Chester Day, MD
NPI 1336224716 · Psychiatry Physician · Fairfax, VA
Chester Day, MD is a Psychiatry Physician provider in Fairfax, VA (NPI 1336224716).
Provider details
- NPI number
- 1336224716
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 0415631 (KS)
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
19 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
- 2006-10-26
- Last updated
- 2022-04-05
- Certified
- 2022-04-05
Frequently asked questions
- What is Chester Day's NPI number?
- Chester Day's National Provider Identifier (NPI) is 1336224716, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Chester Day's specialty?
- Chester Day is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Chester Day located?
- Chester Day's practice location on file with NPPES is 8221 Willow Oaks Corporate Dr Ste 4-420, Fairfax, VA 22031-4512.
- What is Chester Day's phone number?
- The practice phone number listed in the NPPES registry for Chester Day is (703) 289-7560.
- Is Chester Day's NPI active?
- Yes — Chester Day's NPI (1336224716) is active in the NPPES registry as of the last update on 2022-04-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.