Harris Wasser, MD
Internal Medicine Physician · Simi Valley, CA
Harris Wasser, MD is an internal medicine physician with a practice address in Simi Valley, California, and NPI 1609915768, issued on Feb 5, 2007. Check the license (California A 37142, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Harris Wasser
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A 37142 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2950 N Sycamore Dr #200, Simi Valley, CA 93065
- Phone
- (805) 522-4004
- Enumerated
- Feb 5, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (805) 583-3709
- Medicaid ID
- 00A371421 CA
- Medicare enrollment
- Enrolled (PECOS I20110204000046); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Harris Wasser in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A 37142Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average internal medicine physician in 2024
273 Medicare Part D claims for 88 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 22% of claims.
Most prescribed
- Mounjaro19 claims
- Levothyroxine Sodium14 claims
- Amoxicillin-Clavulanate Potass13 claims
- Cephalexin11 claims
- Repatha Sureclick11 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): 65.6 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).
Industry payments in 2024: $167.16
3 payments; by number, the most common kind was food and beverage; the largest payer was E.R. Squibb & Sons, L.L.C. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Harris Wasser among 17,696 internal medicine physician records in California
Harris Wasser, MD is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 44% of them.
- NPI issued2007 · 44% of these records are older, 44% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1977 · median 2004 among the 11,065 with a school on file
- Record last updated2007 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
25 internal medicine physician records list a practice address in Simi Valley
They are 25 of the 1,397 NPPES records with a practice address in Simi Valley, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Simi Valley → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- George Dichter, M.D.Simi Valley, CA 930651841265261
- Gurdip Flora, M.DSimi Valley, CA 930651164611075
- Chandrashekhar Joshi, MDSimi Valley, CA 930651215049374
- Charles Kennedy, MDSimi Valley, CA 930651942576111
- William Lee, MDSimi Valley, CA 930651619960705
- Mojgan Makhsoosi, M.D. INC.Simi Valley, CA 930651346218658
- Smita Mandal, M.D.Simi Valley, CA 930651285876854
- William Matzner, M.D., PH.D.Simi Valley, CA 930651306905716
Common questions
What is Harris Wasser, MD's NPI number?
Harris Wasser, MD's National Provider Identifier (NPI) is 1609915768, issued on Feb 5, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Harris Wasser, MD located?
The NPPES record lists a practice address at 2950 N Sycamore Dr #200, Simi Valley, CA, 93065. Phone: (805) 522-4004. Providers update this record themselves, so call before visiting.
How can I verify Harris Wasser, MD's license?
NPPES lists California license number A 37142, 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 Harris Wasser, MD prescribe under Medicare Part D?
In 2024, Harris Wasser, MD had 273 Medicare Part D claims for 88 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Harris Wasser, MD's MIPS final score?
The 2023 MIPS final score is 65.6 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.