Robert B. Koch, M.D.
Orthopaedic Surgery Physician · Santa Rosa, CA
Robert B. Koch, M.D. is an orthopaedic surgery physician with a practice address in Santa Rosa, California, and NPI 1649255845, issued on Dec 9, 2005. Check the license (California C134952, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Robert B. Koch
- Credential
- M.D.
- Primary taxonomy
- Orthopaedic Surgery Physician 207X00000X
- License number
- C134952 CA
Self-reported in NPPES; status is on the state search - Practice location
- 401 Bicentennial Way, Santa Rosa, CA 95403
- Phone
- (707) 393-4080
- Enumerated
- Dec 9, 2005
- Record last updated
- Dec 15, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20150714000723); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest orthopaedic surgery physician records → All 2,276 in California → Look up another NPI →
Also registered at 401 Bicentennial Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Anna Ackerman, RNRegistered Nurse1376409409
- Patricia AdamsPhysical Therapist1124971825
- Hugo Aguilar, PHARMDPharmacist1992389134
- Heather Aiello, OTR/LOccupational Therapist1851155022
- Sandra Akrawi, REGISTERED DIETITIANRegistered Dietitian1790821031
- Miguel Alcala, LCSWClinical Social Worker1629857891
Verify Robert B. Koch in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C134952Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
58% fewer Medicare Part D claims than the average orthopaedic surgery physician in 2024
147 Medicare Part D claims for 77 beneficiaries, against an average of 346 among the 16,516 providers of this specialty who prescribed in Part D. 37 claims were for opioids.
Most prescribed
- Amoxicillin48 claims
- Oxycodone Hcl21 claims
- Clindamycin Hcl11 claims
- Hydrocodone-Acetaminophen11 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
- Permanente Medical Group IncSanta Rosa, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert B. Koch among 2,276 orthopaedic surgery physician records in California
Robert B. Koch, M.D. is one of 2,276 orthopaedic surgery physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 90% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated1994 · median 2003 among the 1,347 with a school on file
- Record last updated2021 · 66% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207X00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Orthopaedic Surgery Physician providers in California
There are 2,276 orthopaedic surgery physician records in California.
All 2,276 in California → Every provider in Santa Rosa → Orthopaedic Surgery Physician nationwide →
The 8 orthopaedic surgery physician records with the nearest ZIP codes
- Ken Fujii, MDSanta Rosa, CA 954031700960879
- John Gansel, MDSanta Rosa, CA 954031992889976
- Andrew Goldstein, MDSanta Rosa, CA 954031851475925
- Robert Haimson, MDSanta Rosa, CA 954031629000815
- Alexander Iezza, M.D.Santa Rosa, CA 954031265550743
- Harvey Moskovitz, MDSanta Rosa, CA 954031588748560
- Jeffrey Mulvihill, MDSanta Rosa, CA 954031952782435
- William Ramsey, M.D.Santa Rosa, CA 954031831265073
Common questions
What is Robert B. Koch, M.D.'s NPI number?
Robert B. Koch, M.D.'s National Provider Identifier (NPI) is 1649255845, issued on Dec 9, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Robert B. Koch, M.D. located?
The NPPES record lists a practice address at 401 Bicentennial Way, Santa Rosa, CA, 95403. Phone: (707) 393-4080. Providers update this record themselves, so call before visiting.
How can I verify Robert B. Koch, M.D.'s license?
NPPES lists California license number C134952, 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 Robert B. Koch, M.D. prescribe under Medicare Part D?
In 2024, Robert B. Koch, M.D. had 147 Medicare Part D claims for 77 beneficiaries; the average among orthopaedic surgery physician prescribers was 346. 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.