Joseph Hernandez, MD, PHD
NPI 1104052232 · Allergy & Immunology Physician · Palo Alto, CA
Enrolled with Medicare as Practitioner - Allergy/Immunology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joseph Hernandez, MD, PHD is a Allergy & Immunology Physician provider in Palo Alto, CA (NPI 1104052232).
Provider details
- NPI number
- 1104052232
- Entity type
- Individual
- Primary specialty
- Allergy & Immunology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Male
- Sole proprietor
- No
- License
- A107450 (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 tenure28% of score
17 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
16 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 16 | $146 |
Typical Medicare-allowed amounts for these services range $146–$146 (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.
Practice location
Mailing address
Additional practice locations (1)
- 269 Campus DrImmunology and Allergy, Ccsr 3215Stanford, CA 94305-5366Phone: (650) 723-5227
Registry dates
- Enumerated
- 2009-06-03
- Last updated
- 2024-04-26
- Certified
- 2024-04-26
Frequently asked questions
- What is Joseph Hernandez's NPI number?
- Joseph Hernandez's National Provider Identifier (NPI) is 1104052232, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joseph Hernandez's specialty?
- Joseph Hernandez is listed in the NPPES registry with a primary specialty of Allergy & Immunology Physician (Allopathic & Osteopathic Physicians).
- Where is Joseph Hernandez located?
- Joseph Hernandez's practice location on file with NPPES is 725 Welch Rd, Palo Alto, CA 94304-1601.
- What is Joseph Hernandez's phone number?
- The practice phone number listed in the NPPES registry for Joseph Hernandez is (650) 497-8000.
- Does Joseph Hernandez accept Medicare?
- Joseph Hernandez is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joseph Hernandez's NPI active?
- Yes — Joseph Hernandez's NPI (1104052232) is active in the NPPES registry as of the last update on 2024-04-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.