Nazia Hasan, M.D., M.P.H.
NPI 1831394667 · Gastroenterology Physician · Fairfield, CA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nazia Hasan, M.D., M.P.H. is a Gastroenterology Physician provider in Fairfield, CA (NPI 1831394667).
Provider details
- NPI number
- 1831394667
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D., M.P.H.
- Sex
- Female
- Sole proprietor
- No
- License
- A137560 (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
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
667 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) |
|---|---|---|
| Ultrasound Exam of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43259 | 129 | $167 |
| Review By Radiologist of Image From Tube Placement Into Bile Duct Using an Endoscope74328 | 102 | $26 |
| Ultrasound Guided Needle Aspiration Or Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43242 | 71 | $249 |
| Insertion of Stent Into Pancreatic Or Bile Duct Using a Flexible Endoscope43274 | 68 | $372 |
| Removal of Stone Or Debris From Bile Or Pancreatic Duct Using a Flexible Endoscope43264 | 60 | $139 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 1 distinct drug on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ciprofloxacin Hcl | 20 | 19 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,715 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
Additional practice locations (1)
- 4150 Clement StSan Francisco, CA 94121-1563Phone: (415) 750-4126
Registry dates
- Enumerated
- 2007-06-20
- Last updated
- 2022-09-26
- Certified
- 2022-09-26
Frequently asked questions
- What is Nazia Hasan's NPI number?
- Nazia Hasan's National Provider Identifier (NPI) is 1831394667, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nazia Hasan's specialty?
- Nazia Hasan is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Nazia Hasan located?
- Nazia Hasan's practice location on file with NPPES is 4520 Business Center Dr., Fairfield, CA 94534.
- What is Nazia Hasan's phone number?
- The practice phone number listed in the NPPES registry for Nazia Hasan is (707) 646-3555.
- Does Nazia Hasan accept Medicare?
- Nazia Hasan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nazia Hasan's NPI active?
- Yes — Nazia Hasan's NPI (1831394667) is active in the NPPES registry as of the last update on 2022-09-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.