DR. JOHN PHILIP SEISMAN JR. DDS
NPI 1497000459
Dentist - General Practice in California, MD
About Dr. John Philip Seisman Jr. Dds NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN PHILIP SEISMAN JR. DDS (NPI 1497000459) is an individual general practice provider in California, Maryland, licensed in Maryland (15042) and active in the NPI registry since July 2012. He has opted out of Medicare through July 29, 2028.
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Opted out of Medicare
Dr. John Philip Seisman Jr. Dds has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from July 29, 2022 through July 29, 2028.
Other Providers at the Same Location NPPES 2
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
CALIFORNIA, MD 20619
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 Seisman's NPI number?
The NPI number for John Seisman is 1497000459. It was assigned to this individual provider in the NPPES registry on July 16, 2012.
Where is John Seisman located?
John Seisman practices at 23192 Three Notch Rd, California, MD 20619. The listed phone number is (301) 862-2231.
What is John Seisman's specialty?
The primary specialty registered for this NPI is Dentist, specializing in General Practice, with taxonomy code 1223G0001X.
Is John Seisman enrolled in Medicare?
No. John Seisman has opted out of Medicare through July 29, 2028. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out.
What insurance does John Seisman accept?
Health plans from Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma, Blue Cross and Blue Shield of Texas, Humana and Renaissance Dental and 1 other insurer list John Seisman 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 Seisman was last updated on October 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 36 days 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 Philip Seisman Jr., DDS · NPI 1497000459
General Practice provider in California, Maryland. Individual provider, active in the CMS NPPES registry since July 16, 2012.
## Identity
- **NPI:** 1497000459 (Entity type: Individual)
- **Enumerated:** July 16, 2012
- **Primary specialty:** Dentist - General Practice · taxonomy 1223G0001X
- **State license:** 15042 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 23192 THREE NOTCH RD, California, MD 20619-2401
- **Phone:** (301) 862-2231 · **Fax:** (301) 862-1981
## Medicare
- **Medicare:** Opted out of Medicare (opt-out affidavit on file, in effect through July 29, 2028); services are provided under private contract
## Record status
- **NPPES last updated:** October 2, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1497000459) · Data from the CMS NPPES public registry.