558363168).
Provider details
- NPI number
- 1558363168
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A52256 (CA)
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
20 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
243 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) |
|---|---|---|
| Urinalysis, Manual Test81002 | 99 | $3 |
| Hemoglobin A1c Level, By Device for Home Use83037 | 73 | $0 |
| Blood Count, Hemoglobin85018 | 30 | $2 |
| Blood Glucose (sugar) Test Performed By Hand-Held Instrument82962 | 27 | $3 |
| Detection Test By Immunoassay With Direct Visual Observation for Streptococcus, Group a (strep)87880 | 14 | $16 |
Typical Medicare-allowed amounts for these services range $0–$16 (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 · 104 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 497 | 122 |
| Metformin Hcl | 304 | 77 |
| Amlodipine Besylate | 250 | 64 |
| Omeprazole | 247 | 52 |
| Losartan Potassium | 233 | 58 |
| Gabapentin | 185 | 45 |
| Hydrocodone/Acetaminophen |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$836 across 47 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)
- 608 J StMarysville, CA 95901-5413Phone: (530) 749-4180Fax: (530) 740-5150
Registry dates
- Enumerated
- 2005-08-12
- Last updated
- 2026-03-26
- Certified
- 2026-03-26
Frequently asked questions
- What is Mustafa Ammar's NPI number?
- Mustafa Ammar's National Provider Identifier (NPI) is 1558363168, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mustafa Ammar's specialty?
- Mustafa Ammar is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mustafa Ammar located?
- Mustafa Ammar's practice location on file with NPPES is 1000 Sutter St, Yuba City, CA 95991-3459.
- What is Mustafa Ammar's phone number?
- The practice phone number listed in the NPPES registry for Mustafa Ammar is (530) 673-9420.
- Does Mustafa Ammar accept Medicare?
- Mustafa Ammar is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mustafa Ammar's NPI active?
- Yes — Mustafa Ammar's NPI (1558363168) is active in the NPPES registry as of the last update on 2026-03-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.