Andrew Otto, M.D.
Emergency Medicine Physician · Walnut Creek, CA
Andrew Otto, M.D. is an emergency medicine physician with a practice address in Walnut Creek, California, and NPI 1578862157, issued on Mar 21, 2011. Check the license (California A138024, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Andrew Otto
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- A138024 CA
MD61129047 WA
Self-reported in NPPES; status is on the state search - Practice location
- 1990 N California Blvd, Walnut Creek, CA 94596
- Phone
- (540) 981-7000
- Enumerated
- Mar 21, 2011
- Record last updated
- Jun 15, 2022
- Medicare enrollment
- Enrolled (PECOS I20210611002590); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 1990 N California Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Peter Barnett, M.D.Emergency Medicine Physician1699882589
- Kennard Beard, P.A.Surgical Physician Assistant1588960694
- Peter Benson, M.D.Emergency Medicine Physician1487680393
- Zacharia Greenlee, PA-CPhysician Assistant1427469097
- Kevin King, PA-CPhysician Assistant1841509171
- Huu Nguyen, D.O.Internal Medicine Physician1811966492
Verify Andrew Otto in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A138024Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
60% fewer Medicare Part D claims than the average emergency medicine physician in 2024
90 Medicare Part D claims for 63 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Most prescribed
- Cephalexin11 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
- Okanogan County Public Hospital District NO. 3Omak, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Andrew Otto among 7,751 emergency medicine physician records in California
Andrew Otto, M.D. is one of 7,751 emergency 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 2011, is newer than 60% of them.
- NPI issued2011 · 60% of these records are older, 37% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2010 · median 2011 among the 4,560 with a school on file
- Record last updated2022 · 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 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
95 emergency medicine physician records list a practice address in Walnut Creek
They are 95 of the 6,170 NPPES records with a practice address in Walnut Creek, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Walnut Creek → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Peter Barnett, M.D.Walnut Creek, CA 945961699882589
- Brian Baskin, MDWalnut Creek, CA 945961770554693
- Peter Benson, M.D.Walnut Creek, CA 945961487680393
- Scott Chamberlain, M.D.Walnut Creek, CA 945961356395453
- Charles Hansen, MDWalnut Creek, CA 945961891873956
- Christopher Jaksa, MDWalnut Creek, CA 945961619055779
- Conrad Lai, M.DWalnut Creek, CA 945961942248141
- Hannon Patel, MDWalnut Creek, CA 945961336227495
Common questions
What is Andrew Otto, M.D.'s NPI number?
Andrew Otto, M.D.'s National Provider Identifier (NPI) is 1578862157, issued on Mar 21, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Andrew Otto, M.D. located?
The NPPES record lists a practice address at 1990 N California Blvd, Walnut Creek, CA, 94596. Phone: (540) 981-7000. Providers update this record themselves, so call before visiting.
How can I verify Andrew Otto, M.D.'s license?
NPPES lists California license number A138024, 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 Andrew Otto, M.D. prescribe under Medicare Part D?
In 2024, Andrew Otto, M.D. had 90 Medicare Part D claims for 63 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.