NPPES file of Aug 9, 2026

Clayton Burnett Hess, MD

Radiation Oncology Physician · Grass Valley, CA

Clayton Burnett Hess, MD is a radiation oncology physician with a practice address in Grass Valley, California, and NPI 1235429507, issued on Apr 7, 2011. Check the license (California A123801, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1235429507
Name
Clayton Burnett Hess
Credential
MD
Primary taxonomy
Radiation Oncology Physician 2085R0001X
License numbers
A123801 CA
081479 GA
270290 MA
BP1-0039560 TX
Self-reported in NPPES; status is on the state search
Practice location
155 Glasson Way Bldg 3L-20, Grass Valley, CA 95945
Phone
(530) 274-6600
Enumerated
Apr 7, 2011
Record last updated
Feb 7, 2024
Medicare enrollment
Enrolled (PECOS I20150804005725); accepts Medicare assignment
Medical or professional school
Pennsylvania State University College Of Medicine, 2011
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Verify Clayton Burnett Hess in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A123801
    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

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2.1 times the Medicare Part D claims of the average radiation oncology physician in 2024

279 Medicare Part D claims for 86 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. 40 claims were for opioids.

  1. Clayton Hess279
  2. Specialty average134

Most prescribed

  1. Tamsulosin Hcl56 claims
  2. Nystatin37 claims
  3. Lidocaine Hcl Viscous36 claims
  4. Hydrocodone-Acetaminophen30 claims
  5. Dexamethasone17 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.

Industry payments in 2024: $17.29

1 payment: food and beverage; the largest payer was Sensus Healthcare, Inc. The 3,275 providers of this specialty with any payment received $1,897.85 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Clayton Hess$17.29
  2. Specialty average$1,897.85

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. Grass Valley Radiation OncologyGrass Valley, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Clayton Burnett Hess among 735 radiation oncology physician records in California

Clayton Burnett Hess, MD is one of 735 radiation oncology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 69% of them.

  • NPI issued2011 · 69% of these records are older, 29% newer
  • In a Medicare fileYes · 83% of these records are
  • In the CMS Doctors and Clinicians fileYes · 74% of these records are
  • Graduated2011 · median 2005 among the 545 with a school on file
  • Record last updated2024 · 55% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Radiation Oncology Physician providers in California

There are 735 radiation oncology physician records in California.

The 8 radiation oncology physician records with the nearest ZIP codes

  1. Richard Evans, MDGrass Valley, CA 959451649344953
  2. David Kraus, MDGrass Valley, CA 959451710987953
  3. Anne Dawson, M.D.Chico, CA 959261902847981
  4. Leith Hathout, MDChico, CA 959261700380623
  5. Harry Lomas, M.D.Chico, CA 959261942294202
  6. Erik Stickney, M.D.Chico, CA 959261619937984
  7. Steven Wahlen, M.D.Chico, CA 959261457308769
  8. Thomas Guerrero, MD, PHDOroville, CA 959661932281334

Common questions

What is Clayton Burnett Hess, MD's NPI number?

Clayton Burnett Hess, MD's National Provider Identifier (NPI) is 1235429507, issued on Apr 7, 2011. An NPI identifies a provider in billing; it is not a license.

Where is Clayton Burnett Hess, MD located?

The NPPES record lists a practice address at 155 Glasson Way Bldg 3L-20, Grass Valley, CA, 95945. Phone: (530) 274-6600. Providers update this record themselves, so call before visiting.

How can I verify Clayton Burnett Hess, MD's license?

NPPES lists California license number A123801, 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 Clayton Burnett Hess, MD prescribe under Medicare Part D?

In 2024, Clayton Burnett Hess, MD had 279 Medicare Part D claims for 86 beneficiaries; the average among radiation oncology physician prescribers was 134. 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.