John Mahlstedt
NPI 1891172854 · Child & Adolescent Psychiatry Physician · White Plains, NY
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Mahlstedt is a Child & Adolescent Psychiatry Physician provider in White Plains, NY (NPI 1891172854).
Provider details
- NPI number
- 1891172854
- Entity type
- Individual
- Primary specialty
- Child & Adolescent Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
11 yrs in NPPES registry
- Profile completeness38% of score
83% 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
- 2015-04-29
- Last updated
- 2021-12-17
- Certified
- 2021-12-17
Frequently asked questions
- What is John Mahlstedt's NPI number?
- John Mahlstedt's National Provider Identifier (NPI) is 1891172854, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Mahlstedt's specialty?
- John Mahlstedt is listed in the NPPES registry with a primary specialty of Child & Adolescent Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is John Mahlstedt located?
- John Mahlstedt's practice location on file with NPPES is 21 Bloomingdale Rd, White Plains, NY 10605-1504.
- What is John Mahlstedt's phone number?
- The practice phone number listed in the NPPES registry for John Mahlstedt is (914) 997-4875.
- Does John Mahlstedt accept Medicare?
- John Mahlstedt is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Mahlstedt's NPI active?
- Yes — John Mahlstedt's NPI (1891172854) is active in the NPPES registry as of the last update on 2021-12-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.