DR. JOHN WEBER DENNINGER MD, PHD
NPI 1871555888
Psychiatry & Neurology - Psychiatry in Boston, MA
About Dr. John Weber Denninger Md, Phd NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN WEBER DENNINGER MD, PHD (NPI 1871555888) is an individual psychiatry provider in Boston, Massachusetts, licensed in Massachusetts (221542) and active in the NPI registry since April 2006. He is enrolled in Medicare PECOS and is a graduate of University Of Michigan Medical School (2000).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. John Weber Denninger Md, Phd is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
3Medicare enrollment records show John Denninger reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,234 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,360 clinicians in this Medicare group
Bylas, AZ 85530
- Reassigned Medicare billing, Texas enrollment
- 438 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02114 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is John Denninger's NPI number?
The NPI number for John Denninger is 1871555888. It was assigned to this individual provider in the NPPES registry on April 5, 2006.
Where is John Denninger located?
John Denninger practices at 50 Staniford St Ste 401, Boston, MA 02114. The listed phone number is (617) 726-2985.
What is John Denninger's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.
Is John Denninger enrolled in Medicare?
Yes. John Denninger is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for John Denninger's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Denninger reassigns Medicare benefits to 3 organizations: The General Hospital Corporation (Boston, MA), Massachusetts General Physicians Organization Inc (Boston, MA) and San Carlos Apache Healthcare Corporation (Bylas, AZ). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for John Denninger's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does John Denninger accept?
Health plans from Harvard Pilgrim Health Care, Taro Health and WellSense Health Plan list John Denninger as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for John Denninger was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. John Weber Denninger, MD, PHD · NPI 1871555888
Psychiatry physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since April 5, 2006.
## Identity
- **NPI:** 1871555888 (Entity type: Individual)
- **Enumerated:** April 5, 2006
- **Primary specialty:** Psychiatry & Neurology - Psychiatry · taxonomy 2084P0800X
- **State license:** 221542 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 50 STANIFORD ST STE 401, Boston, MA 02114-2541
- **Phone:** (617) 726-2985 · **Fax:** (617) 724-3028
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): The General Hospital Corporation (NPI 1023049236, Boston, MA); Massachusetts General Physicians Organization Inc (NPI 1801874573, Boston, MA); San Carlos Apache Healthcare Corporation (NPI 1417330713, Bylas, AZ) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Michigan Medical School, class of 2000
## Record status
- **NPPES last updated:** July 8, 2007
- **Other identifiers:** Medicare ID-Type Unspecified A38216 (MA); Medicare UPIN I26729
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Source: [NPI Profile](https://npiprofile.com/npi/1871555888) · Data from the CMS NPPES public registry.