Dan Grinstead, M.D.
NPI 1881668010 · Internal Medicine Physician · Walla Walla, WA
Dan Grinstead, M.D. is a Internal Medicine Physician provider in Walla Walla, WA (NPI 1881668010).
Provider details
- NPI number
- 1881668010
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD00044572 (WA)
Specialties & taxonomies
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
- 2006-02-14
- Last updated
- 2007-11-27
Frequently asked questions
- What is Dan Grinstead's NPI number?
- Dan Grinstead's National Provider Identifier (NPI) is 1881668010, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Dan Grinstead's specialty?
- Dan Grinstead is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Dan Grinstead located?
- Dan Grinstead's practice location on file with NPPES is 55 W Tietan St, Walla Walla, WA 99362-4445.
- What is Dan Grinstead's phone number?
- The practice phone number listed in the NPPES registry for Dan Grinstead is (509) 525-3720.
- Is Dan Grinstead's NPI active?
- Yes — Dan Grinstead's NPI (1881668010) is active in the NPPES registry as of the last update on 2007-11-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.