Allan Giesen, MD DO
NPI 1538263991 · Psychiatry Physician · Boston, MA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Allan Giesen, MD DO is a Psychiatry Physician provider in Boston, MA (NPI 1538263991).
Provider details
- NPI number
- 1538263991
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD DO
- Sex
- Male
- Sole proprietor
- No
- License
- 222687 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$49 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-07
- Last updated
- 2012-03-29
Frequently asked questions
- What is Allan Giesen's NPI number?
- Allan Giesen's National Provider Identifier (NPI) is 1538263991, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Allan Giesen's specialty?
- Allan Giesen is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Allan Giesen located?
- Allan Giesen's practice location on file with NPPES is 271 Huntington Ave, Boston, MA 02115.
- What is Allan Giesen's phone number?
- The practice phone number listed in the NPPES registry for Allan Giesen is (617) 267-3700.
- Does Allan Giesen accept Medicare?
- Allan Giesen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Allan Giesen's NPI active?
- Yes — Allan Giesen's NPI (1538263991) is active in the NPPES registry as of the last update on 2012-03-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.