Denis Robert Westphal, M.D.
Surgery Physician · Chico, CA
Denis Robert Westphal, M.D. is a surgery physician with a practice address in Chico, California, and NPI 1285640243, issued on Jul 31, 2006. Check the license (California G50664, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Denis Robert Westphal
- Credential
- M.D.
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- G50664 CA
Self-reported in NPPES; status is on the state search - Practice location
- 95 Declaration Dr, Chico, CA 95973
- Phone
- (530) 345-9455
- Enumerated
- Jul 31, 2006
- Record last updated
- Apr 27, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (530) 345-6628
- Medicaid ID
- 00G506640 CA
- Medicare enrollment
- Enrolled (PECOS I20040123001099); accepts Medicare assignment
- Medical or professional school
- Loma Linda University School Of Medicine, 1982
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 3,118 in California → Look up another NPI →
Also registered at 95 Declaration Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Caitlin Dugan, MSW, PPSC-SWClinical Social Worker1578446944
- Gerald Jurgenson, PH.D., MFTMarriage & Family Therapist1710923701
- Kirsten Schwab, PA-CPhysician Assistant1063722486
Verify Denis Robert Westphal in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G50664Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
46% more Medicare Part D claims than the average surgery physician in 2024
215 Medicare Part D claims for 108 beneficiaries, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims.
Most prescribed
- Cephalexin56 claims
- Doxycycline Hyclate21 claims
- Levofloxacin20 claims
- Sulfamethoxazole-Trimethoprim20 claims
- Mupirocin16 claims
- Vancomycin Hcl11 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 76.7 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Enloe Medical CenterChico, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Denis Robert Westphal among 3,118 surgery physician records in California
Denis Robert Westphal, M.D. is one of 3,118 surgery physician records with a practice address in California. 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 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 55% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated1982 · median 2003 among the 1,901 with a school on file
- Record last updated2012 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208600000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgery Physician providers in California
There are 3,118 surgery physician records in California.
All 3,118 in California → Every provider in Chico → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- Vencent Frantz, MDQuincy, CA 959711124087309
- Ben Hunt, MDQuincy, CA 959711588876593
- Steen Jensen, MD FACSQuincy, CA 959711558320739
- Justin Hunt, M.D.Paradise, CA 959691386806156
- Lyle Hunt, M.D.Paradise, CA 959691588698872
- Donald Smith, M.D.Paradise, CA 959691487677670
- Elizabeth Johnston, M.D.Oroville, CA 959661114145257
- Victoria Konovalova, D.O.Oroville, CA 959661235599788
Common questions
What is Denis Robert Westphal, M.D.'s NPI number?
Denis Robert Westphal, M.D.'s National Provider Identifier (NPI) is 1285640243, issued on Jul 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Denis Robert Westphal, M.D. located?
The NPPES record lists a practice address at 95 Declaration Dr, Chico, CA, 95973. Phone: (530) 345-9455. Providers update this record themselves, so call before visiting.
How can I verify Denis Robert Westphal, M.D.'s license?
NPPES lists California license number G50664, 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 Denis Robert Westphal, M.D. prescribe under Medicare Part D?
In 2024, Denis Robert Westphal, M.D. had 215 Medicare Part D claims for 108 beneficiaries; the average among surgery physician prescribers was 147. Part D covers Medicare prescriptions only.
What is Denis Robert Westphal, M.D.'s MIPS final score?
The 2023 MIPS final score is 76.7 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.