Rex Klein Baker, MD
Family Medicine Physician · Salem, OR
Rex Klein Baker, MD is a family medicine physician with a practice address in Salem, Oregon, and NPI 1891834891, issued on Feb 6, 2007. Check the license on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Rex Klein Baker
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- DR.0067328 CO
MD2008-0191 NM
Self-reported in NPPES; status is on the state search - Practice location
- 2400 Lancaster Dr NE, Salem, OR 97305
- Phone
- (503) 361-5400
- Enumerated
- Feb 6, 2007
- Record last updated
- Aug 29, 2022
- Medicare enrollment
- Enrolled (PECOS I20130124000423); accepts Medicare assignment
- Medical or professional school
- University Of New Mexico School Of Medicine, 2004
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,847 in Oregon → Look up another NPI →
Also registered at 2400 Lancaster Dr NE
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ellany Adams, LCSWClinical Social Worker1083005748
- Nghia BanhPharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1689083073
- James Barger, M.S.N., A.N.P.Occupational Health Nurse Practitioner1114144193
- Elizabeth Bjornskov, M.D.Neurology Physician1265528012
- Lucy BollingerPediatrics Physician1669904660
- Francine Boullosa, PHYSICIAN ASSISTANTPhysician Assistant1275645715
Verify Rex Klein Baker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical BoardCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average family medicine physician in 2024
282 Medicare Part D claims for 210 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 16 claims were for opioids.
Most prescribed
- Doxycycline Monohydrate26 claims
- Cefadroxil19 claims
- Nitrofurantoin Mono-Macro18 claims
- Prednisone17 claims
- Albuterol Sulfate Hfa12 claims
- Paxlovid12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Kaiser Foundation Health Plan OF The NorthwestClackamas, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Rex Klein Baker among 2,847 family medicine physician records in Oregon
Rex Klein Baker, MD is one of 2,847 family medicine physician records with a practice address in Oregon. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 47% of them.
- NPI issued2007 · 47% of these records are older, 45% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2004 · median 2009 among the 1,671 with a school on file
- Record last updated2022 · 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 Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
154 family medicine physician records list a practice address in Salem
They are 154 of the 6,700 NPPES records with a practice address in Salem, and 2,847 family medicine physician records in Oregon.
All 2,847 in Oregon → Every provider in Salem → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Roger Applegate, MDSalem, OR 973051770584294
- Yara Delgado, MDSalem, OR 973051942286596
- Gia Gray, MDSalem, OR 973051700965837
- William Habjan, D.O.Salem, OR 973051689748923
- Aaron Hanson, DOSalem, OR 973051528087400
- John Hayes, MDSalem, OR 973051700975174
- Janet Neuburg, M.D.Salem, OR 973051497869457
- Mark Nurre, MDSalem, OR 973051144239435
Common questions
What is Rex Klein Baker, MD's NPI number?
Rex Klein Baker, MD's National Provider Identifier (NPI) is 1891834891, issued on Feb 6, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Rex Klein Baker, MD located?
The NPPES record lists a practice address at 2400 Lancaster Dr NE, Salem, OR, 97305. Phone: (503) 361-5400. Providers update this record themselves, so call before visiting.
How can I verify Rex Klein Baker, MD's license?
Search the Oregon Medical Board at https://www.oregon.gov/OMB/Pages/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Rex Klein Baker, MD prescribe under Medicare Part D?
In 2024, Rex Klein Baker, MD had 282 Medicare Part D claims for 210 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. 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.