Benjamin Richard Oldach, DO
Family Medicine Physician · Auburn, CA
Benjamin Richard Oldach, DO is a family medicine physician with a practice address in Auburn, California, and NPI 1366930893, issued on Apr 30, 2018. Check the license (California 20A16668, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Benjamin Richard Oldach
- Credential
- DO
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 20A16668 CA
Self-reported in NPPES; status is on the state search - Practice location
- 11670 Atwood RD, Auburn, CA 95603
- Phone
- (530) 887-2800
- Enumerated
- Apr 30, 2018
- Record last updated
- Sep 2, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20201123002959); accepts Medicare assignment
- Medical or professional school
- Ohio University, College Of Osteopathic Medicine, 2017
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 11670 Atwood RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ellen Aoki, M.D.Pediatrics Physician1801923719
- Umaima ArsiwalaDental Hygienist1801782743
- Bonnie Bates, MFTMarriage & Family Therapist1316087448
- Sara Catinari Shakked, MDFamily Medicine Physician1447540216
- Desiree Coniglio, NPPsychiatric/Mental Health Nurse Practitioner1366582025
- Candice Faciana, RDHDental Hygienist1306509021
Verify Benjamin Richard Oldach in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A16668Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
9% fewer Medicare Part D claims than the average family medicine physician in 2024
3,225 Medicare Part D claims for 157 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 208 claims were for opioids.
Most prescribed
- Atorvastatin Calcium163 claims
- Omeprazole109 claims
- Amlodipine Besylate106 claims
- Losartan Potassium100 claims
- Lisinopril86 claims
- Levothyroxine Sodium84 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 MIPS final score for 2023 (Medicare payment program): 96.5 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 2 group practices
- Chapa-DE Indian Health Program, Inc.Auburn, CA
- Dignity Health Medical FoundationGrass Valley, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Benjamin Richard Oldach among 17,133 family medicine physician records in California
Benjamin Richard Oldach, DO is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 82% of them.
- NPI issued2018 · 82% of these records are older, 15% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2017 · median 2005 among the 10,652 with a school on file
- Record last updated2020 · 58% 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 California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
45 family medicine physician records list a practice address in Auburn
They are 45 of the 1,392 NPPES records with a practice address in Auburn, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Auburn → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Joseph Cerny, MDAuburn, CA 956031740372796
- Jennifer Clothier, MDAuburn, CA 956031245333442
- Alan Gruenefeldt, MDAuburn, CA 956031780795930
- Michael Hooper, M.D.Auburn, CA 956031447236096
- Mark Knoble, M.D.Auburn, CA 956031174617799
- Francesca Lane, D.O.Auburn, CA 956031104806330
- Gerry Lee, MDAuburn, CA 956031740373356
- Patrick Ogilvie, MDAuburn, CA 956031821099003
Common questions
What is Benjamin Richard Oldach, DO's NPI number?
Benjamin Richard Oldach, DO's National Provider Identifier (NPI) is 1366930893, issued on Apr 30, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Benjamin Richard Oldach, DO located?
The NPPES record lists a practice address at 11670 Atwood RD, Auburn, CA, 95603. Phone: (530) 887-2800. Providers update this record themselves, so call before visiting.
How can I verify Benjamin Richard Oldach, DO's license?
NPPES lists California license number 20A16668, 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 Benjamin Richard Oldach, DO prescribe under Medicare Part D?
In 2024, Benjamin Richard Oldach, DO had 3,225 Medicare Part D claims for 157 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Benjamin Richard Oldach, DO's MIPS final score?
The 2023 MIPS final score is 96.5 of 100. 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.