Mary Loudon, PHD
NPI 1821318171 · Mental Health Counselor · Seattle, WA
Mary Loudon, PHD is a Mental Health Counselor provider in Seattle, WA (NPI 1821318171).
Provider details
- NPI number
- 1821318171
- Entity type
- Individual
- Primary specialty
- Mental Health CounselorBehavioral Health & Social Service Providers
- Credential
- PHD
- Sex
- Female
- Sole proprietor
- Yes
- License
- PY60063635 (WA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
16 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
- 2010-06-09
- Last updated
- 2021-08-24
- Certified
- 2021-08-24
Frequently asked questions
- What is Mary Loudon's NPI number?
- Mary Loudon's National Provider Identifier (NPI) is 1821318171, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Loudon's specialty?
- Mary Loudon is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).
- Where is Mary Loudon located?
- Mary Loudon's practice location on file with NPPES is 1700 Westlake Ave. N., Seattle, WA 98109-6263.
- What is Mary Loudon's phone number?
- The practice phone number listed in the NPPES registry for Mary Loudon is (206) 769-2052.
- Is Mary Loudon's NPI active?
- Yes — Mary Loudon's NPI (1821318171) is active in the NPPES registry as of the last update on 2021-08-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.