Rex Dell Harner, M.D.
Family Medicine Physician · Rohnert Park, CA
Rex Dell Harner, M.D. is a family medicine physician with a practice address in Rohnert Park, California, and NPI 1528066321, issued on Jul 14, 2005. Check the license (California G29415, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Rex Dell Harner
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- G29415 CA
Self-reported in NPPES; status is on the state search - Practice location
- 5300 Snyder LN, Rohnert Park, CA 94928
- Phone
- (707) 585-8347
- Enumerated
- Jul 14, 2005
- Record last updated
- Apr 30, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (707) 585-8056
- Medicaid ID
- 00G294150 CA
- Medicare enrollment
- Enrolled (PECOS I20070604000770); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 1973
- Entity
- Type 1 · individual
Also registered at 5300 Snyder LN
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Margo Budman, MDFamily Medicine Physician1710949821
- Elliott Freed, L.AC.Acupuncturist1982816906
- Richard Graham, D.D.S.General Practice Dentistry1295728061
- Nicholas Karney, DMDDentist1558682286
- Steven Levenberg, DOFamily Medicine Physician1952350381
- Andrew Schwartz, D.O.Family Medicine Physician1245272004
Verify Rex Dell Harner in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G29415Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
42% more Medicare Part D claims than the average family medicine physician in 2024
5,025 Medicare Part D claims for 367 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 407 claims were for opioids.
Most prescribed
- Atorvastatin Calcium405 claims
- Hydrocodone-Acetaminophen229 claims
- Amlodipine Besylate201 claims
- Benazepril Hcl164 claims
- Levothyroxine Sodium162 claims
- Hydrochlorothiazide147 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
- Sutter Bay Medical FoundationSanta Rosa, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
33 family medicine physician records list a practice address in Rohnert Park
They are 33 of the 483 NPPES records with a practice address in Rohnert Park, and 17,133 family medicine physician records in California.
All 33 in Rohnert Park → All 17,133 in California → Every provider in Rohnert Park →
Other family medicine physician records in California
- Omer Aba-Omer, MDSanta Monica, CA1649702093
- Michelle Ababa, MDWilmington, CA1710922513
- Anna Tzeitel Abalos, MDRoseville, CA1720200017
- Adan Abarca, MDAnaheim, CA1760553689
- Vanessa Abarca, DOVentura, CA1952040859
- Lorraine Abate, M.D.Sacramento, CA1104840008
- Robert Abatecola, MDCastro Valley, CA1669551719
- Romeo Abaya, M.D.Cottonwood, CA1598053506
- Effiem Abbah, MD, MPHSan Francisco, CA1821185133
- Khuzeman Abbasi, MDSanta Rosa, CA1841979952
Common questions
What is Rex Dell Harner, M.D.'s NPI number?
Rex Dell Harner, M.D.'s National Provider Identifier (NPI) is 1528066321, issued on Jul 14, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Rex Dell Harner, M.D. located?
The NPPES record lists a practice address at 5300 Snyder LN, Rohnert Park, CA, 94928. Phone: (707) 585-8347. Providers update this record themselves, so call before visiting.
How can I verify Rex Dell Harner, M.D.'s license?
NPPES lists California license number G29415, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Rex Dell Harner, M.D. prescribe under Medicare Part D?
In 2024, Rex Dell Harner, M.D. had 5,025 Medicare Part D claims for 367 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.