Steven Portouw, M.D.
NPI 1659371995 · Emergency Medicine Physician · Encinitas, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Steven Portouw, M.D. is a Emergency Medicine Physician provider in Encinitas, CA (NPI 1659371995).
Provider details
- NPI number
- 1659371995
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- G85996 (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
20 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
236 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 52 | $137 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 51 | $97 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Tracing93005 | 35 | $7 |
| Automated Urinalysis Test81003 | 33 | $2 |
| Injection of Drug Or Substance Into Vein96374 | 22 | $41 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-07-28
- Last updated
- 2015-07-24
Frequently asked questions
- What is Steven Portouw's NPI number?
- Steven Portouw's National Provider Identifier (NPI) is 1659371995, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Steven Portouw's specialty?
- Steven Portouw is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Steven Portouw located?
- Steven Portouw's practice location on file with NPPES is 354 Santa Fe Dr, Encinitas, CA 92024-5142.
- What is Steven Portouw's phone number?
- The practice phone number listed in the NPPES registry for Steven Portouw is (760) 230-2251.
- Does Steven Portouw accept Medicare?
- Steven Portouw is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Steven Portouw's NPI active?
- Yes — Steven Portouw's NPI (1659371995) is active in the NPPES registry as of the last update on 2015-07-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.