Peter Sebastian Masny, MD
Neurology Physician · Arroyo Grande, CA
Peter Sebastian Masny, MD is a neurology physician with a practice address in Arroyo Grande, California, and NPI 1144376740, issued on Jan 26, 2007. Check the license (California A113136, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Peter Sebastian Masny
- Credential
- MD
- Primary taxonomy
- Neurology Physician 2084N0400X
- License number
- A113136 CA
Self-reported in NPPES; status is on the state search - Practice location
- 850 Fair Oaks Ave Ste 100, Arroyo Grande, CA 93420
- Phone
- (805) 547-2224
- Enumerated
- Jan 26, 2007
- Record last updated
- Nov 6, 2023
- Fax
- (805) 547-2228
- Medicare enrollment
- Enrolled (PECOS I20110103000343); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 850 Fair Oaks Ave Ste 100
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Peter Sebastian Masny in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A113136Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
10% fewer Medicare Part D claims than the average neurology physician in 2024
1,231 Medicare Part D claims for 197 beneficiaries, against an average of 1,370 among the 15,005 providers of this specialty who prescribed in Part D.
Most prescribed
- Levetiracetam104 claims
- Donepezil Hcl81 claims
- Gabapentin77 claims
- Lacosamide75 claims
- Topiramate57 claims
- Carbidopa-Levodopa44 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).
Industry payments in 2024: $40.21
2 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 10,858 providers of this specialty with any payment received $8,318.07 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.
Bills Medicare through one group practice
- Pacific Central Coast Health CentersArroyo Grande, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Neurology Physician providers in California
There are 2,339 neurology physician records in California.
Other neurology physician records in California
- Venkat Raghav Aachi, MDThousand Oaks, CA1740640051
- John Aalbers, M.D.San Diego, CA1942262431
- Kafia Abbasi, M.D.French Camp, CA1215114897
- Puya Abbassi, D.O.San Jose, CA1831695428
- Ahmed Abdelhak, MB CHBSan Francisco, CA1053013748
- Diana Abdulrahman, M.D.Pomona, CA1518276880
- Hadi Abou El Hassan, MDLos Angeles, CA1053995720
- John Paul Aboubechara, MD, PHDPalo Alto, CA1205461803
- Saheil AboutalibLong Beach, CA1548551112
- Justin Abraham, M.D., M.B.A.Santa Barbara, CA1225322522
Common questions
What is Peter Sebastian Masny, MD's NPI number?
Peter Sebastian Masny, MD's National Provider Identifier (NPI) is 1144376740, issued on Jan 26, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Peter Sebastian Masny, MD located?
The NPPES record lists a practice address at 850 Fair Oaks Ave Ste 100, Arroyo Grande, CA, 93420. Phone: (805) 547-2224. Providers update this record themselves, so call before visiting.
How can I verify Peter Sebastian Masny, MD's license?
NPPES lists California license number A113136, 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 Peter Sebastian Masny, MD prescribe under Medicare Part D?
In 2024, Peter Sebastian Masny, MD had 1,231 Medicare Part D claims for 197 beneficiaries; the average among neurology physician prescribers was 1,370. Part D covers Medicare prescriptions only.
What is Peter Sebastian Masny, MD'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.