Gary Haag, DO
NPI 1801868237 · Anesthesiology Physician · Winchester, VA
Gary Haag, DO is a Anesthesiology Physician provider in Winchester, VA (NPI 1801868237).
Provider details
- NPI number
- 1801868237
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- License
- H38515 (MD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 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
- 2006-02-01
- Last updated
- 2022-08-16
- Certified
- 2022-08-16
Frequently asked questions
- What is Gary Haag's NPI number?
- Gary Haag's National Provider Identifier (NPI) is 1801868237, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gary Haag's specialty?
- Gary Haag is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is Gary Haag located?
- Gary Haag's practice location on file with NPPES is 1840 Amherst St, Winchester, VA 22603.
- What is Gary Haag's phone number?
- The practice phone number listed in the NPPES registry for Gary Haag is (540) 536-8000.
- Is Gary Haag's NPI active?
- Yes — Gary Haag's NPI (1801868237) is active in the NPPES registry as of the last update on 2022-08-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.