John-Marc Austin, M.D.
NPI 1558936369 · Psychiatry Physician · Londonderry, NH
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John-Marc Austin, M.D. is a Psychiatry Physician provider in Londonderry, NH (NPI 1558936369).
Provider details
- NPI number
- 1558936369
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- 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
5 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
4 documented practice locations
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
Additional practice locations (3)
- 36 Clinton StConcord, NH 03301-2359Phone: (603) 271-5300
- 207 S Main StNewmarket, NH 03857-1843Phone: (603) 519-7264
- 333 Borthwick Ave Ste 100Portsmouth, NH 03801-4198Phone: (413) 314-1778
Registry dates
- Enumerated
- 2021-05-24
- Last updated
- 2026-05-04
- Certified
- 2026-05-04
Frequently asked questions
- What is John-Marc Austin's NPI number?
- John-Marc Austin's National Provider Identifier (NPI) is 1558936369, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John-Marc Austin's specialty?
- John-Marc Austin is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is John-Marc Austin located?
- John-Marc Austin's practice location on file with NPPES is 77 Gilcreast Rd Ste 3000, Londonderry, NH 03053-3563.
- What is John-Marc Austin's phone number?
- The practice phone number listed in the NPPES registry for John-Marc Austin is (603) 883-0005.
- Does John-Marc Austin accept Medicare?
- John-Marc Austin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John-Marc Austin's NPI active?
- Yes — John-Marc Austin's NPI (1558936369) is active in the NPPES registry as of the last update on 2026-05-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.