Matthew S. Kayser, MD
Psychiatry Physician · Philadelphia, PA
Matthew S. Kayser, MD is a psychiatry physician with a practice address in Philadelphia, Pennsylvania, and NPI 1790928869, issued on Apr 20, 2009. Check the license (Pennsylvania MD444399, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Matthew S. Kayser
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- MD444399 PA
Self-reported in NPPES; status is on the state search - Practice location
- 3535 Market St, Philadelphia, PA 19104
- Phone
- (215) 746-6700
- Enumerated
- Apr 20, 2009
- Record last updated
- Jun 6, 2013 (not updated in 13 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20130723000693); accepts Medicare assignment
- Medical or professional school
- Perelman School Of Med At The University Of Pennsylvania, 2009
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 2,662 in Pennsylvania → Look up another NPI →
Also registered at 3535 Market St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kelly Allison, PHDPsychologist1336466325
- Jay Amsterdam, MDPsychiatry Physician1982636320
- Joy Anderson, NPPsychiatric/Mental Health Nurse Practitioner1588231047
- Steven Arnold, MDPsychiatry Physician1437186327
- Brooke Bailer, PHDPsychologist1457607855
- Claudia Baldassano, MDPsychiatry Physician1598772048
Verify Matthew S. Kayser in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD444399Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
75% fewer Medicare Part D claims than the average psychiatry physician in 2024
245 Medicare Part D claims for 24 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D.
Most prescribed
- Mirtazapine24 claims
- Escitalopram Oxalate18 claims
- Clonazepam17 claims
- Lorazepam17 claims
- Doxepin Hcl15 claims
- Venlafaxine Hcl Er14 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 practice group's MIPS final score for 2023 (Medicare payment program): 85.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- University OF Penn - Medical GroupPhiladelphia, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Matthew S. Kayser among 2,662 psychiatry physician records in Pennsylvania
Matthew S. Kayser, MD is one of 2,662 psychiatry physician records with a practice address in Pennsylvania. 72% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 59% of them.
- NPI issued2009 · 59% of these records are older, 38% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 45% of these records are
- Graduated2009 · median 2003 among the 1,186 with a school on file
- Record last updated2013 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
727 psychiatry physician records list a practice address in Philadelphia
They are 727 of the 42,849 NPPES records with a practice address in Philadelphia, and 2,662 psychiatry physician records in Pennsylvania.
All 2,662 in Pennsylvania → Every provider in Philadelphia → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Steven Arnold, MDPhiladelphia, PA 191041437186327
- James Cornish, MDPhiladelphia, PA 191041417984337
- Charles Dackis, MDPhiladelphia, PA 191041922034628
- Sarah Demichele, MDPhiladelphia, PA 191041669408449
- Benoit Dube, MDPhiladelphia, PA 191041659307338
- Steven Huege, MDPhiladelphia, PA 191041598716367
- Deborah Kim, MDPhiladelphia, PA 191041477580389
- Avram MackPhiladelphia, PA 191041811972573
Common questions
What is Matthew S. Kayser, MD's NPI number?
Matthew S. Kayser, MD's National Provider Identifier (NPI) is 1790928869, issued on Apr 20, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Matthew S. Kayser, MD located?
The NPPES record lists a practice address at 3535 Market St, Philadelphia, PA, 19104. Phone: (215) 746-6700. Providers update this record themselves, so call before visiting.
How can I verify Matthew S. Kayser, MD's license?
NPPES lists Pennsylvania license number MD444399, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Matthew S. Kayser, MD prescribe under Medicare Part D?
In 2024, Matthew S. Kayser, MD had 245 Medicare Part D claims for 24 beneficiaries; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions only.
What is Matthew S. Kayser, MD's MIPS final score?
The 2023 MIPS final score is 85.5 of 100, reported for the practice group. 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.