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Douglas Markham, DC
NPI 1861573883 · Chiropractor · Thousand Oaks, CA
Douglas Markham, DC is a Chiropractor provider in Thousand Oaks, CA (NPI 1861573883).
Provider details
- NPI number
- 1861573883
- Entity type
- Individual
- Primary specialty
- ChiropractorChiropractic Providers
- Credential
- DC
- Sex
- Male
- Sole proprietor
- Yes
- License
- DC19530 (CA)
Specialties & taxonomies
Chiropractic Providers
Profile Score
Detailed profile(90/100 index)
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
3415 Campus Drive
Thousand Oaks, CA 91360-8400
Phone: (805) 496-6255
Fax: (805) 496-7288
Approximate (ZIP-level) locationGet directions
Mailing address
3835r E Thousand Oaks Blvd
Thousand Oaks, CA 91362-6622
Registry dates
- Enumerated
- 2006-10-17
- Last updated
- 2008-05-07
Frequently asked questions
- What is Douglas Markham's NPI number?
- Douglas Markham's National Provider Identifier (NPI) is 1861573883, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Douglas Markham's specialty?
- Douglas Markham is listed in the NPPES registry with a primary specialty of Chiropractor (Chiropractic Providers).
- Where is Douglas Markham located?
- Douglas Markham's practice location on file with NPPES is 3415 Campus Drive, Thousand Oaks, CA 91360-8400.
- What is Douglas Markham's phone number?
- The practice phone number listed in the NPPES registry for Douglas Markham is (805) 496-6255.
- Is Douglas Markham's NPI active?
- Yes — Douglas Markham's NPI (1861573883) is active in the NPPES registry as of the last update on 2008-05-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.