Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. JOHN PHILIP SEISMAN JR. DDS
NPI 1497000459
Dentist - General Practice in California, MD

Q: 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.

Q: What is John Seisman's specialty?

The primary specialty registered for this NPI is Dentist, specializing in General Practice, with taxonomy code 1223G0001X.

Q: 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 15 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.

Active since July 16, 2012

23192 THREE NOTCH RD, CALIFORNIA, MD 20619(301) 862-2231(301) 862-1981 Get Directions Write a Review

NPPES record last updated: October 2, 2026. Verified against the NPPES registry weekly; last sync: October 11, 2026.

On this page

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.

NPPES Registry Identity

NPI1497000459

Entity TypeIndividualMale

Primary Taxonomy1223G0001X

Provider Legal NameDR. JOHN PHILIP SEISMAN JR.Credential: DDS

Location Address23192 THREE NOTCH RDCalifornia, MD 20619-2401

Mailing Address23192 Three Notch RdCalifornia, MD 20619-2401 · (301) 862-2231 · Fax (301) 862-1981

Phone(301) 862-2231

Fax(301) 862-1981

Sole ProprietorNo

Enumeration DateJuly 16, 2012

Last NPPES UpdateOctober 2, 2026

NPPES CertifiedOctober 2, 2026

✔ NPI 1497000459 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentist · General PracticeDental Providers

Taxonomy Code1223G0001X

License✔ Licensed in MD · 15042

Definition

A general dentist is the primary dental care provider for patients of all ages. The general dentist is responsible for the diagnosis, treatment, management and overall coordination of services related to patients' oral health needs.

23192 THREE NOTCH RD, California, MD 20619

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma, Blue Cross and Blue Shield of Texas and more.Insurance ›

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.

DR. PHILLIP MC LEAN CHRISTIE D.D.S., M.A.G.D.

Dentist (General Practice)

23192 THREE NOTCH RD
CALIFORNIA, MD 20619

St. Mary's County (301) 862-2231

THREE NOTCH DENTAL

Clinic/Center (Dental)

23192 THREE NOTCH RD
CALIFORNIA, MD 20619

St. Mary's County (301) 862-2231

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.

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 and Renaissance Dental 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 15 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.