Prodromal SymptomsPsychotic DisordersSchizophrenia
Dr. Larry Seidman, DO
NPI1821041039
- Part D claims, 2024
- 30
- Publications
- 335
- Clinical trials
- 3
- Industry payments
- $115
- State license
- 1
- Practice address
- 5501 Old York Rd, Philadelphia, PA 19141
- Practice phone
- Call (215) 676-8111
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Seidman's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Larry Seidman is a gynecology physician in Philadelphia, Pennsylvania
Dr. Seidman practices in Philadelphia, Pennsylvania.
Dr. Seidman's NPI, 1821041039, was assigned on May 18, 2006. Dr. Seidman holds Pennsylvania license OS003155L.
NPI and contact details
- NPI
- 1821041039NPI Registry (opens in a new tab)
- NPI enumeration date
- May 18, 2006
- NPI status
- Active
- Practice phone
- (215) 676-8111
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. Larry Seidman's practice address is in Philadelphia, Pennsylvania
Dr. Seidman's practice address in the NPI Registry is 5501 Old York Rd, Philadelphia, PA 19141, in Philadelphia County. The practice phone is (215) 676-8111.
- NPI Registry address5501 Old York Rd, Philadelphia, PA 19141 · Philadelphia CountyPhone(215) 676-8111
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Larry Seidman's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Seidman practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. Seidman's practice | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every site where Dr. Seidman practices
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Larry Seidman is one of 102 gynecology physicians in Pennsylvania
Gynecology is Dr. Seidman's primary specialty in the NPI Registry, under taxonomy code 207VG0400X. Dr. Seidman is licensed in Pennsylvania.
Specialties and state licenses
- Gynecology, PennsylvaniaPrimary
Gynecology physicians near Dr. Seidman
Counts of gynecology physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Larry Seidman wrote 30 Medicare Part D claims in 2024
In 2024, Dr. Seidman wrote 30 Medicare Part D claims. 97% of them were for generic drugs.
Part D claims, 202430
Dr. Seidman's Part D claims by kind of drug, 2024
- Generic29 claims97%
- Brand-name and other1 claims3%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
For MedTech and pharma teams
Find gynecology physicians like Dr. Seidman by procedure volume and prescribing
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Larry Seidman has 335 publications on record
Dmand AI links 335 papers to Dr. Seidman, published from 2005 to 2024. 2015 was the busiest year, with 36. The most frequent topics are Psychotic Disorders, Schizophrenia and Prodromal Symptoms. Dr. Seidman has published most often in Schizophr Res. Dr. Seidman's most frequent co-authors are Kristin S. Cadenhead, MD, Diana O. Perkins, MD and Daniel Henry Mathalon, MD.
Papers335
Years published2005 to 2024
Dr. Seidman's papers by year, 2015 to 2024
Topics Dr. Seidman writes about most
- Psychotic Disorders
- Schizophrenia
- Prodromal Symptoms
- Neuropsychological Tests
- Magnetic Resonance Imaging
- Brain
- Schizophrenic Psychology
- Risk
Dr. Seidman's most frequent co-authors
- Kristin S. Cadenhead, MD122 shared papers
- Diana O. Perkins, MD119 shared papers
- Daniel Henry Mathalon, MD99 shared papers
Recent publications by Dr. Seidman
Disease ProgressionProdromal SymptomsPsychotic Disorders
Biol Psychiatry
BrainCognitionCognitive Dysfunction
See who Dr. Seidman researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Seidman works with, so you can find a warm path to the right gynecology physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Larry Seidman has worked on 3 clinical trials
Dmand AI links Dr. Seidman to 3 clinical trials. 1 is still active or recruiting. Conditions studied include Psychotic Disorders, Schizophrenia and Prodromal Symptoms.
Conditions in Dr. Seidman's trials
- Psychotic Disorders
- Schizophrenia
- Prodromal Symptoms
- Schizotypal Personality Disorder
Investigators on the most trials with Dr. Seidman
- Matcheri S. Keshavan, MD2 shared trials
- Kristin S. Cadenhead, MD1 shared trial
- Vinod H. Srihari, MD1 shared trial
Recent clinical trials with Dr. Seidman
STEP-ED: Reducing Duration of Untreated Psychosis and Its Impact in the U.S. (opens in a new tab)
Completed
Psychotic DisordersSchizophrenia
Psychotic DisordersSchizophrenia
Family-Focused Therapy for Individuals at High Clinical Risk for Psychosis: A Confirmatory Efficacy Trial (opens in a new tab)
Active, not recruiting
Prodromal SymptomsSchizotypal Personality Disorder
Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. Larry Seidman received $115 in industry payments in 2025
CMS Open Payments shows 1 general payment to Dr. Seidman from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Novo Nordisk Inc paid the most, $115.
Companies that paid Dr. Seidman the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Larry Seidman's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Clinical trials and co-investigators | Dmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Larry Seidman
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Larry Seidman's NPI number?
Dr. Larry Seidman's NPI number is 1821041039. It was assigned on May 18, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Larry Seidman?
Dr. Larry Seidman is a gynecology physician in Philadelphia, Pennsylvania. The primary specialty in the NPI Registry is Gynecology Physician (taxonomy code 207VG0400X).
Where does Dr. Larry Seidman practice?
Dr. Seidman practices at 5501 Old York Rd, Philadelphia, PA 19141.
What is Dr. Larry Seidman's office phone number?
The practice phone on file for Dr. Seidman is (215) 676-8111.
What is Dr. Larry Seidman's medical license number?
Dr. Seidman holds Pennsylvania license OS003155L.
Has Dr. Larry Seidman received payments from drug or device companies?
CMS Open Payments shows $115 in general payments to Dr. Seidman from 1 company from 2025 to 2025. The largest total came from Novo Nordisk Inc.
How long has Dr. Larry Seidman been practicing?
Dr. Seidman's NPI was assigned in 2006.
Does Dr. Larry Seidman do research?
Dmand AI links 335 publications to Dr. Seidman, published from 2005 to 2024. Dr. Seidman has worked on 3 clinical trials.
Who does Dr. Larry Seidman publish with?
Dr. Seidman's most frequent co-authors are Kristin S. Cadenhead, MD (122 shared papers), Diana O. Perkins, MD (119 shared papers) and Daniel Henry Mathalon, MD (99 shared papers).
Selling to gynecology practices?
See gynecology physicians in Pennsylvania by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card