Daniel Seid, MD
NPI 1053470658 · Gastroenterology Physician · Fontana, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Daniel Seid, MD is a Gastroenterology Physician provider in Fontana, CA (NPI 1053470658).
Provider details
- NPI number
- 1053470658
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G65516 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-C | 191 | 181 |
| Mesalamine | 75 | 23 |
| Colesevelam Hcl | 51 | 13 |
| Omeprazole | 31 | 16 |
| Ursodiol | 25 | — |
| Lipase/Protease/Amylasebrand: Zenpep | 17 | — |
| Budesonidebrand: Budesonide Dr | 14 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-12-08
- Last updated
- 2021-11-30
Frequently asked questions
- What is Daniel Seid's NPI number?
- Daniel Seid's National Provider Identifier (NPI) is 1053470658, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Daniel Seid's specialty?
- Daniel Seid is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Daniel Seid located?
- Daniel Seid's practice location on file with NPPES is 9961 Sierra Ave, Fontana, CA 92335-6720.
- What is Daniel Seid's phone number?
- The practice phone number listed in the NPPES registry for Daniel Seid is (909) 427-3910.
- Does Daniel Seid accept Medicare?
- Daniel Seid is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Daniel Seid's NPI active?
- Yes — Daniel Seid's NPI (1053470658) is active in the NPPES registry as of the last update on 2021-11-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.