William J. Massinger IV, LCSW
- Medicare patients, 2024
- 11
- Affiliated sites
- 1
- Medical group
- 1
- State license
- 1
- Year NPI issued
- 2007
- Practice address
- 504 Lakeside Park, Southampton, PA 18966
- Practice phone
- Call (215) 354-0777
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
New Leaf Psychotherapy Services
Southampton, Pennsylvania
Find William Massinger'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.
William J. Massinger IV is a clinical social worker in Southampton, Pennsylvania
William Massinger practices at New Leaf Psychotherapy Services in Southampton, Pennsylvania.
William Massinger's NPI, 1255466371, was assigned on February 22, 2007. William Massinger holds Pennsylvania license CW008523L.
- NPI
- 1255466371NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6406097674
- NPI enumeration date
- February 22, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (215) 354-0777
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 58
- Medical school graduation
- 1994
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
William J. Massinger IV practices at New Leaf Psychotherapy Services in Southampton, Pennsylvania
William Massinger's primary practice is New Leaf Psychotherapy Services, at 504 Lakeside Park, Southampton, PA 18966 in Bucks County. The practice phone is (215) 354-0777.
- New Leaf Psychotherapy Services504 Lakeside Park, Southampton, PA 18966 · Bucks CountyPhone(215) 354-0777
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
William J. Massinger IV is affiliated with 2 sites of care and 1 medical group
William Massinger's primary practice is New Leaf Psychotherapy Services in Southampton, Pennsylvania. The medical group on file is New Leaf Psychotherapy Services. Dmand AI also links William Massinger to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at William J. Massinger IV's practice
Dmand AI tracks the electronic health record (EHR) system at each site where William Massinger practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| New Leaf Psychotherapy Services | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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William J. Massinger IV is one of 2,860 clinical social workers in Pennsylvania
Social worker is William Massinger's primary specialty in the NPI Registry, under taxonomy code 1041C0700X. The record also lists clinical. William Massinger is licensed in Pennsylvania.
Specialties and state licenses
- Clinical social worker, PennsylvaniaPrimary
Clinical social workers near William Massinger
Counts of clinical social workers 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
William J. Massinger IV treated 11 Medicare patients in 2024, average age 68
CMS counts 11 Medicare patients who saw William Massinger in 2024. The largest group is 85 and over, with 0 patients. Their average risk score is 0.91, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts William Massinger's median patient age at 43, with 32% women.
William Massinger's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
William Massinger's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 43
Patient panel by sex, all payers
- Women32%
- Men67%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How William J. Massinger IV takes part in Medicare
William Massinger accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
Sources for William J. Massinger IV'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 |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (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 William J. Massinger IV
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is William J. Massinger IV's NPI number?
William J. Massinger IV's NPI number is 1255466371. It was assigned on February 22, 2007, and it is active in the NPI Registry.
What does William J. Massinger IV specialize in?
William J. Massinger IV is a clinical social worker in Southampton, Pennsylvania. The primary specialty in the NPI Registry is Clinical Social Worker (taxonomy code 1041C0700X).
Where does William J. Massinger IV practice?
William Massinger practices at 504 Lakeside Park, Southampton, PA 18966. William Massinger's primary practice is New Leaf Psychotherapy Services in Southampton, Pennsylvania. Dmand AI also links William Massinger to 1 group practice or clinic.
What is William J. Massinger IV's office phone number?
The practice phone on file for William Massinger is (215) 354-0777.
What is William J. Massinger IV's medical license number?
William Massinger holds Pennsylvania license CW008523L.
What medical group is William J. Massinger IV part of?
William Massinger is linked to New Leaf Psychotherapy Services.
Does William J. Massinger IV accept Medicare?
Yes. CMS lists William Massinger as accepting Medicare assignment.
How many Medicare patients does William J. Massinger IV see?
CMS counts 11 Medicare patients who saw William Massinger in 2024, with an average age of 68.
How long has William J. Massinger IV been practicing?
William Massinger graduated from medical school in 1994, 32 years ago.
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