Rudolph H. Knaack, MD
Family Medicine Physician · Oak Harbor, WA
Rudolph H. Knaack, MD is a family medicine physician with a practice address in Oak Harbor, Washington, and NPI 1225082001, issued on May 19, 2006. Check the license (Washington MD00013905, as entered in NPPES) on the Washington Medical Commission; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Rudolph H. Knaack
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- MD00013905 WA
Self-reported in NPPES; status is on the state search - Practice location
- 275 SE Cabot Drive, Oak Harbor, WA 98277
- Phone
- (360) 675-6648
- Enumerated
- May 19, 2006
- Record last updated
- Jul 13, 2026
- Fax
- (360) 679-2487
- Medicaid ID
- 1719301 WA
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 5,534 in Washington → Look up another NPI →
Also registered at 275 SE Cabot Drive
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Rudolph H. Knaack in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD00013905Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Rudolph H. Knaack among 5,534 family medicine physician records in Washington
Rudolph H. Knaack, MD is one of 5,534 family medicine physician records with a practice address in Washington. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 58% newer
- In a Medicare fileNo · 73% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2026 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
29 family medicine physician records list a practice address in Oak Harbor
They are 29 of the 985 NPPES records with a practice address in Oak Harbor, and 5,534 family medicine physician records in Washington. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 5,534 in Washington → Every provider in Oak Harbor → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Tony Bartley, M.D.Oak Harbor, WA 982771487620076
- Jessica Boyd, APRNOak Harbor, WA 982771811735707
- Sara Carroll, MDOak Habor, WA 982771285165027
- Travis Erickson, DOOak Harbor, WA 982771952350431
- Haigh Fox, MDOak Harbor, WA 982771215994603
- Kirk Gasper, M.D.Oak Harbor, WA 982771003899899
- Carina Hopen, M.D.Oak Harbor, WA 982771437139417
- Douglas Langrock, MDOak Harbor, WA 982771306890199
Common questions
What is Rudolph H. Knaack, MD's NPI number?
Rudolph H. Knaack, MD's National Provider Identifier (NPI) is 1225082001, issued on May 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Rudolph H. Knaack, MD located?
The NPPES record lists a practice address at 275 SE Cabot Drive, Oak Harbor, WA, 98277. Phone: (360) 675-6648. Providers update this record themselves, so call before visiting.
How can I verify Rudolph H. Knaack, MD's license?
NPPES lists Washington license number MD00013905, as entered by the provider. Search the Washington Medical Commission at https://wahelms.my.site.com/s/license-search. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.