Nielsen Fernandez-Becker, M.D., PH.D.
NPI 1972678639 · Gastroenterology Physician · Palo Alto, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nielsen Fernandez-Becker, M.D., PH.D. is a Gastroenterology Physician provider in Palo Alto, CA (NPI 1972678639).
Provider details
- NPI number
- 1972678639
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D., PH.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A109586 (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
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
535 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 High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 70 | $190 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 51 | $227 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 49 | $124 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 45 | $141 |
| Study of Esophagus to Assess Movement91010 | 44 | $73 |
| Monitoring and Recording of Esophageal Function Through Nasal Tube With Electrode |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 92 | 32 |
| Famotidine | 45 | 14 |
| Linaclotidebrand: Linzess | 38 | — |
| Sodium Chloride/Nahco3/Kcl/Pegbrand: Peg 3350-Electrolyte | 32 | 31 |
| Prucalopride Succinatebrand: Motegrity | 24 | — |
| Lipase/Protease/Amylasebrand: Creon | 21 | — |
| Nortriptyline Hcl | 17 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$134 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
Registry dates
- Enumerated
- 2006-11-21
- Last updated
- 2024-04-29
- Certified
- 2024-04-29
Frequently asked questions
- What is Nielsen Fernandez-Becker's NPI number?
- Nielsen Fernandez-Becker's National Provider Identifier (NPI) is 1972678639, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nielsen Fernandez-Becker's specialty?
- Nielsen Fernandez-Becker is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Nielsen Fernandez-Becker located?
- Nielsen Fernandez-Becker's practice location on file with NPPES is 300 Pasteur Dr, Palo Alto, CA 94304-2203.
- What is Nielsen Fernandez-Becker's phone number?
- The practice phone number listed in the NPPES registry for Nielsen Fernandez-Becker is (650) 723-4000.
- Does Nielsen Fernandez-Becker accept Medicare?
- Nielsen Fernandez-Becker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nielsen Fernandez-Becker's NPI active?
- Yes — Nielsen Fernandez-Becker's NPI (1972678639) is active in the NPPES registry as of the last update on 2024-04-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.