John Fust, M.D.
NPI 1891821633 · Emergency Medicine Physician · Santa Cruz, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Fust, M.D. is a Emergency Medicine Physician provider in Santa Cruz, CA (NPI 1891821633).
Provider details
- NPI number
- 1891821633
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- G47866 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
122 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 66 | $97 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 40 | $138 |
| Automated Urinalysis Test81003 | 16 | $2 |
Typical Medicare-allowed amounts for these services range $2–$138 (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
Registry dates
- Enumerated
- 2007-02-26
- Last updated
- 2011-12-16
Frequently asked questions
- What is John Fust's NPI number?
- John Fust's National Provider Identifier (NPI) is 1891821633, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Fust's specialty?
- John Fust is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Fust located?
- John Fust's practice location on file with NPPES is 1555 Soquel Dr, Santa Cruz, CA 95065-1705.
- What is John Fust's phone number?
- The practice phone number listed in the NPPES registry for John Fust is (831) 462-7710.
- Does John Fust accept Medicare?
- John Fust is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Fust's NPI active?
- Yes — John Fust's NPI (1891821633) is active in the NPPES registry as of the last update on 2011-12-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.