Steven Machtinger MD & Associates Inc
NPI 1427288133 · Allergy & Immunology Physician · San Mateo, CA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Steven Machtinger MD & Associates Inc is a Allergy & Immunology Physician organization in San Mateo, CA (NPI 1427288133).
Provider details
- NPI number
- 1427288133
- Entity type
- Organization
- Primary specialty
- Allergy & Immunology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Steven Machtinger MD, Owner Physician President(650) 696-8230
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
16 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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-07-16
- Last updated
- 2023-04-20
- Certified
- 2023-04-20
Frequently asked questions
- What is Steven Machtinger MD & Associates Inc's NPI number?
- Steven Machtinger MD & Associates Inc's National Provider Identifier (NPI) is 1427288133, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Steven Machtinger MD & Associates Inc?
- Steven Machtinger MD & Associates Inc is classified in the NPPES registry as Allergy & Immunology Physician (Allopathic & Osteopathic Physicians).
- Where is Steven Machtinger MD & Associates Inc located?
- Steven Machtinger MD & Associates Inc's practice location on file with NPPES is 100 S Ellsworth Ave, San Mateo, CA 94401-3939.
- What is Steven Machtinger MD & Associates Inc's phone number?
- The practice phone number listed in the NPPES registry for Steven Machtinger MD & Associates Inc is (650) 696-8230.
- Does Steven Machtinger MD & Associates Inc accept Medicare?
- Steven Machtinger MD & Associates Inc is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Steven Machtinger MD & Associates Inc?
- The authorized official listed on Steven Machtinger MD & Associates Inc's NPPES record is Steven Machtinger MD, Owner Physician President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Steven Machtinger MD & Associates Inc's NPI active?
- Yes — Steven Machtinger MD & Associates Inc's NPI (1427288133) is active in the NPPES registry as of the last update on 2023-04-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.